Industrial IT for Utility Communications. Communicate IT Power Line Carrier ETL500

Transcription

1 Industrial IT for Utility Communications Communicate IT Power Line Carrier ETL500

2 Features Software programmable Power Line Carrier (PLC) unit for the transmission of speech, data and protection signals Latest signal processor technology permits tailor-made solutions for each specific application, with optimal operating behaviour, even under the most adverse line conditions Optional fitting with digital multiplexer AMX500 for operation with data rates up to 64 kbps Adaptive adjustment of the data rate according to the prevailing line characteristics Integrated, software programmable protection signalling equipment NSD550 for maximum performance Integrated NSK5 data modem for lowspeed data channels for SCADA applications Three transmission power classes (5 watt, 40 watt, 80 watt) available, utilizable according to line conditions Programmable over the carrier frequency range 24 to 500 khz Operation with 1 or 2 transmission channels Direct Digital frequency Synthesis (DDS) provides maximum stability of the frequency conversion Standard interfaces for speech transmission and telecontrol applications Modular compact design for minimum hardware expenditure and maximum reliability Windows based Man-Machine Interface MMI500 Embedded Operations Channel (EOC) for remote monitoring and remote configuration of the equipment Remote access via Internet and dial-up modem Meets or exceeds IEC and IEC requirements Complies with safety and electromagnetic capability (EMC) requirements of the European Community (EC) Applications The fully digital ETL500 Power Line Carrier set is a multipurpose equipment designed for the transmission of speech, data and protection signals over power lines or cables. The equipment can be used on power lines of any voltage level or length. Moreover, with the considerably enhanced transmission capacity provided by the digital add-on facility AMX500, several new applications can be identified. The frequency congestion problem is considerably relieved, as several times more information can be packed into the same carrier frequency band, therefore fewer RF carrier channels are needed. With 64 kbps transmission rate, a cost-efficient interconnection between digital wideband networks can be established. High-capacity PLC link is also best suited to serve as a back-up path for vital information conveyed through fibre-optic or microwave links. 2

3 ETL500 Power Line Carrier equipment is suitable for a wide range of applications LT LT C C ETL500 ETL500 M M DC M PR PC MS PAX FAX PR PC RTU FAX C = Coupling Device DC = Dispatcher's Console FAX = Facsimile equipment LT = Line trap M = Modem MS = Master Station PAX = Privat Automatic Exchange PR = Protection Relay PC = Personal Computer RTU = Remote Terminal Unit Solution to frequency congestion Because of the limitation of the available PLC frequency spectrum, the extension of existing networks often becomes very difficult. An ETL500 equipped with the AMX500 may replace 2 to 4 existing analogue PLC links and therefore provides a solution to bottlenecks in the existing PLC network. For a given number of services, the number of PLC channels needed can be reduced significantly and therefore frequency allocation becomes easier. The example beside illustrates how the frequency allocation scheme can be Station A B C D E Transmission lines 4 khz steps Digital PLC relieves the problem of frequency congestion Tx Rx Analog PLC Digital PLC replaced 3

4 made less dense if analogue carrier sets are replaced by their digital counterparts. This provides frequency space for the new carrier channels to be allocated. Back-up of wideband communication links With the standard serial data interface according to ITU-T X.21 provided by the AMX500, the system is prepared for being connected to a PDH (Plesiochronous Digital Hierarchy) multiplexer. This opens up a variety of options for accessing to a digital wideband network. At the outskirts of a power system communications network there is usually low-density traffic which does not justify the investment for a high-capacity fibre installation. With digital PLC equipment, a lowcost tributary link to the wideband backbone system may be installed as an alternative. Customer benefits Robust design The ETL500 concept is based on ABB s long experience in the field of power line carrier equipment. The electrical and the mechanical design make use of the most advanced technologies. Design principles proven in the area of power system communication enable the ETL500 equipment to withstand harsh environmental conditions. Whilst using latest processor technology, the number of modules could be greatly reduced. The shrinking of the hardware to a bare minimum ensures maximum reliability. Furthermore, the reduced number of different spare parts results in considerable cost savings. Wideband system PDH/SDH 2 Mbps to 622 Mbps X.21 X.21 X.21 AMX 500 PLC Narrowband Back-up 64 kbps NSD 550 NSD 550 Back-up systems for backbone channels X.21 AMX 500 Digital PLC is also a favourable alternative when there is a need to establish stand-by routes for critical services in high-capacity networks, i.e. fibre-optic links and microwave links. The ETL505 with 5 watt power output consists of one 19 subrack, 6 units high, comprising the complete set of functional modules. Application of this type of equipment is adequate for medium voltage power lines of short to moderate distance. For the ETL540 / ETL580 versions, one respectively two more subracks of 3 units high, comprising the power modules, have to be added. The 40 watt or 80 watt power output is needed for applications on longer high-voltage power lines. The front picture displays the tier block complement of the ETL540 together with AMX500. Enhanced transmission capacity The use of a new type, adaptive, digital transmission procedure permits maximum utilization of the transmission capacity of a PLC channel. The high-efficiency transmission is achieved by the functional unit AMX500, comprising signal converter, multiplexer and additional modules for the speech compression. 4

5 Investment protection Any PLC equipment can be retrofitted with the AMX500 to increase capacity. This enables existing communication infrastructure to be used more efficiently without the need for high reinvestment. For example, one AMX500 is often sufficient for the additional transfer of a few speech and data services; the requirement for costly wideband equipment is dispensed with. The concept allows for a seamless transition from an ETL500 equipment working in standard mode to a PLC set operated in high-capacity mode by adding the AMX500 unit housed in its own subrack. Retrofitting and upgrading an ETL500 equipment into one working in high-capacity mode is possible any time on site. Frequency allocation in an existing network will remain unaffected, i.e. there is no need to change line traps and coupling filters. Operational flexibility, modes of operation Unique features, such as single-step digital frequency conversion, automatic channel equalization, configurable AF options, event recorder, built-in test facilities, to name just a few, add to the operational flexibility. The Direct Digital Synthesis method, which is used to generate the RF signal, results in excellent quality and stability of the AF to RF and RF to AF conversions. The carrier frequency parameters detailed below are easily configured by means of the userfriendly MMI500. Carrier frequency: Can be set in steps of 500 Hz in the frequency range from 24 to 500 khz Number of channels: 1 or 2 Channel-bandwidth: 4 or 8 khz Position of the individual sidebands: Can be configured individually to be in the upright or inverted position The ETL500 design is unique as it combines robustness and transparency of analogue equipment with the advantage of increased transmission capacity provided by digital transmission equipment. This feature makes the equipment compatible with existing analogue PLC systems and results in outstanding flexibility with regard to the applications. The system may be used in various modes of operation depending on the requirements, type of services, line conditions, etc. Three examples illustrate possible ways of using a given frequency band and demonstrate the versatility of the ETL500 system. Example 1: When using ETL500 single channel equipment the capacity can considerably be enhanced by adding the AMX500 unit. A possible configuration is illustrated below. This arrangement permits a data channel with a transmission rate of 4800 bps to be superimposed above the speech channel, within which the tones for protection signalling are allocated. Speech 4 khz Data AMX ETL540 + AMX500 / 4 khz Single channel equipment with superimposed fast data channel 1 speech channel band limited Pilot Teleprotection function with NSD550 1 data channel synchronous 4800 bps 5

6 Speech Data NSK Pilot Data AMX Pilot Data AMX Pilot 4 khz 4 khz 8 khz ETL540 + AMX500 / 8 khz Double channel equipment configured for hybrid mode of operation Channel 1: 1 speech channel band limited 3 low-speed FSK channels 200 baud for SCADA application Teleprotection function with NSD550 Channel 2: High-speed mode of operation, aggregate data rate 28.8 kbps carrying: ETL540 + AMX500 / 8 khz Single channel equipment configured for high-speed operation occupying 8 khz bandwidth Aggregate data rate 64 kbps carrying e.g.: 2 speech channels 1 data channels synchronous 19.2 kbps 3 data channels asynchronous 2.4 kbps Teleprotection function (with NSD550) 1 speech channel 1 data channel synchronous 14.4 kbps 2 data channels asynchronous 2.4 kbps Example 2: The illustration above depicts an ETL500 double channel equipment, occupying 8 khz bandwidth. With this configuration one channel may be exploited for operational speech combined with teleprotection and low-speed data for SCADA application, whilst the other channel may convey highspeed data and several compressed speech channels. Example 3: The illustration above on the right side shows an ETL500 single channel equipment requiring 8 khz band, but configured to work in high-speed mode using the entire bandwidth. With this configuration a transmission rate up to 64 khz may be obtained under favourable line conditions. A possible subdivision of the available capacity among different services may be as follows: 2 speech channels 1 data channels 19.2 kbps synchronous 3 data channels 2.4 kbps asynchronous. Optimum performance of the teleprotection service is ensured by the NSD550 which operates entirely independent of the AMX500 unit. Easy commissioning, testing, supervision, and maintenance All operating states are monitored, recorded, and evaluated by the CPU module P4LQ, which also takes care of the frequency up-and-down conversion. The ETL500 comes with the software MMI500, which is a Windows based program running on any standard PC. When a serial port of the PC is connected to the SUB-D connector on the frontplate of the module P4LQ, the MMI500 implements a man-machineinterface (MMI) for the ETL500, supporting commissioning, testing, troubleshooting, supervision, and maintenance. In addition to the alarms displayed by the MMI500, LEDs on the front panel light up when an alarm is activated. Appropriate actions on the module are started and there are three switchover relay contacts available for issuing an alarm. Eight more relay contacts can be provided with the optional alarm relay module R1BC. Two alarm criteria which can be associated with these contacts may be specified and 6

7 entered by means of the MMI500. Non-critical alarm situations are signalled as deferred alarms. For network extensions, Tx and Rx filters can be simply re-tuned on site with the aid of two tuning adapters and a level meter. Man-machine interface MMI500 The MMI500, a 32-bit Windows program running on any standard PC, offers: Off line configuration of an ETL500 terminal with the facility for saving the settings in a file for later use, e.g. download it when an ETL500 equipment has to be configured accordingly. Configuration and supervision of both the local and the remote terminal of an ETL500 link from either side of the link. Dialog windows to configure all the settings of the ETL500 equipment, e.g. carrier frequency characteristics, alarm parameters, AF interface functions, NSD550 parameters, equipment identification, etc. View windows displaying detailed status and alarm information of the ETL500 in text or graphic form, which can be copied into documents, printed out or saved to a file. Measuring facilities which can access a number of AF test points internal to the ETL500 and display the signals in graphic form in the frequency domain format. Automatic channel equalization of amplitude and group-delay response of the complete AF band in both transmission directions from one side of the link. Graphic display of the equalized and of the non-equalized frequency response is provided. The information can be printed out or saved. Automatic polling and logging of alarms to a file in the PC. Data anisochronous E & M Signalling Speech + inband signalling Teleoperation (Modem, FSK) Speech, E & M Signalling, Inband signalling, FAX Data, synch., asynch. 64 kbps, RS-422, X.21 Teleprotection Assistance for tuning and testing of the local ETL500 terminal. All signals needed for tuning and testing the RF filters and AF options are generated. Help utility with explanations for all actions supported by the MMI. Event recorder for 1000 teleprotection events and 1000 alarm events with a time resolution of 1 ms if synchronized to a GPS clock. When the ETL500 equipment is integrated in a network management system, each equipment can be accessed via a unique device number. The architecture of the digital PLC equipment ETL500 The schematic block diagram below shows an overview of the simple and extremely practical system architecture. The construction of a full PLC multipurpose equipment requires only a few functional units which communicate via the internal bus. The basic unit comprises solely the interface for the Block diagramm ETL500 + AMX500 NSK5 O4LE AMX500 G4AI System Bus P4LQ NSD 550 processing Supervision AF / RF Conversion Line Interface RF Alarms 7

8 speech and telecontrol signals O4LE, the separate command interface for the protection signal transmission G4AI and the central processor unit P4LQ which deals with the various signal processing and monitoring functions. Where required, the modem NSK5 is available for transferring low-speed data for SCADA applications. Also required is the line interface via which the signal exchange takes place from and to the coupling unit. The degree of utilization of the channel capacity can be considerably increased by using the digital multiplexer / signal converter AMX500. An essential feature is the fact that mission critical services can be conducted via modules operated separately from the AMX500 unit. The rigorous demands of these critical services with respect to transmission time and interference can be satisfied excellently by this separation. The configuration and monitoring of the system takes place by PC via the diagnostic interface. Central processor unit P4LQ The following central functions are executed on the functional unit P4LQ: Digital SSB (Single Side Band) modulation in the DDS procedure Central monitoring of the hardware and software functions Generation and evaluation of the pilot signal for a wide range of functions Frequency synchronization Signal quality monitoring Automatic frequency response measurement and channel equalizing Serial interface for PC connection for the equipment configuration and monitoring RF line interface The line interface comprises all the functional units necessary for the transmission and receive side signal coupling to the high-voltage line. These are the power amplifier, RF hybrid, transmit and receive filters. ETL500 equipment is available in 3 power classes: ETL505 with 5 watt output power Application of this type of equipment is adequate for medium voltage power lines of short to moderate distance. ETL540 / ETL580 with 40 watt and 80 watt output power 40 watt or 80 watt output power is needed for applications on long high-voltage power lines. AF interface O4LE The universal interface module O4LE provides an audio frequency interface for the following applications: Telephony Point-to-point hot line Remote subscriber 4-wire PABX interface with E&M 2/4-wire PABX interface with E&M and hybrid control Service telephone Teleoperation Transmission of audio frequency data signals from modems Programmable transit filter Connection of external teleprotection equipment, such as NSD70C External teleprotection equipment Signal boosting control The unit is fully programmable via PC / MMI500. 8

9 Integrated teleprotection equipment NSD550 General The NSD550 teleprotection equipment is used for the transmission of protection commands in highvoltage networks. The equipment is used exclusively together with type ETL500 PLC equipment. It is always assigned to the first channel in case of a dual-channel PLC. The NSD550 signals are processed completely digitally on the RF-converter module P4LQ of the basic ETL500 equipment. The NSD550 comprises at least one relay interface module type G4AI for command transmission. As contact multipliers or to exploit all possible NSD550 functions, 1 or 2 additional interface modules can be plugged in the channel subrack. Optimized algorithms for PLC channels Using digital signal processing technologies, the NSD550 meets the stringent requirements for command transmission over PLC links even under the most adverse channel conditions. Algorithms optimized for PLC channels ensure dependable and secure operation and short transmission delays. Remote Supervision & Configuration Configuration, supervision and adapting to the specific requirements is effected by means of the MMI500 user interface. Event recorder and trip counter Integrated trip counters for each command and an event recorder which stores more than 2000 command start/stop and alarm events support troubleshooting and investigations in case of faults or abnormal conditions in the high-voltage network. The events are stored with time stamp in a nonvolatile memory. The event recorder can be synchronized to an external GPS receiver for accurate time stamping. The display of events is possible in text and graphic views on the MMI500. Applications NSD550 meets all requirements for blocking, permissive and direct tripping. Depending on the application requirements, NSD550 can transmit up to four commands with two different modes of operation, i.e. either 2 permissive + 2 direct trip, or 3 permissive + 1 direct trip commands. Four commands permit, for example, the protection of dual-circuit lines and direct tripping for reactor or breaker failure protection. NSD550 requires no extra bandwidth because it uses the pilot of the PLC as a guard signal and the speech band as command channel. Integrated data modem NSK5 General The integrated data modem NSK5 is used mainly for the transfer of low-speed data with SCADA systems. The module is plugged in to the channel subrack like any other AF-interface card. All functions are incorporated on a single card. This permits especially low-cost solutions when building up telecontrol networks. Several modems can be plugged in where necessary. Principal features Full programmability; baud rate, transmit and receive frequencies, also Tx/Rx levels are simple to set via switches and jumpers. All channels and baud rates corresponding to ITU-T R.35, R.37. R.38A and R.38B are supported. Operation is also possible with the following channels: maximum three 600 baud channels, 9

10 one 1200 baud channel for frequencies above 2000 Hz (speech) or in combination with other low-speed data channels; one 1200 baud channel corresponding to ITU-T V.23 or one 2400 baud channel. Distortion of the characteristic is minimized by a help module for synchronization, a data regenerator and equalizer. A serial data interface corresponding to ITU-T V.24, V.28, and V.10 is available with front access for test purposes. The modem is electrically isolated from the ETL500 modules. A local loop test is possible. It can be initialized either via the test switch on the front panel or the corresponding interface line. The bit error rate can be tested over the total line length. Multiplexer/converter unit AMX500 In an endeavour to enhance the transmission capacity of the available PLC frequency spectrum, a great deal of effort has been spent investigating more efficient signalling methods for power line carrier application. Principal features Transmission speed is automatically adjusted to the prevailing channel conditions in order to ensure maximum system availability, e.g. if data transmission at a set speed suffers from insufficient quality because of poor line conditions, fall-back to an appropriate lower transmission rate will restore the quality of service to the level required. Robust, bandwidth-efficient digital modulation Adaptive adjustment to the channel characteristics Adjustable bandwidth The bandwidth of the transmission system can be individually set between 1000 and 7300 Hz for each application. 8 different bandwidths are available. Flexible data rate programming The data rate of the AMX500 is programmable over the range 1200 bps to 64 kbps. The fine adjustment facility of the transmission rate permits optimal capacity utilization of the presently available bandwidth. The illustration below shows an example of bit rate utilization possibilities with 4 khz gross bandwidth of the transmission channel. Possible programming of the user bit rate with a 4 khz bandwidth PLC equipment ETL500 with the optional add-on unit AMX500 using techniques such as low bit-rate speech coding combined with time domain multiplexing and digital modulation can provide several times the transmission capacity per link under good line conditions, compared to traditional PLC circuits Programming examples for a data rate of 19.2 kbps Speech 7.2 kbps Speech 7.2 kbps Speech 4.8 kbps Sync Data 19.2 kbps Async Data 4.8 kbps Sync Data 9.6 kbps Speech 4.8 kbps Async Data 2.4 kbps Anisync Data 1.2 kbps Sync Data 4.8 kbps Speech 4.8 kbps Async Data 1.2 kbps The data rate depends on the available bandwidth and the channel characteristics 10 Up to 28.8 kbps in 4 khz bandwidth and up to 64 kbps in 8 khz bandwidth (each direction)

11 Planning information The following diagram is for supporting the planning of PLC links with digital transmission, i.e. when using the AMX500. Represented is the relation between bit rate and necessary signal-tonoise ratio (SNR) for a given maximum bit error rate and bandwidth. The bit rates shown are for the net bandwidths 1.4 / 1.7 / 2.1 / 3.3 and 7.0 khz and for a bit error rate (BER) of The curves are based on a large number of field and simulation tests. Example: A noise ratio of 37 db is necessary with a 3.3 khz bandwidth for a transmission rate of 28.8 khz. Bit rate / SNR characteristic (noise measured in 4 khz bandwith) Bit rate (kbps) 70.0 Bandwidth: * BW 7.0 khz BW 3.3 khz BW 2.1 khz BW 1.7 khz BW 1.4 khz * SNR (db) * 11

12 TECHNICAL DATA PLC part All modules of the ETL500 comply with or exceed the requirements according to IEC Publication 60495, second edition, Sept. 1993, with reference to single sideband PLC equipment. ETL500 complies with European EMC Directive 89/336/EEC and the Low-Voltage Directive 73/23/EEC. System data System data Operating mode Carrier frequency range Total range AF bandwidth Output rated impedance Service PC interface Alarm outputs Single sideband mode with suppressed carrier 24 to 500 khz 40 to 500 khz programmable 300 to 4000 Hz / 300 to 8000 Hz 75 or 125 ohm unbalanced, optional 150 ohm balanced RS-232 / 9600 bps potential-free changeover contacts for system alarm / cabinet alarm hardware alarm link alarm Electromagnetic compatibility and insulation tests Complies with the EMC requirements for: Emission EN (EN class A) Immunity EN Electrical safety Complies with the safety requirements according to IEC / EN Transmitter data Transmitter data Type ETL505 ETL540 ETL580 HF output power 5 W 40 W 80 W Peak Envelope Power (PEP) (+37 dbm) (+46 dbm) (+49 dbm) Type ETL505 ETL540 ETL540 Number of channels Nominal bandwidth 4 khz 4 khz 8 khz Max. line attenuation 51 db 60 db 54 db Due to line noise, the line attenuation should not exceed the following values 25 to 30 db 35 to 40 db 30 to35 db ff Type ETL580 ETL580 Number of channels 1 2 Nominal bandwidth 4 KHz 8 KHz Max. line attenuation 63 db 57 db Pilot channel: Available frequencies Nominal frequency Receiver data RF sensitivity referred to the test tone level at the RF input: Automatic level regulation: Hz adjustable with MMI in 60 Hz steps 3840 Hz 30 dbm AF output level constant within 1 db at +14/ 26 db fluctuations of the RF receive level Due to line noise, the line attenuation should not exceed the following values 38 to 43 db 33 to 38 db Alarm outputs P4LQ alarm outputs R1BC alarm outputs Ambient conditions Normal operation complies with Climatic conditions IEC , class 3K5 Temperature range 5 to C Relative humidity 95% Reliable operation Mechanical conditions up to C complies with IEC , class 3M1 With hardware, link and cabinet alarm Normally closed (NC) or normally open (NO) contacts 8 relays, jumper programmable for cabinet alarm or software configurable alarms 1 or 2 with MMI500 Normally closed (NC) or normally open (NO) contacts 12

13 Telephone interfaces O4LE AF interface 2/4-wire PAX interface Transmission path: 2-wire nominal input level Input level range 4-wire nominal input level Input level range Speech limit frequencies Programmable in 200 Hz steps: Receive path: 2-wire nominal output level Output level range 4-wire nominal output level Output level range Remote subscriber PAX side interface Nominal input level Input level range Nominal output level Output level range Subscriber side interface Nominal input level Input level range Nominal output level Output level range Telecontrol interfaces O4LE AF interface Telecontrol inputs Max. 4 inputs Nominal input level Input level range Telecontrol outputs Max. 4 outputs 600 ohm balanced Nominal output level Output level range 0 dbm, 600 ohm balanced 17 dbm to +4 dbm 3.5 dbm, 600 ohm balanced 20 dbm to +4 dbm 2.0 khz khz 7 dbm, 600 ohm balanced 17 dbm to +1 dbm 3.5 dbm, 600 ohm balanced 20 dbm to +8 dbm 7 dbm, 600 ohm balanced 17 dbm to +1 dbm 0 dbm, 600 ohm balanced 17 dbm to +4 dbm 0 dbm, 600 ohm balanced 17 dbm to +4 dbm 7 dbm, 600 ohm balanced 17 dbm to +1 dbm decoupled, individually adjustable, 600 ohm, balanced 0 dbm 20 dbm to +4 dbm decoupled, level individually adjustable 0 dbm, 600 ohm balanced 20 dbm to +8 dbm Optional transit filter Number of filters 2 (4 without speech) Can be connected to telecontrol input telecontrol output Connection of external teleprotection signalling equipment Input /output data as for telecontrol I/O Input with level boosting Number of external teleprotection I/O 1 per channel Supply Type ETL505 ETL540 ETL540 Number of channels AC supply 115/230 V 115/230 V 115/230 V 50/60 Hz 50/60 Hz 50/60 Hz Power consumption AC Normal operation 160 VA 180 VA 190 VA Battery supply 48 VDC 48 VDC 48 VDC Power consumption DC Normal operation 110 W 125 W 135 W ff Type ETL580 ETL580 Number of channels 1 2 AC supply 115/230 V 115/230 V 50/60 Hz 50/60 Hz Power consumption AC Normal operation 235 VA 245 VA Battery supply 48 VDC 48 VDC Power consumption DC Normal operation 165 W 175 W Mechanical data Dimensions and weight Subrack 19 according to standard IEC and DIN P7LA power subrack 3 units high (1 unit = mm) P7LC channel subrack 6 units high Type ETL505 ETL540 ETL580 Modules Height 397 mm 533 mm 711 mm Width 482 mm 482 mm 482 mm Depth 350 mm 350 mm 350 mm Weight 16 kg 26 kg 38 kg 13

14 TECHNICAL DATA AMX500 AMX500 complies with European EMC Directive 89/336/EEC and the Low-Voltage Directive 73/23/EEC. System data Operating mode Bandwith Four-wire Max. line attenuation Point-to-point Four-wire frequency duplex 1.0 khz/1.4 khz/1.7 khz/2.1 khz 3.1 khz/3.3 khz/7.0 khz/7.3 khz Depends on transmission rate and bandwidth Signal converter Maximum data rate, synchronous Bandwidth 1.0 khz 8.8 kbps 1.4 khz 12.8 kbps 1.7 khz 15.2 kbps 2.1 khz 19.2 kbps 3.1 khz 28.8 kbps 3.3 khz 28.8 kbps 7.0 khz 64 kbps 7.3 khz 64 kbps Alarm criteria Loss of modem synchronization, block error rate > 10-3 activates alarm Alarm outputs Collective alarm 1 changeover contact Max. contact load 30 W/150 VDC /1A 60VAC/125VAC/1A Ambient conditions Operation Temperature and humidity Mechanical Storage Temperature Mechanical Transport Temperature Mechanical IEC Class 3K5 IEC Class 3M1 IEC Class 1K5 IEC Class 1M1 IEC Class 2K5 IEC Class 2M1 Electromagnetic compatibility Complies with the EMC requirements for: Emission EN (EN class A) Immunity EN Electrical Safety Complies with the safety IEC requirements according to EN Permits maximum utilization of available channel capacity with changes in transmission charac- teristics. Automatic data rate adjustment Fall-back, fall-forward mechanism Data formats RS-232 RS-422/V.11, X.21 Serial data interface Line interface, four-wire Max. transmission level, average power I/O impedance Suppression of outer band signals Receive sensitivity, average power Line interface, two-wire Max. transmission level, average power I/O impedance Suppression of outer band signals Receive sensitivity, average power The data rates achievable in practice are dependent on the actual channel characteristics (line interference characteristic, noise ratio, distortions). synchronous mode, clock from DCE or DTE asynchronous mode, all standard formats anisonchronous mode, transparent transfer of low-speed data synchronous mode, clock from DCE RS-422/V.11, X.21, RS dbm 600 ohm, balanced 40 db 30 dbm 0 dbm 600 ohm, balanced 40 db 30 dbm 14

15 Multiplexer Number of data channels Data rate Individually adjustable for each channel Each channel can be used for data or for speech/fax transmission Data formats RS per module aggregate data rate 64 kbps 1200 to bps synchronous mode, clock from DCE or DTE asynchronous mode, all standard formats anisonchronous mode, transparent transmission of low-speed data Speech interface 4-wire Transmit level Standard Receive level Standard Speech interface 2-wire Transmission level Standard Receive level Standard Service interface for PC connection 600 ohm, balanced 30 to +2 dbm 3.5 dbm 30 to +2 dbm 3.5 dbm 600 ohm, balanced 30 to +2 dbm 0dBm 30 to +2 dbm 7.0 dbm Sub-D plug connector 9-pole RS-422/V.11, X.21 synchronous mode, clock from DCE PC Software For configuration, parameter setting, alarm and status interrogation Serial data interface galvanically isolated RS-422/V.11, X.21, RS-232 Supply RS-232 RS-422/V.11, X pole plug connector with cable to Krone 15-pole plug connector with cable to Krone Battery supply Insulation voltage Input voltage range Power consumption galvanically isolated 2 kv rms, 1 min V 60 W Speech-/FAX module Mechanical data Vocoder FAX recognition Compression algorithms LPC, P-CELP, Multipulse Recognition and detection algorithm Bit rate for speech 2400, 4800, 7200, 8000, 9600, transmission , bps Subrack 19 Width: mm Height: mm Depth: 291 mm Weight: subrack fully equipped: 6 kg Bit rate for FAX transmission 2400, 4800, 7200, 9600 bps Operating modes Four-wire PABX-PABX mode with E&M status signalling and DTMF signalling for dialling transmission Remote subscriber Two-wire connection of a remote subscriber from a local PABX Point-to-point connection (Hot-line mode) Service telephone Service telephone mode with direct call from station to station. The other modes have priority FAX transmission Modifications or deviations which are due to technical progress are reserved. 15

16 ABB Switzerland Ltd Utility Automation Systems Brown Boveri Strasse 6 CH-5400 Baden/Switzerland Phone or (Call Center) Fax e. Mail utility.communication@ch.abb.com 1KHA SEN Printed in Switzerland