Accessories Power Amplifiers

Transcription

1 Front Panel Vickers Models with Command Logic Module and Ramps EEA-PAM-5**-B- Series General Description Features and Benefits The EEA-PAM-5**-B- Eurocards are power amplifiers with a four-input (demand signal) module and ramp function generator with quadrant detection for separate adjustment of acceleration and deceleration. The type of EEA-PAM-5**-B- amplifier used depends on the type of proportional valve, see Model Codes on next page. Accessories Power Amplifiers Includes all features of A amplifiers ramp times set by front-panel potentiometers; can be varied by external voltage signals adjustable command pre-sets selectable by V logic signal Polarity of 0V reference voltage selectable by V logic signal s [] V power supply input, green [] 5V control supply output, green [] Drive (solenoid) enabled, yellow [] Overload, red [5] LVDT failure, red [6] Drive to solenoid, yellow s [7] Deadband compensation, flow from port P to B [8] Deadband compensation, flow from port P to A [9] Ramps enabled, yellow s [0] Spool acceleration, flow from port P to B or A [] Spool deceleration, flow from port P to B or A P B A /5 + s [5] Positive input polarity ON, yellow [6] Negative input polarity ON, yellow [7] Input ON, yellow [8] Input adjustment [9] Input ON, yellow [0] Input adjustment [] Input ON, yellow [] Input adjustment [] Input ON, yellow Monitor points [] Conditioned command signal [] Common ground 0V [] t t [] Input adjustment and symbol not on EEA-PAM-5/5/55 amplifiers. Main-stage spool in the case of K*DG5V valves. In the case of EEA-PAM-5/55 amplifiers, one of these relationships may not apply if two single solenoid valves are connected. Of solenoid current in the case of EEA-PAM-5/5/55 models, of spool position for others. Ø,0 mm (0.0787dia.) sockets. This product has been designed and tested to meet specific standards outlined in the European Electromagnetic Compatibility Directive (EMC) 89/6/EEC, amended by 9/6/EEC, 9//EEC and 9/68/EEC, article 5. For instructions on installation requirements to achieve effective protection levels, see this leaflet and the Installation Wiring Practices for Vickers Electronic Products leaflet 68. Wiring practices relevant to this Directive are indicated by Electromagnetic Compatibility (EMC). January 996 GB-7

2 Model Codes Amplifier model EEA-PAM-5-B- EEA-PAM-5-B- EEA-PAM-55-B- EEA-PAM-5-B- EEA-PAM-55-B- EEA-PAM-56-B- EEA-PAM-568-B- EEA-PAM-57-B- EEA-PAM-58-B- Operating Data For valves KCG-; KCG-6/8 KX(C)G-6/8 K*GV-; KDG5V-5/7/8 K*GV-5 KF*GV- KF*GV-5 KFDG5V-5/7 KFDG5V-8 CVU-**-EFP KHDG5V-5/7/8 With type H coils only Power requirements See appropriate base amplifier, e.g. for EEA-PAM-55-B- see EEA-PAM-55-A- Control (output) supplies +5V for LVDTs only Output voltages for control: At pin z At pin b At pins z and b Command signal inputs: Direct-voltage pins b8, b6, z8, b0 Inverting-voltage pin z0 Voltage range Input impedance (voltage) 0V 7 kω Current pin z6 Current range Input impedance (current) 0 ma 00Ω Command voltage source d0 0V x 0 ma Command voltage polarity selection: For flow from (main) port P to A For flow from (main) port P to B Input impedance Warning: Loss of signal at pin d causes polarity reversal and possible erratic motion. In the case of EEA-PAM-5/55 amplifiers, one of these relationships may not apply if two single-solenoid valves are connected. Logic inputs: Switch-on voltage +0 to +0V Switch-off voltage <+5V Input current d0, d, d or d8 0 ma Command voltage inputs: d, d, d6 and d8 Voltage and source Input impedance External command potentiometer +0V (%) x 5 ma 0V (%) x 5 ma Ripple <0 mv pk.-to-pk. Temperature drift < mv/c (<0,5 mv/f) thru 0-50C (-F) range All outputs short-circuit protected Pin d at 0 to +5V Pin d at +0 to +0V 7 kω +0V gives valve flow from port P to B, or 0V gives flow from P to A Four 50 kω pots 5 kω; 0,5W minimum Part no. 77; see catalog 60 Not applicable when using EEA-PAM-5/55 amplifiers to drive two single-solenoid valves. Continued on next page

3 Voltage-controlled ramp generator: Acceleration pin Deceleration pin Input impedance d6 d8 d6 or d8 Drive enabled (power available to solenoid) z Apply >9,8V to <0V (kω) Drive disabled (no power to solenoid) z Apply open circuit or up to,5v Alarm output: Set alarm Signal Reset after failure Ramps enabled (valve switching rate limited by ramp potentiometers) b Apply >9,8V to <0V ( kω) Ramps disabled (fastest valve switching; ramp circuit bypassed) b Apply open circuit or up to,5v Ramp active indicator: Drive ramping up Drive ramping down Drive not ramping Output resistance Drive signal zero indicator: Drive signal at null (within deadband limits) Drive active Output resistance Ambient temperature range Storage temperature range Edge connectors Installation dimensions and panel display Mass Other characteristics Installation and start-up guidelines (supplied with product) Installation wiring requirements for Vickers electronic products Application notes (available on request) Supporting products: Power unit options Electronic accessories Portable test equipment z b b0 0V 0V Note: At any ramp pot. setting, positive voltages increase ramp times and negative voltages decrease them. With pot. set at zero, 0 to +0V equates to a ramp time range of 50ms to 5s. With pot. set at max., 0 to 0V equates to a ramp time of 5s to 50 ms. 0 kω Enable amplifier (on pin z) when switching power on HIGH when alarm is activated Output = Supply minus V I = 50 ma max. LOW when solenoid overload has occurred. (Maintained until reset.) Output = 0 to volts Output resistance = 50 ohms Disable and re-enable on pin z Output >0V Output <0V Output 0V (V ripple) 0 kω Output = Supply minus,5v I = 50 ma max. Output = 0 V 50Ω 0 to 50C ( to F) 5 to +85C ( to +85F) DIN 6 F8 male type on board. Mating connector must be an F8 female type Dimensions are the same as for the corresponding base amplifier but the panel display is different; see first page 0,0 kg (0.88 lb) approx. See catalog 6 for the relevant base amplifier EEA-PAM-5**-A See catalogs: and 5

4 Circuit and Connections EEA-PAM-5**-B- Shown with command logic module. Individual ramp adjustments of spool acceleration and deceleration, independent of direction of movement, are on the base amplifier. Additionally, acceleration and deceleration can be controlled by variable voltage inputs to pins d6 and d8 respectively. The circuit here includes the essential characteristics of all amplifiers listed in the Model Codes section, two pages back; actual amplifiers omit certain sub-circuits to those connection pins not needed for the valves concerned. Read circuit in conjunction with that for relevant base amplifier EEA-PAM-5**-A Inverting command input Signal 0V Ramps enable Close to enable Voltage-controlled ramp generation Acceleration Deceleration Command voltage polarity selection Logic inputs : see table on next page z b z6 b6 b8 b0 z8 z0 bz b +0V x 5 ma 0V x 5 ma +5V +0V 0V 5V Command logic module d6 d8 d d0 d d d8 bz d8 Ramps enabled d6 d d 5V Acc. Dec. A B Deadband compensation +0V 0V + d0 Polarity switch Power 0V Dither LVDT failure PWM Pilot stage LVDT Main stage LVDT z Enabled Overload z Solenoid current bdz bdz0 b b0 z8 z6 b8 b6 b8 z8 +5V +5V z6 z V DC Power supply Ramps active indicator Drive signal zero indicator Close to enable Drive enabled Drive output status To solenoid To solenoid Command signal monitor points Monitor points External command potentiometer. R = 5 k : 0.5W minimum Command signal inputs On-board command voltage source Valve. Actual connections see table on next page. Customer s protective earth connection. Solenoid current for 5/55-B models; LVDT position for all others. On front panel. See under this heading in Operating Data table, on previous two pages.

5 Logic Selection Inputs Logic input pin Command pot. Secondary pin Voltage to pin d d0 bdz0 0 d bdz0 0 Valve flow } } d bdz0 0 d8 bdz0 0 In the case of EEA-PAM-5/55-B models, one of these relationships may not apply if two single-solenoid valves are connected. Solenoid and LVDT Connections for Proportional Valves } } Amplifier type EEA-PAM-5-B- EEA-PAM-5-B- EEA-PAM-55-B- EEA-PAM-5-B- EEA-PAM-55-B- EEA-PAM-56-B- EEA-PAM-568-B- EEA-PAM-57-B- EEA-PAM-58-B- Solenoid with LVDT and/or for flow P to B Solenoid without LVDT, or on pilot Pilot-stage LVDT, (black plug): Main-stage LVDT, (gray plug): valve Pin Pin Pin Pin Pin Pin Pin Pin z z6 Warning: Electromagnetic Compatibility (EMC) It is necessary to ensure that the valve is wired up in accordance with the connection arrangements shown in this leaflet. For effective protection, the user s electrical cabinet, the valve subplate or manifold and the cable screens should be connected to efficient earth (ground) points. The metal 7-pin connector part no. 999 should be used for the integral amplifier. In all cases, both valve and cable should be kept as far away as possible from any source of electromagnetic radiation such as cables carrying heavy current, relays and certain kinds of portable radio transmitters, etc. Difficult environments could mean that extra screening may be necessary to avoid the interference. 5

6 Installation Dimensions in mm (inches) Plug-in Unit of U Height, to IEC 97 rd angle projection DIN 6 F8 male connector. Mating connector must be an F8 female type. 7,9 (0.) M,5 x (0.) long collar screws supplied with panel for fixing z - pin row b - pin row d - pin row Components envelope,5 (0.), (.8) Model designation (0.) 8, (5.06) 8 (0.), (0.56) 00 (.9) (0.) 7,5 (0.9) 0, (.59) 7, (0.8) (0.55) 75, (6.9)