Direct Digital Control of package units, VAV boxes, and other terminal unit applications. The TCX 840

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Infinity TCX 840, 843, 845, 846 Terminal Control Unit F E A T U R E S The Infinity TCX 840 family of intelligent, programmable stand-alone controllers offers versatility in Direct Digital Control of

1 Infinity TCX 840, 843, 845, 846 Terminal Control Unit F E A T U R E S The Infinity TCX 840 family of intelligent, programmable stand-alone controllers offers versatility in Direct Digital Control of package units, VAV boxes, and other terminal unit applications. The TCX 840 series (TCX 840, TCX 843, TCX 845, and TCX 846) features several combinations of universal inputs, an on-board pressure transducer, Form A and Tri-state outputs, and analog outputs for flexible control configurations. Choose the TCX 840 model with the I/O configuration that meets your specific control needs. The basic two-output TCX 840 model provides low-cost cooling-only VAV control. The TCX 843, with three additional outputs, is perfect for VAV applications requiring reheat control. The TCX 845 and TCX 846 are full-featured models. With separate outputs for fan and staged heating and cooling control plus additional analog outputs for economizer control, the TCX 845 and TCX 846 provide the perfect solution for package unit control. Metal oxide varistors and optocouplers provide 2500V isolation on each triac-based output on all TCX 840 models to ensure noise-free operation and, in most cases, eliminate the need to install MOVs in the field. Versatile DDC from Simple VAV to Full-Featured Package Unit Applications Universal Inputs for Flexible Control Configurations Peer-to-Peer Communications Provide Transparent Data Transfer Plain English Language Simplifies Programming Form A and Tri-State Outputs for On/Off and Bidirectional Control On-Board Pressure Transducer for Airflow Measurement Analog Outputs for Precise Control of Valves and Dampers The Infinet s true peer-to-peer communications protocol provides the Infinity TCX 840 series with the ability to instantly communicate with an Infinity network controller such as the CX 9200, as well as the Built-in Varistors for Noise Suppression entire network of Andover Infinet field controllers. Up to 254 TCX 840 series controllers can be networked to one CX series network controller.

2 Infinity TCX 840, 843, 845, 846 Terminal Control Unit COMMUNICATIONS Communication to the Infinity TCX 840 series is handled via the Infinet bus, a twisted pair, half duplex RS-485 interface. Communication is accomplished with a token passing protocol which provides full transparent data transfer between all Infinity controllers on the network. INPUTS Input configuration consists of either two or four Universal inputs that accept voltage, (0-5 VDC), digital (on/off), counter signals (up to 4 Hz), or temperature signals. The TCX 840, 843, and 846 also provide an on-board airflow sensor. OUTPUTS The TCX 843, 845, and 846 contain 5 Form A, triac-based outputs for on/off or pulsed control of lighting, heat, and fan units. Adjacent outputs can also be configured up to two Tri-state outputs, providing bidirectional control of dampers and valves. The TCX 845 and the TCX 846 also feature two analog outputs each to control devices, such as valves, dampers, etc. The basic TCX 840 model provides two Form A outputs configurable as a single Tri-state output for reduced I/O applications, such as cooling-only VAV control. PROGRAMMING Every TCX 840 series controller can be configured to meet the exact distributed control requirements of your application using Andover Controls powerful Plain English TM programming language. Programs are entered into an TCX 840 using an SX 8000 workstation, the LSX 280 Lap-Top Service Tool, or network controller. The program is then stored in, and executed by, the TCX 840. The on-board lithium battery keeps programs backed up in the event of a power failure. Programming multiple TCX 840s is inherently easy with Plain English. A complete copy of one TCX 840 s programs can be loaded directly into other TCX 840s without changing any point names or programs. The SX 8000 workstation makes this process even easier with its unique drag-and-drop feature. SOFTWARE CAPABILITIES The dynamic memory of the TCX 840 can be allocated for any combination of Plain English control programs, scheduling, alarming, and data logging. Our object-oriented language with intuitive keywords provides easy operation and programming. In addition, Plain English s pre-defined and customized functions and powerful math capabilities reduce programming time particularly for repetitive applications.

3 TCX 840 Dimensional Drawing

4 S P E C I F I C A T I O N S ELECTRICAL Power: Power Consumption: Overload Protection: Real-Time Clock: 24 VAC, 50/60 Hz Note: Individual transformer at each controller required (not included). 15 VA Fused with 2 amp pico fuse. MOV protected. TCX 840, 843: Software real-time clock synchronized through Infinet by CX or CMX Network Controller. TCX 845, 846: Battery-backed quartz clock, synchronized through Infinet by CX or CMX Network Controller. MECHANICAL Operating Environment: Size: Weight: F (0-60 C), 10-95% RH (non-condensing) 8.50 H x 7.13 W x 1.06 D (215.9 H x W x 26.92)mm 1.0 lbs (.454 kg) Enclosure: UL open class sheet metal, IP 10 BATTERY Battery Backup: Replaceable non-rechargeable, lithium battery. Provides 3 years typical accumulated power failure backup of RAM memory and real-time clock. Connector provided for external battery. COMMUNICATIONS Communications Interface: Communications Speed: Bus Length: Bus Media: Through Infinity CX or CMX Network Controllers or LSX 280 Service Tool to 19.2k baud 4,000 ft. (1,220m) standard for Infinet, InfiLink amplification module allows extension to longer distances and is required after every group of 32 units on the network. Infinet: twisted, shielded pair, approved low capacitance cable Comm. Error Checking: International Standard CRC 16

5 S P E C I F I C A T I O N S (Cont'd) INPUTS TCX 840 TCX 843 TCX 845 TCX 846 Input Voltage Range: 2 Universal inputs: Temperature -30 F to 230 F (-34 C to 110 C), Digital (on/off), Counter (up to 4Hz at 50% duty cycle, 125 ms. minimum pulse width), Voltage ( VDC) 1 airflow sensor (0 to 1 W.C.) 2 Universal inputs, 1 airflow sensor 4 Universal inputs 4 Universal inputs, 1 airflow sensor volts DC Input Impedance: 10k ohm to 5.120V Input Protection: Input Resolution: Input Accuracy: 24VAC or 24VDC indefinitely on any single channel, ± 1000V transients (Tested to IEC 801-4) 5.0 mv ± 15 mv (± 0.56 C from -23 C to +66 C or ± 1 F from -10 F to +150 F) Airflow Input (TCX 840, 843, 846): Range: 0 to 1" WC (0-249 Pa) Resolution: 0.005" WC ( C (73 F) Accuracy: ± 0.05" WC ( C (73 F) OUTPUTS TCX 840 TCX 843 TCX 845 TCX Form A, triac-based outputs (can be configured as 1 Form K Tri-State output) 5 Form A, triac-based outputs (can be configured up to 2 Form K Tri-State outputs) 5 Form A, triac-based outputs (can be configured up to 2 Form K Tri-State outputs); 2 analog outputs (0-10V) 5 Form A, triac-based outputs (can be configured up to 2 Form K Tri-State outputs); 2 analog outputs (0-10V) Output Rating: For SPST: Maximum: 1 A, 24 VAC, ± 1000 volt transients (Tested according to IEC 801-4) Minimum: 30 MA AC Optically-isolated triac outputs For 0-10V: 5 ma maximum, 2K Ohm minimum impedance, ± 1000 volt transients (Tested according to IEC 801-4) Accuracy: For SPST: 0.1 sec. for pulse width modulation For 0-10 V: 50 mv resolution/100mv accuracy Specifications continued on back page

6 S P E C I F I C A T I O N S (Cont'd) CONNECTIONS Power: Male Spade (.250) Inputs: Male Spade (.250) Outputs: Male Spade (.250) Infinet Bus: Three-position barrier strip GENERAL Memory: 128K EPROM, 32K RAM, 128 bytes EEPROM MODELS TCX Universal Inputs; 1 Airflow; 2 Form A Outputs (or 1 Form K) TCX Universal Inputs; 1 Airflow; 5 Form A Outputs (or 2 Form K) TCX 845 TCX Universal Inputs; 5 Form A Outputs (or 2 Form K); 2 Analog Outputs 4 Universal Inputs; 1 Airflow; 5 Form A Outputs (or 2 Form K); 2 Analog Outputs AGENCY LISTINGS UL/CUL 916, FCC, CE Andover Controls Corporation World Headquarters 300 Brickstone Square Andover, Massachusetts USA Tel: Fax: Andover Controls Ltd. Smisby Road Ashby-de-la-Zouch Leicestershire LE65 2UG England Tel: Fax: Andover Controls GmbH Am Seerhein 8 D Konstanz, Germany Tel: Fax: Andover Controls S.A. 93 avenue de Fontainebleau Le Kremlin-Bicetre Tel: Fax: Andover Controls Asia 707 Chinachem Golden Plaza 77 Mody Road, Tsimshatsui East Kowloon, Hong Kong Tel: Fax: U.S. Patent # Andover Controls Corporation. Data subject to change without notice. Consult Andover Product Installation Guides for exact installation instructions and specifications. #DS-TCX840-C

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