Infinity SCX 920 System Controller The Infinity SCX 920 is a stand-alone, programmable, microprocessor-based system controller that F E A T U R E S F E A T U R E S F E A T U R E S F E A T U R E S F E A T U R E S is used for Direct Digital Control of chillers, cooling towers, boilers, air handling units, perimeter • Stand-alone DDC for System radiation, lighting, etc. The Infinet’s true peer-to-peer communication protocol provides the Infinity Reliability SCX 920 with the ability to instantly communicate with Infinity network controllers such as the CX  Peer-to-Peer Communications 9200, as well as the entire network of Andover Infinity controllers. Up to 254 SCX 920s can be Provide Transparent Data Transfer networked with the Infinity CX family of controllers. ®  Plain English Language The SCX 920 comes standard with a metal cover plate suitable for panel mounting (shown). Simplifies Programming An optional enclosure is available for wall mounting.  Universal Inputs and Outputs for Flexible Control Configurations COMMUNICA TIONS Communication to the Infinity SCX 920 is handled via the Infinet bus, a twisted pair, half duplex RS-485 interface.  Expandable I/O Meets Additional Communication is accomplished with a token passing protocol which provides full transparent data transfer between all Point Count Needs Infinity controllers on the network.  Detachable Input/Output INPUTS Connectors for Easy Installation The Infinity SCX 920 is capable of sensing sixteen inputs. Each input can accept a digital (on/off), counter (up to 4 Hz), voltage (0-10 VDC), or temperature signal.  Full Function Manual Overrides Provide Status Feedback OUTPUTS  Optional Display/Keypad for Local The Infinity SCX 920 has eight Universal outputs providing pulse, variable voltage (0 - 20 VDC), variable current, (0 - 20mA) Information Control or on/off control of motors and lighting with Form C relays. In addition, two Form C relays can be combined in software to provide a Tri-State output, for bidirectional control of motors and actuators.  Replaceable Battery Provides Back-Up For 7 Years Accumulated Power Failure of RAM and Real- I/O EXP ANSION Time Clock The SCX 920 contains an I/O expansion port for the addition of low-cost I/O modules directly onto the bottom of the controller. The family of modules includes the EMX 140 (two pneumatic outputs), the EMX 150 (two analog outputs), and the EMX 160 (eight digital inputs), etc. Infinity SCX 920 SCX 920 SCX 920 SCX 920 SCX 920 System Controller PROGRAMMING Every SCX 920 can be configured to meet the exact distributed control requirements of your application using Andover Controls’ powerful Plain English™ programming language. Programs can be activated within individual SCX 920s or any network controller. Programs are entered into an SCX 920 using an SX 8000 workstation, LSX 280 Lap-Top Service Tool, or network controller. The program is then stored in, and executed by, the SCX 920. SOFTW ARE CAP ABILITIES The dynamic memory of the SCX 920 can be allocated for any combination of Plain English programs, scheduling, alarming, reporting 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 for repetitive applications. LOCAL DISPLA Y WITH KEYP A D An optional 2 x 16 character liquid crystal display provides for local viewing of point values and setpoint modifications in the SCX 920. SCX 920 Dimensional Drawing S P E C I F I C A T I O N S ELECTRICAL Power: 24 /120/ 240 VAC, 50/60 Hz Power Consumption: 32 VA Overload Protection: Fused with 3 A 3AG fuse. MOV protected. Real-time Clock: Battery-backed real-time clock. MECHANICAL Operating Environment: 32–120 ½°F (0–49°C), 10–95% RH (non-condensing) 32–104°F (0– 40°C) w/display option Size: 14 11/16"H x 10 11/16"W x 3 3/16"D (373.1H x 271.4W x 81.0D)mm (no enclosure) 19"H x 15"W x 4 3/4"D (482.6H x 381.0W x 120.6D)mm (with enclosure) Weight: 7.0 lbs. (3.1 kg) (no enclosure) 21 lbs. (9.5 kg) (with enclosure) Enclosure Type: UL open class, IP 10 Optional NEMA 1-style enclosure, flammability rating of UL94-5V, IP 20 BATTERY Battery Back-up: Replaceable, non-rechargeable, lithium battery. Provides 7 years typical accumulated power failure backup of RAM memory and real-time clock. COMMUNICATIONS Communications Interface: Through Infinet field bus to CX or CMX Network Controller or Lap-Top Service Tool. Communications Speed: 300 to 19.2k bps Bus Length: 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. Bus Media: Infinet: twisted, shielded pair, approved, low capacitance cable Comm. Error Checking: International Standard CRC 16 INPUTS/OUTPUTS Inputs: 16 Universal: digital (on/off), counter (up to 4 Hz at 50% duty cycle), voltage (0-10 VDC), or temperature ( -30– +230½°F) (-34–110 °C) S P E C I F I C A T I O N S (Cont'd) S P E C I F I C A T I O N S (Cont'd) S P E C I F I C A T I O N S (Cont'd) S P E C I F I C A T I O N S (Cont'd) S P E C I F I C A T I O N S (Cont'd) INPUTS/OUTPUTS Cont'd Input Voltage Range: 0-10 VDC Input Impedance: 10 KΩ minimum with pull-up disabled Input Protection: Each input can withstand continuous shorting to 120 VAC/DC or up to ±1500 volt transients (24 VAC/DC on SCX 920S) Input Resolution: 2.5 mV Input Accuracy: ±5 mV (±.0.46½F over range -10–150) (±0.26°C over range -23.3–65.5°C) Outputs: 8 Universal software-configurable outputs. Each output configurable as Form C relay, 0-20 mA, 0-20 V or Tri-State. (Tri-State outputs use 2 Form C relays). Output Rating: 5 A, 24 VAC (Form C/Tri-State), 0-20 mA into maximum 750Ω, 0-20 VDC into minimum 4000Ω, ±1500 V transients. Output Resolution: 0.1 sec. for Form C/Tri-State, 0.1mA for 0-20mA output, and 0.1 V for 0-20 V output. Andover Controls Corporation World Headquarters Overrides: Each output is equipped with an HOA switch for manual control of the Form C or 300 Brickstone Square Andover, Massachusetts 01810 USA Tri-State relay, and an override potentiometer for manual control of the 0-20 mA, Tel: 978 470 0555  Fax: 978 470 0946 and 0-20 VDC output signals. http://www.andovercontrols.com Andover Controls Ltd. Expansion Bus: Interfaces to optional I/O expansion modules Smisby Road Ashby-de-la-Zouch Leicestershire LE65 2UG England Tel: 01530 417733  Fax: 01530 415436 Andover Controls GmbH CONNECTIONS Am Seerhein 8 D-78467 Konstanz, Germany Power: Three-position barrier strip Tel: 07531 99370  Fax: 07531 993710 Andover Controls S.A. Outputs: Removable two-piece terminal strip Immeuble Dolomites 2 58 Rue Roger Salengro Inputs: Removable two-piece terminal strip 94126 Fontenay Sous Bois Cedex, France Tel: 331 53 99 16 16  Fax: 331 53 99 16 15 Infinet Bus: Removable two-piece terminal strip Andover Controls Asia Unit 1201-02, Phase I, Cheuk Nang Centre 9 Hillwood Road, Tsim Sha Tsui GENERAL Kowloon, Hong Kong Tel: 852 2739 5497  Fax: 852 2739 7350 Memory Size: 128K EPROM, 64K RAM, 128 Byte EEPROM Andover Controls Mexico Insurgentes Sur 1722-501 Col. Florida Mexico D.F. 01030, Mexico AGENCY LISTINGS UL/CUL 916, 1076 (SCX 920S), FCC, CE Tel: 525 661 56 72  Fax: 525 661 54 15 U.S. Patent #4591967 ©2000 Andover Controls Corporation. OPTIONS Data subject to change without notice. Consult Andover Product Installation  2 x 16 Character Liquid Crystal Local Display Guides for exact installation instructions and specifications. All brand names,  NEMA 1-Style Enclosure (for Wall Mounting) trademarks and registered trademarks are  UL-864, UUKL Compliance (SCX 920S) the property of their respective holders. #DS-920-C