Automated Logic R683 Technical Instructions - Page 2

Browse online or download pdf Technical Instructions for Control Unit Automated Logic R683. Automated Logic R683 16 pages. Rlm v4.7

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Introduction

The R683 is a DDC module designed specifically for

controlling rooftop air handling units. The module can

be mounted directly in or on the rooftop equipment. A

single board provides the power circuitry,

microprocessor, and non-volatile memory. The R683

module has 6 digital outputs, 8 universal inputs, and 3

analog outputs.

The R683 module is a member of the I/O Hardware family

of control modules. Each module is capable of stand-

alone operation. All modules communicate with equal

authority on a "peer-to-peer" EIA-485 Control Module

Network (CMnet). A direct access port is provided for

diagnostic operations.

The R683 module can store a single Graphic Function

Block (GFB).

Rev. (30-JAN-98) • RLM v4.7

Figure 1: R683 Front and Side View Dimensions

Power: 24 VAC, 50-60 Hz, 20 VA (0.83 A) maximum.

Inputs: One enhanced zone sensor port and 8 universal

inputs (thermistor/dry contact, 0-5 VDC, or 4-20 mA).

Digital Outputs: 6 relay outputs (Form A), 3 A max.

Analog Outputs: 3 analog outputs (0-10 VDC),

20 mA source capability.

Communication: EIA-485 port for CMnet

communication.

Baud rate: 9600 bps or 38.4k bps

(switch selectable). CMnet terminals are optically

isolated.

Status Indication: LED indicators for visual status of

communication, errors, running, and all outputs.

Memory: 32k byte non-volatile read/write memory.

Protection: Noise immunity provided by metal cover

plate, surge protection on network, inputs, and power

lines, arc suppression on relays.