Automated Logic RC642 User Manual

3
BACnet support Conforms to the Advanced Application Controller (B-AAC)
Standard Device Profile as defined in ANSI/ASHRAE
Standard 135-2004 (BACnet) Annex L
Listed by UL-916 (PAZX), cUL-916 (PAZX7), FCC Part 15-Subpart B-
Class A, CE EN50082-1997
The Room Controller has 4 inputs that accept the signal types described below.
These
inputs...
Support this
signal type...
Description
All inputs Thermistor Precon type 2 (10 kOhm at 77°F). Input voltages should
be from 0.489 Vdc to 3.825 Vdc for thermistors.
All inputs Dry contact A 5 Vdc wetting voltage detects contact position,
resulting in a 0.5 mA maximum sense current when the
contacts are closed.
Input 3
Input 4
0–5 Vdc The output impedance of a 0–5 Vdc source must not
exceed 10 kOhms. The input impedance of the Room
Controller is approximately 1 MOhm.
All inputs Pulse counter* Pulse counting up to 10 pulses per second.
Minimum pulse width (on or off time) required for each
pulse is 50 msec.
All inputs Timed local
override
A momentary contact switch that overrides a schedule
and turns equipment on for a defined period of time. The
override time added for each push of the button and the
maximum allowable On time are software adjustable.
* The Room Controller can perform pulse counting for dry contact or voltage inputs if you assign
the input to a Pulse to Analog Input microblock. See To assign inputs or outputs to points (page
17).
NOTE The Room Controller has a built-in room temperature sensor (Input 6) that is read
by an RS Zone Sensor microblock. You must use a BACview to calibrate the temperature
sensor in a stand-alone Room Controller. See:
Appendix C - Editing properties in a built-in control program (page
86)
Creating a custom control program (page 6)
The Room Controller has 6 digital outputs. These outputs are small pilot relays that drive
external 24 Vac relays/devices (or 26 Vdc, depending on the controller's power supply).
Each output is a wet contact rated at 1 A maximum and is normally open.
The Room Controller has 2 analog outputs that support voltage devices from 0-10 Vdc.
The controlled device must have a minimum of 1000 Ohms resistance measured from its
input to ground and must share the same ground as the controller.
Inputs
Digital outputs
Analog outputs

Automated Logic RC642 Specifications

General

Brand	Automated Logic
Model	RC642
Category	Controller
Language	English