Watlow CLS - Manual (Page 17)

Introduction
CLS User’s Guide 9
Digital Inputs
Number: 8
Configuration: 8 selectable for output override, remote job selection.
Input Voltage Protection: Diodes to supply and common. Source must
limit to 10 mA for override conditions.
Voltage Levels: <1.3V=Low; >3.7V=High (TTL).
Maximum Switch Resistance to Pull Input Low: 1 Kohms.
Minimum Switch Off Resistance: 11 Kohms.
User-Selectable Digital Outputs
Number: 34
Operation: Open collector output; On state sinks to logic common.
Current
≤
20 mA for 35 loads. Single load
≤
40 mA. I total
≤
700 mA.
Function: Selectable as PID control or alarm/control.
Number of PID Control Outputs per PID Loop: 2 (max)
PID Control Output Types: Time Proportioning, Distributed Zero
Crossing, SDAC, or On/Off
— all independently selectable for each
output. Heat and cool control outputs can be individually disabled for
use as alarm outputs.
Time Proportioning Cycle Time: 1-255 seconds, programmable for
each output.
PID Control Action: Reverse (heat) or direct (cool), independently
selectable for each output.
Off State Leakage Current: <.01 mA to DC common.
System Digital Outputs
System Digital Outputs: 1 Global Alarm, 1 CPU watchdog.
Operation: Open collector output; On state sinks to logic common.
Current
≤
20 mA for 35 loads. Single load
≤
40 mA. I total
≤
700 mA.