Watlow PPC-2000 - Manual (Page 262)

Chapter 7: Specifications PPC-2000 User’s Guide
234 Watlow Anafaze Doc.# 30002-00 Rev 2.3
Table 7.9 Control Specifications
* Additional I/O modules required.
Table 7.10 Counter/Frequency Input
Specifications
Table 7.11 Digital Input Specifications
Control Modes On/Off, P, PI, or PID
Number of Control Loops
48* programmable channels. Chan-
nels may be single or dual output
Control Outputs
Time proportioning, Distributed Zero
Crossing, On/Off or analog all inde-
pendently selectable for each loop.
Time Proportioning
Cycle Time
1 to 255 seconds
Control Action Reverse (heat) or direct (cool)
Alarm Outputs
Independently set high/low process
alarms and high/low deviation
alarms.
Tuning Auto or manual
Soft Input Update 1 sec.
Number 1
Maximum Frequency 10 kHz single-phase
Sample Rate 250 ms (4 Hz)
Voltage Levels <0.6 = Low; 3.8V = High
Max. Input Current
0.5mA from processor with
input at 0V
Input Resistance 6 kOhms Min.
Count Range 16 bits
Number 24**
Voltage Limiting and Protection 40Vdc
Voltage Levels <0.6 = Low; 3.8V = High
Max. Input Current
0.5mA from processor with
input at 0V
Max. Switch Resistance to Pull Input
Low
1 kOhm
Min. Switch Off Resistance 27 kOhm