2 control capability, 3 digital outputs, 4 digital inputs – Watlow 12LS Controller User Manual
Page 13: 5 serial interface, 6 power supply
2-2
2.2 Control Capability
Number of Loops:
12, Dual Output.
Control Outputs:
Cycle Time Proportioning, Distributed Zero Crossing, or On/Off;
all independently selectable for each loop.
Control Action:
Reverse [heat] or Direct [cool], independently selectable for each
loop.
Digital Control Outputs:
Nominal 5vdc at 10ma to driveoptically- isolated solid-state relays.
Cycle Time:
Programmable foreach loop, 1-255 secs.
Output Resolution:
16 bits.
2.3 Digital Outputs
Number:
11
Configuration:
1 Global Alarm
9 for alarms or events.
1 not used standard PROM
2.4 Digital Inputs
Number:
9
Configuration:
8 for triggers
1 not used standard PROM
2.5 Serial Interface
Type:
RS-232 or RS-485 4 wire, factory select
Isolation:
RS-232: None.
RS-485: To RS-485 Specification.
Baud Rate:
2400 or 9600, menu selectable.
Protocol:
Form of ANSI X3.28-1976, Compatible with Allen-Bradley PLC,
Half Duplex.
Error Check:
BCC or CRC, menu selectable.
Number of Controllers:
Each communications line: 32 with RS- 485, 1 with RS-232.
2.6 Power Supply