Watlow 12LS Controller User Manual
Page 23
3-9
REMOTE TERMINAL BLOCK CONNECTIONS
The remote terminal block (RTB) provides the control outputs and additional digital inputs and outputs as follows:
|------------------------------------------------------------|
¦ FUNCTION
¦ TERMINAL
¦ FUNCTION ¦
|------------------------------------------------------------¦
¦ +5VDC
¦ 1 ¦ 2
¦ +5VDC ¦
¦ CTRL COM
¦ 3 ¦ 4
¦ CTRL COM ¦
¦SPARE
¦ 5 ¦ 6
¦ SPARE ¦
¦SPARE
¦ 7 ¦ 8
| BOX SELECTED
¦
¦ PIDHEAT 1
¦ 9 ¦ 10
¦ GLOBAL ALARM
¦
¦ PIDHEAT 2
¦ 11 ¦ 12
¦ DIG OUTPUT 9
¦
¦ PIDHEAT 3
¦ 13 ¦ 14
¦ DIG OUTPUT 8
¦
¦ PIDHEAT 4
¦ 15 ¦ 16
¦ DIG OUTPUT 7
¦
¦ PIDHEAT 5
¦ 17
¦ 18
¦ DIG OUTPUT 6
¦
¦ PIDHEAT 6
¦ 19
¦ 20
¦ DIG OUTPUT 5
¦
¦ PID HEAT 7
¦ 21 ¦ 22
¦ DIG OUTPUT 4
¦
¦ PIDHEAT 8
¦ 23 ¦ 24
¦ DIG OUTPUT 3
¦
¦ PIDHEAT 9
¦ 25
¦ 26
¦ DIG OUTPUT 2
¦
¦ PIDHEAT 10
¦ 27
¦ 28
¦ DIG OUTPUT 1
¦
¦ PIDHEAT 11
¦ 29 ¦ 30
¦ PID COOL 12 ¦
¦ PIDHEAT 12
¦ 31
¦ 32 ¦ PID COOL 11
¦
¦ PIDCOOL 1
¦ 33
¦ 34
¦ PID COOL 10 ¦
¦ PIDCOOL 2
¦ 35 ¦ 36
¦ PID COOL 9 ¦
¦ PIDCOOL 3
¦ 37
¦ 38
¦ PID COOL 8 ¦
¦ PIDCOOL 4
¦ 39
¦ 40
¦ PID COOL 7 ¦
¦ PID COOL 5
¦ 41 ¦ 42
¦ PID COOL 6 ¦
¦ DIG INPUT 1
¦ 43 ¦ 44
¦ DIG INPUT 2 ¦
¦ DIG INPUT 3
¦ 45
¦ 46
¦ DIG INPUT 4 ¦
¦ DIG INPUT 5
¦ 47
¦ 48
¦ DIG INPUT 6 ¦
¦ DIG INPUT 7
¦ 49 ¦ 50
¦ DIG INPUT 8 ¦
|------------------------------------------------------------|
WARNING
All digital outputs and PID outputs on this flat ribbon connection are SINK OUTPUTS. They are in reference
to the 5Vdc supply. The outputs will be low when they are ON.
All digital inputs are TTL level inputs and may be selected from software if they will be high/false or low/true
inputs. The inputs are in reference to CTRL COM.
NOTE! WHEN USING THE RTB, PROPER POLARITY OF THE FLAT RIBBON CABLE IS
NECESSARY FOR CORRECT PIN TERMINATIONS. INSTALL THE RED MARKER INDICATING
PIN #1 TO THE LEFT WHEN TERMINAL #1 OF THE RTB IS TO THE LEFT. THE FLAT RIBBON
CABLE SHOULD HAVE THE RED MARKER TO THE LEFT WHEN IT IS INSTALLED ON THE
REAR OF THE 12LS. TO CONFIRM PROPER POLARITY, CHECK THAT PIN #1 IS +5VDC WITH
RESPECT TO PIN #3.