Red Lion TCU - Manual (Page 8)

OUTPUT MODULES
TYPICAL CONNECTIONS
Relay:
Type: Form-C (Form-A with some models. See ordering information.)
Rating: 5 amps @ 120/240 VAC or 28 VDC (resistive load), 1/8 HP @ 120
VAC (inductive).
Life Expectancy: 100,000 cycles at maximum load rating.
(Decreasing load and/or increasing cycle time, increases life expectancy).
Logic/SSR Drive: Can drive multiple SSR Power Units.
Type: Non-isolated switched DC, 12 VDC typical
Drive: 45 mA maximum.
Triac:
Type: Isolated, Zero Crossing Detection
Rating:
Voltage: 120/240 VAC
Max. Load Current: 1 ampere @ 35°C
0.75 ampere @ 50°C
Min. Load Current: 10 mA
Off State Leakage Current: 7 mA max. @ 60 Hz
Operating Frequency: 20 to 400 Hz
Protection: Internal Transient Snubber, Fused
LOAD
A
B
C
POWER 5 AMPS
AT
240 VAC
RELAY
MODULE
DO NOT CONNECT
SSR
POWER
UNIT
LOAD
4
3
1
2
A
B
C
POWER
+12VDC
UNREG.
+
-
NOT
ISOLATED
LOGIC/SSR DRIVE
MODULE
POWER
120VAC
AT
1 AMP
120/240VAC
ISOLATED
A
B
C
RELAY OR
DEVICE
TRIAC
LOAD DO NOT CONNECT
TRIAC MODULE
APPLICATION
Several TCU controllers are
employed to control the temperature of
a plastics extruder. Each TCU controls
a heating element and a cooling water
solenoid to maintain each extruder
zone at a desired temperature. The
heater current monitor of the TCU is
used for early detection of heater
element failure. The linear DC output
is used to retransmit the process
temperature to a control computer for
data logging purposes.
OP1-A
OP1-B
OP1-C
USER INPUT
TC +
COMM
OUT +
OUT -
N/C
N/C
CT
CT
DATA
EXTRUDER
SUPPLY
CURRENT
TRANSFORMER
SSR
POWER
UNIT
AC POWER
120 VAC
COOLING OUTPUT
HEATER CURRENT FAIL OUTPUT
MAIN CONTROL OUTPUT
THERMOCOUPLE INPUT
4 -20 mA LINEAR DC OUTPUT
SECOND INPUT
(CURRENT TRANSFORMER)
240V HEATER
WATER
COOLING ALARM/COOLING
SUPPLY
HB
ALARM
TEMPERATURE RETRANSMISSION
LOGGER
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1 COOLING/ALARM COMMON
AL1-A
OP2-A
AL1/OP2 COMM
8