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Instruction Manual IM02602008E - Rev. D
Transformer Temperature Controllers
IM02602008E - Rev. D May 2019 www.eaton.com
2.4 Wiring the TC Temperature
Controller
WARNING
TURN OFF AND LOCK OUT THE POWER SUPPLY BEFORE
WORKING IN ANY TRANSFORMER CABINET. FAILURE
TO DO SO COULD RESULT IN INJURY OR DEATH FROM
ELECTRICAL SHOCK.
WARNING
WIRING MUST BE PERFORMED ONLY BY LICENSED/
QUALIFIED ELECTRICIANS WHO ARE TRAINED IN
THE INSTALLATION AND SERVICING OF ELECTRICAL
EQUIPMENT.
NOTICE
WIRING IS THE SAME FOR ALL MODELS, UNLESS
OTHERWISE STATED IN A SUBJECT HEADING OR TEXT.
2.4.1 General
Both the barrier cabinet version and the bezel-mounted
version are wired the same. However, the barrier cabinet
version is wired from outside the transformer cabinet. The
bezel-mounted version is wired from within the transformer
cabinet.
Wire size and type will vary depending on the specific appli-
cation. For direct connection to the terminal blocks, the wire
size must fall within the limits shown in Table 2:
Table 2 - Recommended Wire Sizes
Application
Wire Size
J1
Main power, Alarm, and Trip connections
12-22 AWG*
J2, J7,
J8
Thermocouple inputs, 4-20mA Output, and
Modbus network interface
14-28 AWG
J9, J10
Fan power
12-22 AWG*
* For J1, J9 and J10, if wiring outside this range is required it may be
accommodated with a properly sized ring terminal.
Figure 9, TC -Typical External Wiring Diagram, shows a typi-
cal wiring arrangement for all models.
Figure 10, TC - Detailed Drawing, shows a detailed descrip-
tion of mechanical connections for all models..
Figure 11, TC - Power and Discrete Input Wiring, shows alter-
native approaches for discrete input wiring (TC-100 only).
2.4.2 Wiring Procedures
Follow these procedures to wire all TC models.
2.4.2.1 Thermocouples
1. Connect the thermocouple wires to terminal block J2,
shown in Figure 10, TC - Detailed Drawing, as follows:
a. Connect Left Phase (A) (+) to terminal 1 and (-) to
terminal 2.
b. Connect Center Phase (B) (+) to terminal 3 and (-) to
terminal 4.
c. Connect Right Phase (C) (+) to terminal 5 and (-) to
terminal 6
d. Connect Ambient (+) to terminal 7 and (-) to terminal
8
otee:
N
The standard color code for K type thermocouple
wire is yellow insulation for the positive (+) lead and
red insulation for the negative (-) lead. For E type
thermocouple wire the standard is purple insulation
for the positive (+) lead and red insulation for the
negative (-) lead.
2.4.2.2 Trip Relay
1. Connect the trip contactor or coil to be controlled by
trip relays to terminal block J1, shown in Figure 10, as
follows:
a. Connect the trip relay Normally Closed (NC) contact
to terminal #1.
b. Connect trip relay Common (COM) contact to termi-
nal #2.
c. Connect the trip relay Normally Open (NO) contact to
terminal #3.
otee:
N
The fail-safe setting for the trip relay will determine
the state of the NO and NC contacts. When fail-safe
mode is Off, the NO contact is open when no trip
condition is present or latched, and closes to NC
when a trip condition occurs. This is reversed when
fail-safe mode is On.
2.4.2.3 Alarm Relay
1. Connect remote alarm equipment to be controlled by
the alarm relay to terminal block J1, shown in Figure
10, TC - Detailed Drawing, as follows:
a. Connect equipment to the alarm relay Normally
Closed contact (NC) to terminal #4.
b. Connect the alarm relay Common contact (COM) to
terminal #5.
c. Connect the alarm relay Normally Open contact (NO)
to terminal #6.
