TMC-4 Control Card
for Electric Actuators
Installation & Maintenance Manual
5
04/06/22
www.atcontrols.com
IOM08139 REVISION 04
2. Wiring and Operation
The supply voltage and motor should be connected as
shown in the wiring section.
SUPPLY
Supply voltage is connected to terminals (P1-2) and (P1-
3). Line/+ should be connected to (P1-2) and Neutral/-
should be connected to (P1-3). The AC version can
accept a single phase supply voltage of 85-250VAC, 50-
60Hz, while the DC version can accept a supply voltage
of 24VDC. An Earth ground connection is provided on
terminal (P2-7).
MOTOR
For AC type motors, the winding that drives the actuator
clockwise should be connected to the Motor CW terminal
(P1-5), and the winding that drives the actuator
counterclockwise should be connected to the Motor
CCW terminal (P1-6). The motor neutral wire should be
connected to the Motor N terminal (P1-7).
For DC type motors, the wires should be connected to
the Motor CW (P1-5) and Motor CCW (P1-6) terminals
only. When operating DC motors, the Motor CW and
Motor CCW terminals switch polarity to the motor. A
clockwise operation will apply the positive supply voltage
to the Motor CW terminal (P1-5), and a counterclockwise
operation will apply the positive supply voltage to the
Motor CCW terminal (P1-6). The motor wires should be
connected accordingly.
BRAKE
An external brake connection is provided on terminal
(P1-4) to operate spring return type actuators that use a
motor brake to hold the actuator in position. The output
is the same voltage as the supply voltage. The maximum
brake output rating of 300mW, 350V, 120mA continuous
load must not be exceeded.
The AC version of the TMC4 keeps the external brake
output energized until either of the motor outputs is
activated, at which point, the external brake output
deenergizes. The DC version of the TMC4 keeps the
external brake output deenergized until the motor
outputs are activated, at which point the external brake
output energizes.
The brake setting is currently configured exclusively for
use on Triac SRX series actuators and is not
configurable. Care must be taken when using with other
type of actuator motor brakes.
Using brake output on incorrect brake type
may damage the TMC4 card, brake or
actuator.
HEATER
The TMC4 also provides a dedicated terminal (P1-1) for
a heater output that is internally connected directly to the
Line/+ supply terminal (P1-2). An enclosure heater is
strongly recommended to prevent moisture inside the
actuator enclosure. The other heater connection should
either be to motor neutral terminal (P1-7) or supply
Neutral/- terminal (P1-3).
I/O
Standard analog control inputs for 4-20mA, 0-5V, 1-5V,
0-10V, 2-10V should be connected to signal input A1
terminals (P2-2) and (P2-3). 0-20mA and 0-10V analog
feedback signals should be connected to A2 terminals
(P2-4) and (P2-5). This feedback signal is self-powered
by the TMC4 controller, so no loop power is required by
the user.
The TMC4 can also be configured to operate by a
variable resistor input, such as a slide wire or
potentiometer by connecting the ends across the
+24VDC (P2-1) and AGND (P2-3), and the wiper to the
input A1 terminal (P2-2).
The +24VDC output across (P2-1) and (P2-6) is
available to drive a single device up to 30mA or use with
handheld loop calibrator set as 2-wire transmitter to
locally control the actuator while conserving battery
power. Refer to wiring diagrams in following section.
The input A1 and output A2 terminals also serve to
operate as a two-position actuator when configured for
ON-OFF command type using an external 12-24VDC
signal, or using the internally su24VDC output.
In ON-OFF command type, A1 terminal (P2-2) functions
as the Open/CCW input, and A2 terminal (P2-4)
functions as the Close/CW input. This can be useful if
driving AC motor with isolated low power command
signal.
NOTE:
If driving the motor through limit switches, the
actuator can be operated like a standard on/off, but will
not display end of position unless limit switches are
wired to the on-board position limit switch connection
header (P5).
