Submittal Sheet
Honepell
SDCR Slave Damper
Control Relay
The Slave Damper Control Relay, Model SDCR,
is a relay control panel used when three or more
dampers need to be controlled by a single switch
or thermostat. The SDCR can control up to four
dampers. Each motor is controlled individually by
a separate set of contacts in the plug-in relay-
The SDCR can be wired to open and close all
damper motors simultaneously. By reversing the
M4 and M6 wires on any motor, these dampers
can be made to operate in reverse of the other
dampers, such as in a face and by-pass
operation.
Each SDCR can control up to four individual
damper motors. When more than four damper
motors need to be controlled, multiple SDCR
relay panels can be wired together to control as
many dampers as necessary. Each SDCR
requires an individual 24 Volt, A.C., 40 VA
Transformer to power each set of damper motors.
All of the SDCR relays can be wired together to
be controlled by one set of switch contacts. The
C and C terminals are the SDCR’s relay coil.
The SDCR can also be powered from any zone of
any Master&ok@ panel. The C and C terminals
wire to the Ml and M4 terminals on the
Mastertrol@.
On older MastertrolO panels that
have five motor terminals, Ml-M2-M4-M5-M6, a
jumper is required between terminals M2 and M5.
OPERATION
When the SDCR is de-energized, each motor
contact will have power between the Ml and M6
terminals.
This will typically drive the damper
closed. When the SDCR is energized with 24V.
at the C and C terminals, each motor contacts will
have power on the Ml and M4 terminals. These
typically power the damper open.
WIRING
The SDCR requires its own 24 Volts, A.C., 40 VA
Transformer. This is wired to the 1 and 2
terminals.
The Trol-A-Temp Opposed Blade Dampers are
power open and power closed motors. These
@ U.S. Registered Trademark
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require three wires to the SDCR from each motor.
Terminals Ml-M4-M6 wire to each motor’s 1-4-6
respectively. Each motor requires a field installed
jumper across terminals 2 and 5 on the motor.
The Trol-A-Temp Automatic Round Damper,
Model ARD, requires only two wires to the SDCR.
The ARD can be configured as a Power Open and
Spring Return Closed Damper or a Power Closed
Spring Return Open Damper. When wiring a
Power Open damper the damper motor wires to
terminals Ml and M4.
When wiring a Power
Closed damper, the motor wires go to terminals
Ml and M6.
Other style dampers can also be wired to the
SDCR provided their requirements are 24V. power
open and/power closed.
INSTALLATION
The SDCR is shipped in a sturdy metal enclosure
and the circuit board is snapped on to standoffs in
the case. The cover can easily be removed for
wiring by swinging up and pulling away one side of
the cover from the case.
To remove the circuit board, insert a small screw
driver in the hole on each corner of the case.
Gently lift up each corner of the circuit board
removing the circuit board from the standoffs.
Using two screws and the mounting holes in the
case, mount the case against any flat surface.
Once the case is mounted, place the circuit board
back on the standoffs and press each corner firmly
until the board snaps into place. Wire the SDCR
according to the wiring diagrams and place the
cover back on to the case by aligning the top
corner dimples into the indentations at the top of
the case.
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68-0224