SDC 474U TOUCHLESS SENSE SWITCH - Manual (Page 2)

Typical Wiring Examples
P:\INSTALLATION INST\Push and Key Switch\INST-474U.vsd Rev-B 10-13 Page 2
Connecting the 474U to
an Access Control Panel
or Door Operator:
Using the 474U as an
Request to Exit device
in an access control
system.
To Access
Control Panel
To 12/24VDC
Power Supply
To Auto
Operator
+
NO NC C NO NC C
12/24VDC Relay#1 Relay#2
* NOTE : Refer to manufacturer’s
installation instructions for Power
Supply, Keypad, & Lock wiring.
Locks must be the same voltage as
the power supply output.
FAIL
SECURE
LOCK
+
-
FAIL
SAFE
LOCK
+
-
SDC Model 918
Digital Keypad
12 or
24VDC
Main
Output
(+) (-)
SDC
600 SERIES
POWER SUPPLY
Touchless Sensor Power
+
NO NC C NO NC C
12/24VDC Relay#1 Relay#2
Terminal
Block
120V
A/C Mains
* *
*
E1
E2
E3
E4
E5
E6
E7
E8
AUXILIARY RELAY
2 AMPS @ 28VDC MAX
+
- KEY PAD POWER
12-24 VOLTS
AC OR DC
SENSE
GROUND
REX
GROUND
GROUND
OUTPUT 3
OUTPUT 4
GROUND
BLACK
GREEN
BLUE
BLACK
BLACK
VIOLET
BLACK
GRAY
MAIN RELAY
5 AMPS @ 28VDC MAX
NO
COM
NC
NO
NC
COM
}
}
}
474U
Terminal
Block
474U
Figure 1.
Figure 2.