3
Component
Picture
Function
Optional/Required
If Not Used...
PS914
24 VDC power supply
Power transfer
(EPT-10 shown)
External horn
Building fire alarm
(normally closed contacts)
External inhibit device
(card reader, key switch, etc.)
Rim and vertical -
(normally closed contacts)
Door position switch
(normally closed contacts)
Supplies power to Chexit
Provides louder alarm than
Chexit internal horn
Unlocks Chexit in case
of fire alarm
Arms Chexit 2.5 seconds
after door closes; sounds
alarm if door forced open
Allows authorized egress
or ingress without alarm
Transfers electrical power
through frame to door
(wires concealed)
Required
Insulate blue and
brown wires
separately
Required
Connect orange
wire to white
wire
Connect green
wire to
white wire
Use door loop or
electric hinge
Required
(Von Duprin PS914)
Highly
recommended
Optional
Required
Optional (wire multiple
external inhibit devices
in series)
Optional
Used?
Yes
Yes
Table 1. Installation Components
Table 2. Wiring Requirements
Wiring
Type of Power
Transfer
(door to frame)
Maximum Wire
Length from Power
Supply to Power
Transfer
Minimum
Wire Gauge
Power Supply Input
Power Supply Output
(+24 and GND)
External Alarm, Fire Alarm,
Door Position Switch,
External Inhibit Device
EPT-10
EPT-10
Electric Hinge
Electric Hinge
EPT-10,
Electric Hinge
N/A
Per code
100 feet
200 feet
75 feet
150 feet
Per code
14 GA
12 GA
14 GA
12 GA
18-22 GA
Not critical
The wiring requirements in Table 2
above
must
be followed.
IMPORTANT
!
E7500 Electric Mortise Lock
Serves as locking device on
CXE9975 mortise applications
Optional
(for CXE9975)
Yes
Table 3. Wire Functions
Power 24 VDC
Common for NO output;
24 VDC, 1 A maximum
Normally open output;
closes during alarm
Communication line;
used to connect Chexits
Communication line;
used to connect Chexits
Fire alarm input;
0 VDC = fire,
24 VDC = no fire
Door position switch input;
0 VDC = door open,
24 VDC = door closed
External inhibit input;
0 VDC = Chexit inhibited,
24 VDC = Chexit active
Signal 24 VDC;
can be used to power
FA, DPS, and EI inputs
Power supply ground
Red
Blue
Brown
Violet
Gray
Yellow
Orange
Green
White
Black
+24
C
NO
CM-
CM+
FA
DPS
E I
SC
GND
Optional
(for CXE9975)
Electric Mortise Fail safe -
(normally closed contacts)
Electric Mortise Fail secure -
(normally open contacts)
Allows authorized egress
or ingress without alarm
Allows authorized egress
or ingress without alarm
Optional (wire multiple
external inhibit devices
in series)
Optional (wire multiple
external inhibit devices
in parallel)
FIRE
