Detcon 110A-FB - Manual (Page 7)

03. If applicable, connect the 24 VDC standby battery to the lugless terminal strip (labeled VDC IN) on the
controller motherboard (see figure #4). The DC current load is a maximum 1 amp.
Caution: Observe correct polarity when terminating all input/output field wiring. Failure to do so may
result in circuit damage on power up.
04. If applicable, connect a normally open momentary remote mounted switch to the lugless terminal strip
(labeled RESET) located on the controller motherboard (see figure #4).
05. Refer to installation and wiring detail of remote mount sensor assemblies as detailed in section 3.0.
Terminate field wiring from sensors to Model 110A-FB lugless terminal strips located on the controller
motherboard (see figure #4).
Note: Based on the application and use of relay contact outputs, complete all wiring terminations prior to
application of power. Shut-in controls may be omitted until system test is complete.
1.13 S TART-UP
Upon completion of all field wiring, turn the unit on via the power switch located on the motherboard (see
figure #1). Note that the 110A-FB digital display illuminates. Varying readings may occur during sensor
warm-up. A 10 second alarm delay will occur on power up.
Detcon Model 110A-FB Gas Detection System PG.7
L1 L2
117
VAC IN
AUX 24
VDC IN
SENSOR
C NC NO C NC NO C NC NO MA
FAULT LOW HIGH
4-20
madc
OUT
RESET
MA
24VDC
–
+
4-20MA
Typical Sensor
ALARM CONTACTS
Common, Normally Open
and Normally Closed
External Alarm Reset Switch
Normally Open Momentary
Fig. #4
Wiring Detail