Detcon 412B-FB User Manual

Page 7

1.6 I

NSTALLATION

1. Securely mount the 412B-FB enclosure in accordance with the drawing in figure 5.

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Reference figure 6 for wiring terminations.

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Observe correct polarity when terminating all input/output field wiring. Failure to do so may result in

circuit damage on power up.

2. Connect 117VAC input to the terminal strip labeled “VAC IN” (L1, N, GND).

3. If applicable, connect a 24VDC source or standby battery to the terminal strip labeled “VDC IN” (+ and –).

4. Refer to installation and wiring detail of remote mount sensor assemblies as detailed in section 3.0. Terminate

field wiring from sensors to the 412B-FB motherboard. Terminals are labeled “Sensor” (mA, + and –).

5. If applicable, terminate the discrete 4-20 mA outputs to external device(s). Terminals are labeled “4-20mA Out”

(+ and –).

6. If applicable, terminate the RS-485 serial output to external device(s). Terminals are labeled “RS-485” (A+, B–,

and Shield).

7. 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. Terminals are labeled “ALARM 1”
(Com & NO/NC), “ALARM 2” (Com & NO/NC), “ALARM 3” (Com & NO/NC), and “Fault” (Com &
NO/NC). Relay contact outputs may be discrete or zoned via the gold-plated jumper tabs. Relay contact outputs
may be used in conjunction with the multiple alarm relay circuit as described in section 1.3.

Model 412B-FB NEMA 4 Control Enclosure PG.7

20.75

19.25

12.5

15.75

9.75

Mounting Holes - 7/16" Dia.

Figure 5