Detcon 412B User Manual

Page 6

1.5 S

TART

Upon completion of all field wiring: Depress the power switch located on the front panel. Note that each Model
12B controller digital display illuminates. Varying readings may occur during sensor warm-up. A 10 second alarm
delay will occur on power up. Refer to section 3.0 for additional sensor start-up detail.

1.6 M

AINTENANCE

& R

EPAIR

The Detcon Model 412B’s modular design allows for minimum down time during maintenance and/or repair. A
model 12B control module may be changed by simply loosening its mounting screw and sliding the module out of
its card cage. See section 3.0 for more information on the 12B control module.

The Model PS80-12B 80 watt power supply can be replaced by first loosening its two mounting screws and then
sliding it out of the panel. A new power supply can then be installed or the existing one repaired. It is recommend-
ed that VAC and VDC power be removed from the 412B motherboard before doing maintenance on, or replacing
the power supply.

Replacement of the power switch, or fuse holder is accomplished by: removing the power supply from the panel;
disconnecting the plug from its respective header; remove the wires from the plug of the component to be replaced;
snap the component out of the PS80-12B face plate and then reassembly with the new component. Reference the
PS80-12B schematic/wiring diagram in section 1.3 for wiring details.

Replacement of the power supply itself is accomplished by: removing the PS80-12B power supply module from the
panel; disconnecting the four plugs from their respective headers; removing the 3 screws that secure the PS80-12B
face plate to its bracket; removing the 4 screws that mount the power supply to the bracket; disconnect the wires
from the power supply and then reassembly with the new power supply. Reference the PS80-12B schematic/wiring
diagram in section 1.3 for wiring details.

1.7 S

PARE

ARTS

IST

Part #

Description

0224

Gold plated jumper tab

951-5880-121

PS80-12B 80 watt modular power supply (this is the complete plug-in power supply module)

360-801024

80 watt, 24 VDC switcher power supply (replacement power supply for PS80-12B)

2812

24 VDC lamp for power switch

0298

2 amp 3AG slow blow fuse

320-3217-1

Power switch assembly

2806

Green switch cap (for power switch)

3280

Fuse holder

1.8 W

ARRANTY

Detcon Inc., as manufacturer, warrants under intended normal use each new Model 412B rack mount control
enclosure to be free from defects in material and workmanship for a period of one year. The warranty period begins
from the date of shipment to the original purchaser and ends one year thereafter. All warranties and service policies
are FOB the Detcon Inc. facility located in The Woodlands, Texas.

Model 412B Rack Mount Control Enclosure PG.6

Shipping Address: 3200 A-1 Research Forest Dr., The Woodlands, Texas 7381

Mailing Address: P.O. Box 8067, The Woodlands, Texas 77387-8067

phone 888-367-4286, 281-367-4100 • fax 281-292-2860 • www.detcon.com • [email protected]