Detcon 412B User Manual

Page 2

Table of Contents

1.0Introduction

1.1 Description

1.2 Specifications
1.3 Schematics
1.4 Installation
1.5 Start-up
1.6 Maintenance & Repair
1.7 Spare Parts List
1.8 Warranty

1.0 I

NTRODUCTION

Detcon Model 412B consists of 3 major assemblies:

1. The NEMA 1 rack mount control enclosure.
2. The single channel digital control modules.
3. The remote mount gas sensor assemblies.

The NEMA 1 control enclosure is detailed in section 1.0 of the manual, the control modules in section, 2.0 and
applicable sensor assemblies in section 3.0.

1.1 D

ESCRIPTION

Detcon Model 412B rack mount control enclosure, along with Model 12B digital control modules, is designed to
serve as a host assembly for up to four remote mount gas detection sensor assemblies. The control enclosure is
rated NEMA 1 suitable for installation in non-hazardous locations.

The single channel modular design supports application flexibility wherein multiple function gas detection systems
can be configured in any combination up to four channels. All control modules are plug-in front panel accessible
for easy maintenance and repair. The system is powered by VAC line power and/or 24VDC unless otherwise speci-
fied at time of order.

The control enclosure houses a modular power supply (Model PS80-12B) which includes, as standard operating con-
trols, a power on/off switch and a line power fuse. Discreet output terminal strips located on the controller mother-
board are provided for sensor terminations, Form C dry contact alarm outputs for three alarms plus fault (common
and choice of normally open or normally closed), 4-20 mA outputs for remote recording devices, and RS-485 serial
Modbus™ output. Additional terminations are provided for VAC power in, VDC power in, and remote alarm reset.

The Form C relay outputs, may be discreet, zoned, or common by gold plated jumper tabs located on the con-
troller mother board.

1.2 S

PECIFICATIONS

Electrical Classification

NEMA 1

Dimensions

14''W x 7''H x 8.75''D

Capacity

4 single channels

Power Input

117VAC/24VDC

weerr C

nssu

pttiio

5 watts per channel (full alarm peak load)

Model 412B Rack Mount Control Enclosure PG.2