Construction - Honeywell 5701 Operating Instructions Manual

MAN0443.P65 Issue 13 Aug 04
05701-M-5001 A02279
CHAPTER 1 - SYSTEM CONCEPT
2.

CONSTRUCTION

The system consists of individual 1'' (2.54cm) wide cards fitted to a
rigid custom rack designed to fit Euro rack cabinets. Two rack widths
are available:
a. 19 inch with 17 card slots to house up to 16 Channel Control Cards
and an Engineering Card.
b. Half 19 inch with nine card slots to house up to eight Channel
Control Cards and an Engineering Card.
Each sub-rack contains an Engineering Card and a DC Input Card to
make up the rack system
The system is designed to meet the differing customer wiring
configurations and to achieve this the control functions are split away
from the relays and field wiring connections. A single channel of gas
detection therefore consists of:
a. Sensor Drive Module
In order to achieve compatibility with a range of different inputs and
sensor types, the circuitry necessary to control the sensor is
housed on an independent plug-in Sensor Drive Module. These
modules plug directly into a Channel Control Card and are factory
fitted. There are two different modules, one for catalytic inputs and
one for 4 - 20mA inputs.
b. Single Channel Control Card
Each Single Channel Control Card functions independently and
contains all the necessary electronic circuitry to provide the sensor
drive, alarm detection and gas level display for that channel of gas
detection.
c. Field Interface or Relay Card
The Field Interface/Relay Cards provide the interface connections
between the Control Cards and their respective field connected
gas sensor. In addition, Relay Cards provide alarm outputs to the
field connections.
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5701 Control System