HONEYWELL 5704 Series CONTROL SYSTEM

HONEYWELL 5704 Series CONTROL SYSTEM

DESCRIPTION

The 5704 Series Control System is part of the System 57 family and is  designed to monitor field mounted industrial gas detectors. The principal features of the system are:

* Provides up to 64 channels of gas detection in a standard 19'' subrack using a 3U card format. 

* Provides up to 32 channels of gas detection in a half 19'' sub-rack  using a 3U card format. 

*  Racking available for both front and rear access field wiring. 

*  Simple field connections for wire up to 2.5mm2 (14 AWG). 

* Four channels per one inch wide card. 

* Control cards removable without disturbing other wiring. 

* Catalytic bridge or 4 - 20mA input control card versions. 

* Alarm change-over relay output options. 

* Optional time delayed operation of alarm relays. 

*  Multi-alarm mode for master, zoned and voted alarms. 

* Rising, falling, STEL, LTEL and update alarm outputs. 

* Remote inhibit and reset inputs per card. 

* Optional 0 - 20mA or 4 - 20mA isolated monitor outputs per  channel. 

* Easy to calibrate and operate using a dedicated Engineering  Card. 

* EMC compliant.

The system consists of individual 1'' (63.5px) 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 Four Channel Control  Cards and an Engineering Card. 

b. Half 19 inch with nine card slots to house up to eight Four Channel  Control Cards and an Engineering Card.

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. Four channels of gas detection therefore consists of: 

a. Four Channel Control Card

Each Four Channel Control Card functions independently and  contains all the necessary electronic circuitry to provide the sensor  drive, alarm detection and gas level display for four channels of gas  detection. There are two types of Four Channel Control Cards, one for catalytic  inputs and the other for 4 - 20mA inputs.

b. Quad Relay Interface Card 

The Quad Relay Interface Card provides the interface connections  between the Control Card and the respective field connected gas sensors. In addition, it provides four alarm outputs via the field connections. 

c. Relay Interface Assembly 

Where additional relay contacts are required, an Expansion Relay  Card is attached to the Quad Relay Interface Card. The new  assembly becomes the Relay Interface Assembly and expands the  alarm relays to 16. This combination occupies two interface card  slots and as a consequence limits the number of control cards that  can be fitted to the rack.