Alarm Contact Connections - Ametek Dycor CG1000-RTP User Manual

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Table Of Contents

Table of Contents

Watchdog Timer

Default: Deactivated (Closed)

A watchdog event triggers these alarm contacts to an open condition. If you have a watchdog

event, and the system returns to normal operations, the watchdog alarm will reset. The system

will retain in memory the last time the watchdog condition occurred.

Service Alarm

Default: Deactivated (Closed)

A service alarm event triggers these alarm contacts to an open condition.

Oxygen/Flow Alarm

Connections are configurable in

software to activate under a vari-

ety of user defined conditions,

3-8 | Dycor CG1000-RTP Oxygen Analyzer

Powering standard current outputs from an external voltage

The J8 connector on the back of the CG1000-RTP (Figure 3-5) contains a

set of pins to power the standard current outputs using an external volt-

age source:

VEXT

VEXTCOM

Jumper

Define which power source to use.

JP2

JP2 is in

Analyzer uses the internal supply to power the current output

(factory

circuits. if you try to use an external voltage at this time, the

default)

system will use whichever voltage is higher

CG1000-RTP voltage is normally about 28 Volts.

JP2 is

External voltage source must be used to power the cur-

removed

rent output circuits. The external voltage source must be no

greater than 30 volts dc.

To determine the minimum external voltage supply required to power the

current outputs, use the following formula:

VEXTmin = .02 amps (RLoad + Rwires) + 4 volts

VEXTmin = minimum external voltage required to power current output

circuit

RLoad =

load resistance of the current output device

Rwires =

resistance of the wires