Theory of Operation

Model GFC7001E Carbon Dioxide Analyzer

11.5.9.COMMUNICATION INTERFACE

The analyzer has several ways to communicate to the outside world. Users can input data and receive information directly via the front panel keypad and display. Direct communication with the CPU is also available by way of the analyzer’s RS-232 & RS-485 I/O ports or an optional Ethernet port. The analyzer can also send and receive different kinds of information via its external digital I/O connectors and the three analog outputs located on the rear panel.

 

COMM A

 

Male

 

COMM B

 

Female

ETHERNET

Control Inputs:

1 – 6

OPTION

 

 

Status Outputs:

 

1 – 8

A1

Analog Outputs

 

A2

Optional

4-20 mA

A3

 

RS–232 ONLY

RS-232 or RS–485

Mother

Board

PC/104 BUS

CPU

KEYBOARD

I2C BUS

A4

I2C BUS

FRONT PANEL DISPLAY

RELAY BOARD

Figure 11-16: Interface Block Diagram

Teledyne Analytical Instruments

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Teledyne GFC 7001EM operation manual Communication Interface, Mother, Keyboard, Relay Board