Expansion Boards for Meters with Modbus Master Capability

ION 7500 / ION 7600 User’s Guide

 

 

Description

Maximum # of

Maximum # of

Maximum # of

Possible Maximum

Analog Inputs

Analog Outputs

Analog Devices

Configurations

 

 

 

 

 

 

Board A WITHOUT Optional

6

6

6

Any combination up to 6 total

 

 

 

Power Supply

 

 

 

 

 

 

 

 

 

Board A WITH Optional Power

7

15

15

Board full

Supply

 

 

 

 

 

 

 

 

 

Board A WITHOUT Optional

13

21

21

A: 6 AI; B: 7 AI, 8 AO

Power Supply + Board B

 

 

 

A: 6 AO; B: 7 AI, 8 AO

 

 

 

A: 6 AO; B: 15 AO

 

 

 

 

 

 

 

 

A: 6 AI; B: 15 AO

 

 

 

 

 

Board A WITH Optional Power

14

30

30

Both boards full

Supply + Board B

 

 

 

 

 

 

 

 

 

Expansion Boards for Meters with Modbus Master Capability

For ION meters that have Modbus master capability, the Grayhill OpenDAC I/O system provides extended functionality. The Grayhill OpenDAC system provides serial Modbus RTU connections to the ION meter. Extended analog and digital I/O capability are provided by the Grayhill OpenDAC rack.

OpenDAC controllers provide network connections but do not perform local control, and are used most often with ION meters that have Modbus master capability. OpenLine hardware modules fit into an OpenDAC rack to make up the system. OpenLine hardware modules are dual-point modules, for example, one digital input module has two input channels. The Series 73L modules are analog, and measure or control voltage, current, or temperature. The Series 70L modules are digital and are discrete — either on or off.

Grayhill OpenDAC controllers and hardware modules let you stack up two racks for a total of 32 I/O points. You can also mix analog and digital inputs and outputs on the same rack. You must have a power supply for each expansion board. These power supplies are purchased separately.

In general, you require the following to use the OpenDAC system with an ION meter that has Modbus master capability:

ION Meter with Modbus master capability

OpenDAC controller

One or two OpenDAC racks

Up to eight OpenLine hardware modules (per rack) up to 16 I/O points per rack

Five-volt, 5-Amp DC power supply (you may need more amperage if you using current output modules)

OpenDAC Modbus Configuration Installation and Troubleshooting Guide,

Bulletin #812

Page 214

Digital and Analog I/O Technical Note

Page 213 Page 215
Page 214
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Multi-Tech Systems 7600, 7500 manual Expansion Boards for Meters with Modbus Master Capability
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7500, 7600 specifications

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