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ControlWave Gas Flow Computer (GFC) Instruction Manual (CI-ControlWave GFC)

Revised Nov-2011 I/O Configuration and Wiring 3-7

3.3.2 Non-Isolated Discrete Outputs (DO) on TB3 of Process I/O

Board

Process I/O Board terminal block connector TB3 provides interface to

two dedicated non-isolated discrete outputs DOs – DO1 and DO2. In

addition, terminal block connector TB3 provides two additional points

that can serve as either discrete inputs or discrete outputs (DO3 and

DO4 when wired as outputs).

Table 3-4. Non-Isolated DO General Characteristics

Type Number

Supported

Characteristics

Discrete Outputs

(DO)

2 to 4 (on

TB3)

 Supports 30V operating range. Can

sink 400 mA max at 30Vdc (open

drain).

 Maximum output frequency of 20Hz.

 Surge protection between signal and

ground.

Wiring

See Figure 3-2 for wiring diagrams.

Software Configuration

To use data from these DOs you must include a CWM_EIO board in

your ControlWave project using ControlWave Designer’s I/O

Configurator, and then configure it. See the ControlWave Designer

Programmer's Handbook (D5125) for more information. That same

manual includes an I/O Mapping section that describes, for advanced

users, the I/O map for this board.

Note: You must specify whether a discrete input/output is a DO or a

DI in ControlWave Designer’s I/O Configurator by

configuring a DO pin or a DI pin.

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Emerson ControlWave GFC Manuel d'instructions Page 63