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

3-6 I/O Configuration and Wiring Revised Nov-2011

3.3.1 Non-Isolated Discrete Inputs (DI) on TB2 and TB3 of Process

I/O Board

Process I/O Board terminal block connector TB2 provides interface to

four dedicated non-isolated discrete inputs DIs – DI1 through DI4. In

addition, terminal block connector TB3 provides two additional points

that can serve as either discrete inputs or discrete outputs (DI5 and DI6

when wired as inputs).

Table 3-3. Non-Isolated DI General Characteristics

Type Number

Supported

Characteristics

Discrete Inputs

(DI)

4 on TB2

(optionally

2 on TB3)

 Supports dry contact inputs pulled

internally to 3.3 Vdc when field input is

open.

 Source current for DI1 to DI4 of either

60 μA or 2 mA based on switch SW1-

3 setting. See Table 3-2.

 Source current for DI5 to DI6 of either

200 μA or 2.2 mA based on switch

SW1-3 setting. See Table 3-2.

 15 ms input filtering

Wiring

See Figure 3-2 for wiring diagrams.

Software Configuration

To use data from these DIs 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 DI or a

DO in ControlWave Designer’s I/O Configurator by

configuring a DI pin or a DO pin.

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Emerson ControlWave GFC Manuel d'instructions Page 62