Rockwell-automation 1756-CFM ControlLogix Configurable Flowmeter Modul Manual de usuario descargar pdf (Pagina 15)

15Rockwell Automation Publication 1756-UM010B-EN-P - December 2011

What is the Configurable Flowmeter Module? 15

Understanding Module

Input Capabilities

The CFM module accepts input for up to two channels (mode dependent).

Each of the input channels can connect to:

 Magnetic Pickup - 50mV trigger

 TTL output - 1.3V trigger

 Preamp outputs - 4V trigger

You configure the CFM module’s two input channels for your specific

application(s). Each input channel has two input selections:

 Flowmeter Input (F0 & F1) - Connect input device to this input.

 Gate Input (Z0 & Z1) - Accepts 4-40V DC input pulses from open

collectors or external contact closures. These inputs are used in

Totalizer mode to:

– interface to a prover when a prover is enabled.

Understanding Module

Output Capabilities

The CFM module has two assignable outputs. These outputs are designed for

applications that require fast response. The outputs:

 are electrically fused/current limited to 4A; the total output

combination is limited to 7A.

 can be assigned to any input channel with user-defined trigger parameter

(see Table 1

 are current sourcing at 10-31.2V DC (1A maximum per output).

 must be connected to an external power supply.

 may be forced ON or OFF by the program.

IMPORTANT

You can assign both outputs to a given channel; however,

you cannot use the same output with two different

channels.

Table 1 - Assign the CFM Module’s Outputs

In this operational mode You can assign outputs that are

configured to trigger

Totalizer Frequency (acceleration)

Prover status

Fill control

High-Resolution Frequency Frequency

Frequency rate of change (acceleration)

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 167 168

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Rockwell-automation 1756-CFM ControlLogix Configurable Flowmeter Modul Manual de usuario Pagina 15