Yokogawa 414 Batch Controller User Manual download pdf (Page 41)

Input Circuits 39

6. INPUT CIRCUITS

This section covers the connection of flowmeter signals for:

♦

Model 414D Batch Controller with input signal conditioning card.

♦

Model 414B Batch Controller with a basic signal input capability.

Both the Model 414D and 414B have a regulated output which can be used to

power sensors. A trimpot on the rear of the instrument allows the voltage to be

adjusted in the range of 8-24 Volts and the output can supply a maximum of

50mA.

6.1 INPUT CIRCUIT FOR THE MODEL 414D

The Model 414D has an input conditioning card which will accept signals from

most pulse or frequency producing flowmeters. An 8 position DIL switch on the

rear panel enables the input circuit to be configured for different signal types.

The input will interface directly to:

- Turbine Flowmeters

- Open Collector Outputs

- Reed Switches

- Logic Signals

- Two Wire Proximity Switches

The following pages give examples of interconnection to various signal outputs,

and a circuit diagram of the input is also provided.

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Yokogawa 414 Batch Controller User Manual Page 41