Yokogawa 414 Batch Controller - Manual (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.