2 input circuit for the model 414b – Yokogawa 414 Batch Controller User Manual
Page 46
44 Input Circuits
6.2 INPUT CIRCUIT FOR THE MODEL 414B
The Model 414B will accept basic squarewave, pulse or open collector output
signals, but is not able to read mV signals from coils, nor two wire proximity
switch outputs. The Model 414B has limited input filtering and signal levels must
switch between the levels specified below.
For open collector outputs, an internal 10K resistor will act as a load. However,
the user must still ensure that the resulting signal will switch about the specified
levels.
General Specification
Signal Types:
Squarewave, Pulse or Open Collector.
Signal Level:
The "low" signal level must be < 1.5Volts.
The "high" signal level must be > 3.0Volts and must not
exceed 30 Volts.
The input circuit for the Model 414B and installation examples are shown on the
following pages.