16
PW466i
Hardware Instruction Manual
7
．
Binary inputs and outputs
7.1 General description
PW466i
has 8 binary inputs in two groups.
The first group of 8 binary inputs (A, B, C, D)
are on the front panel.
The second group of 4 binary inputs (E, F, G,
H) are on the rear panel.
7.2 Binary Input
The device has 8 binary inputs. Electricity is
isolated in A-H. Space contact or active
contact (10V-250V) can be set by software.
The threshold impedance for space contact is
shown below. The threshold impedance for
active contact can be set by software in
10V-
250V.
When connecting active contact, the polarity
should be correct, red to positive, black to
negative, otherwise, false tripping will occur.
The polarity for A-H shows below figure.
