Toshiba GR-200 Series Instruction Manual page 556

Binary inputs
5.6.3
Types of binary input circuits
(i)
There are two types of binary input circuits:
Independent-negative terminal type
Common-negative terminal type
Table 5.6-2 describes the circuit features and symbols.
No. Types
Independent-
1 negative terminal
type
Common-negative
2
terminal type
Table 5.6-2 Input features and symbols
Features
-Isolated using photo coupler
-Polarity dependent
-Independent circuit
-Selectable thresholds (4 stages)
-Isolated using photo coupler
-Polarity dependent
-Sharing negative terminal
-Selectable threshold (3 stages)
- 537 -
6F2T0200 (0.15)
Symbols
(+) 1
BI1
2
(-)
Terminal number
Polarity
(+) 5
BI3
(+) 6
BI4
(+) 7
BI5
(+) 17
BI15
(-) 18
Terminal number
Polarity
GRE200 (1,2)