YASKAWA MEMOCON GL120 User Manual page 165

4 Analog I/O Specifications
4.1.3 Analog Input Modules (4 to 20-mA, 4 channels)
(3) Connecting Current Signal Sources
(4) Connecting Voltage Signal Sources
(5) Unused Input Circuits
(6) Crimp Terminals
(7) Unconnected Terminals
5) I/O Allocation
a) Connect + side of a current signal to "+" terminal of the Module.
b) Connect - side of a current signal to "-" terminal of the Module.
c) Connect the shield of a shielded twisted-pair wire to "Shield" terminal of the Module and short
"Shield" terminal, "S" terminal, and "-" terminal. An incorrect connection will make the input sig-
nal unstable and cause malfunction.
a) Connect + side of a voltage signal to "+" terminal of the Module.
b) Connect - side of a voltage signal to "-" terminal of the Module.
c) Connect the shield of a shielded twisted-pair wire to "Shield" terminal of the Module, and short
the "Shield" terminal to "-" terminal.
d) Leave the "S" terminal open, or the input signal will become unstable and cause malfunction.
Unused inputs have the "S" terminal shorted to the "+" terminal and to the "-" terminal, as well,
one of these terminals must be shorted to the appropriate "Shield" terminal.
Use M3 terminals for crimping to the terminal block.
Terminals 17, 18, and 20 are not connected.
I/O allocation is necessary when using the Analog Input Module (4 to 20-mA, 4
channels). For further details on I/O allocation, refer to 4.3 I/O Allocation.
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