Yaskawa 120 Series I/O Modules - Manual (Page 153)

4 Analog I/O Specifications
4.1.1 Analog Input Modules ( ±10 V, 4 channels)
4-6
(3) Connecting Differential Signal Sources
a) Connect + side of a differential signal to “V+” terminal of the Module.
b) Connect - side of a differential signal to “V-” terminal of the Module.
c) Connect the shield of a shielded twisted-pair wire to “Shield” terminal of the Module.
d) Connect the shield of a shielded twisted-pair wire on the signal source side to 0 V of the differ-
ential signal source. An incorrect connection will make the input signal unstable and cause mal-
function.
(4) Connecting Single-ended Signal Sources
a) Connect + side of a single-ended signal to “V+” terminal of the Module.
b) Connect - side of a single-ended signal to “V-” terminal of the Module.
c) Connect the shield of a shielded twisted-pair wire to “Shield” terminal of the Module and short
“Shield” terminal to “V-” terminal. An incorrect connection will make input signal unstable and
cause malfunction.
(5) Unused Input Circuits
For a unused input circuit, short its “V+” terminal to “V-” terminal and also short
one of these terminals to its “Shield” terminal.
(6) Crimp Terminals
Use M3 terminals for crimping to the terminal block.
(7) Unconnected Terminals
Terminals 1, 5, 9, 13, 17, 18, and 20 are not connected.
5) I/O Allocation
I/O allocation is necessary when using the Analog Input Module ( ± 10 V, 4 CH). For
further details on I/O allocation, refer to 4.3 I/O Allocation.