1/0 Link Unit Wiring - Omron SYSMAC C Series User Manual

1/0 link unit wiring
Link adapter
M4x8 self-up
M4x8 self-up
screw
ransformer
bd
AC power
4 Connector
Connects the CPU or expansion I/O unit of the C20 to the 1/0 fink unit.
5 T/RCONT OUT terminals
Outputs a repeater signal in a system incorporating SYSBUS. A link
adapter is also used. The repeater output turns on when power is applied
to the CPU of the C20 and 1/0 link unit.
6 SYSBUS connector
Connects an opticai-fiber cable to the I/O link unit.
7 Power terminals
For applying AC power. The FG and LG terminals must be grounded at a
ground resistance of less than 1000.
The following points should be kept in mind when wiring the I/O link unit.
Be sure to perform grounding at a ground resistance of less than 1000 to
safeguard against electric shock.
The LG terminal is a noise filter neutral terminal. Normally, grounding is
not required. However, if serious noise problems exist and may cause the
1/0 link unit to malfunction, ground this terminal at a resistance of less
than 100Q.
Use twisted pair wires having a cross-sectional conductor area of at least
2mm? (AWG14).
For normal power line noise, the C20's internal noise-suppressing circuit
is sufficient. However, supplying power through a transformer with a
voltage ratio of 1:1 helps to greatly reduce equipment-to-ground noise.
Installation of such a transformer is recommended.
Use an AC power supply with a supply voltage within the rated operating
voltage range (AC 85 to 264V).
Use solderless terminals.
8.6mm max (O--{_] semma D _ | (For M4 screws)
A-5