Omron NSJ CONTROLLERS - 03-2008 Operation Manual page 134

Mounting and Wiring Expansion Units
Communications
Cables
Note
Wiring the Communications Cable
Note
1,2,3...
Use the following shielded twisted-pair cables for Controller Link connections.
Model
ESVC 05X2C-13262 BANDO ELECTRIC WIRE
ESNC 05X2C-99-087B Nihon Electric Wire & Cable
Always use one of the above communications cables. Normal communica-
tions may not be possible if any other cables are used.
(1) Use the cable specified for the communications cable.
(2) Keep communications cables separated from power lines or high-tension
lines to prevent influences from electronic noise.
(3) Ground the shield of the communications cable at one end of the network.
Do not ground the shield at both ends.
(4) Do not connect the shield cable of the communications cable to a ground
that is also being used for power-system devices, such as inverters.
(5) Turn ON the terminating resistance switch at the node at each end of the
network and turn OFF the terminating resistance switch at all other
nodes.
(6) Do not run wiring outdoors. If outdoor wiring is necessary, take protective
measures against lightening, such as underground wiring or wiring inside
pipes.
(7) The minimum length of the communications cable between nodes is 1 m.
Prepare the communications cables at a length of 1 m or longer.
(8) Use the multidrop method for connecting nodes. Normal communications
will not be possible with T branches.
Connect the communications cable to the connector using the following pro-
cedure.
1. Taking care not to damage the mesh of the shield, strip about 50 mm off
the end of the cable. Do not strip the cable too far because it may cause a
short-circuit.
Approx. 50 mm
Manufacturer
Section 5-3
103