ABB AC 800F

4 Cabling the AC 800F
4-30
When cabling proceed as follows:
1. Lay the bus cable
• Do not lay the cable close to power cables
• Screw the terminating resistors to both cable ends
• Note that the min. bending radius of the 10Base5 cable is 15 cm.
2. Connect the bus cable to ground
• Provide for a low transition resistance and a reliable contact. Ground the bus
cable using a grounding clip. This is done by connecting the clip to the
10Base5 terminating resistor and grounding it. Provide for low contact
resistance and permanent contact.
• Insulate the terminating resistor without grounding clamp. Make sure that no
contact to ground (neither earth nor a conductive part of the building) exists.
• If several cable segments are connected by 10Base5 N/N connectors, these
must also be insulated from ground.
• If your installation has not been connected to ground as described
above, neither operational reliability nor RFI suppression or
EMI/RFI shielding can be guaranteed.
• The terminating resistors or connectors of a grounded cable have
the same potential as the grounding point. Do not touch. A
compensating current may flow through your body.
• When linking two cable segments, do not directly touch them before.
A compensating current may flow through your body, if the cable is
in contact with ground at two points.
• Observe the safety regulations and standards applicable in your
country.