Installing the control unit onto a DIN rail
NOTICE
Do not install the control unit adjacent to electromagnetic disturbance
sources (for example, relays, contactors, brake choppers, and power cabling). The
minimum recommended distance to such components is 200 mm (7.9 in). ABB
recommends that you install metallic screening between the control unit and the
source of disturbance. This can reduce the required distance.
NOTICE
Make sure that air can pass freely through the ventilation holes in the control
unit housing. Do not install the control unit directly above heat-generating equipment.
If you do not obey these instructions, the control unit can become too hot.
You can install the control unit horizontally or vertically onto a standard 35 × 7.5/15 mm
DIN rail. If the control unit is installed horizontally, make sure that the connectors
point down. If the control unit is installed vertically, the connectors can point to the
left or right.
Leave sufficient free space around the control unit for:
• cabling
• cooling
• replacing the memory unit and real-time clock battery.
The control unit is grounded through the DIN rail and the grounding screw.
1. Attach the two latches to the back of the control unit with four screws for each
latch.
2. Ground the control unit to the cabinet frame with a grounding conductor. Use a
M4×6 or M4×8 screw to attach the grounding conductor to the control unit. Refer
16 Mechanical installation
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