Current Transformer; Cms Flat Cable - ABB CMS-700 User Manual

CMS-700 SYSTEM CIRCUIT MONITORING SYSTEM (CMS)
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Components of CMS system
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Current Transformer

Example: CT PRO XT 250
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CMS Flat Cable

The CMS flat cable is a 4-pin cable for connecting multiple sensors to one control unit. The cable
is available in the following four lengths: 2m (CMS-800), 5m (CMS-802), 10m (CMS-803),
and 30m (CMS-805).
Please take into account the following information on the possible cable length of the CMS flat cable
depending on the number and shape of sensors:
Number of sensors
32
28
24
20
16
12
8
• Do not exceed a total flat cable length of 32m for all CMS-Bus lines for each control unit.
• Flat cables longer than approx. 15m could require a 120Ω terminating resistor between the two inner
wires at the far end.
• For the flat cable, please consider:
- Use within closed housings only
- Keep a distance of min. 5.5 mm to uninsulated live parts
- Where necessary, additional protection against mechanical stress or UV radiation must be ensured.
Maximum flat cable length in m
Solid-core sensors
4.5
5.0
6.0
7.0
8.5
11.0
16.0
Open-core sensors
7.5
8.5
10.0
12.0
15.0
20.0
30.0
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