Installation and Circuitry
196 Unrestricted SICAM A8000 / CP-8000 • CP-8021 • CP-8022 Manual
DC8-037-2.02, Edition 10.2017
6.7 Wiring
Due to the power dissipation in the device there is a higher temperature on the terminals than
the device ambient temperature. This increase is maximum 15°K with full load. For this reason
the isolation of the wires must withstand a higher temperature than the device environment
temperature (see example for process peripherals).
6.7.1 Power Supply
CP-8000 has an integrated power supply module (see 5.3.1, CP-8000 (integrated)).
• The supply can be performed via a station battery or series power units.
• For the fuse protection a circuit breaker 2-pole 2 A, characteristic C is prescribed (stand-
ard type: Siemens 5SY5 202-7).
CP-802x needs an external power supply module PS-862x or PS-864x (see 5.3.2.1, Technical
Data and 5.3.3.1, Technical Data).
• The supply can be performed via a station battery or series power units.
• PS-8642 can be supplied optionally via the public low-voltage network.
• Furthermore, 2 redundant power supply modules can be used (PS-862x as of production
level CC).
• For the fuse protection of PS-862x a circuit breaker 2-pole with 2 A, characteristic C is
prescribed (standard type: Siemens 5SY5 202-7).
• For the fuse protection of PS-864x a circuit breaker 2-pole with 10 A, characteristic C is
prescribed (standard type: Siemens 5SY5 210-7).
You can establish the supply with single leads of the type H07V-K (1.5…2.5 mm²) or a cable
of the type LA-YY-0 (2 x 1.5…2.5 mm²) or H05VV-F 3G (1.5…2.5 mm²).
Recommended and tested series power units (standard types) can be found in the Appendix
A.7, Recommended Upstream Power Supply Devices.
6.7.2 Communication RS-485
The wiring at the RS-485 interface is specified as follows:
Max. ambient temperature min. max.
Conductor cross section solid 0.2 mm² 1.5 mm²
Conductor cross section flexible 0.2 mm² 1.5 mm²
Conductor cross section flexible, with ferrule w/o plastic sleeve 0.25 mm² 1.5 mm²
Conductor cross section flexible, with ferrule with plastic sleeve 0.25 mm² 0.75 mm²
Conductor cross section AWG 24 16
AWG according to UL/CUL 16 24
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