Panasonic GT21

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3.4 Precautions when Wiring COM Port
Precautions are different depending on communication conditions. Arrange wirings according to the
following instructions.
3.4.1 GT01 (5 V DC)
RS232C type
- Perform wiring and placement of the cable so that there is no impression of external noise on the cable
and no induction.
- Use shielded wires for distribution cables.
(Recommended cable: AIGT8142 with one ferrite core)
- It conforms to CE marking. As conditions, the following wiring is required.
1. Make the cable do three turns around a ferrite core.
(Recommended ferrite core: Seiwa Electric’s E04RA190120080 or equivalent)
2. Perform grounding of the cable shield.
* Packaged with AIGT8142.
RS422 (RS485) type
- There is no RS and CS (control lines).
- Perform wiring and placement of the cable so that there is no impression of external noise on the cable
and no induction.
- Use shielded wires for distribution cables.
(Recommended cable: AIGT8152 with one ferrite core(Seiwa Electric’s E04RA190120080))
- When using shielded cable with crossover wiring for the RS485 transmission line, grounded one end.
- “E” is used to set the terminating station.
- It does not conform to European EMC directive.
Key Point:
The CE marking standards that the GT01 conforms to (excluding the RS422 (RS485) type)
European EMC directive 2004/108/EC
European EMC standards (EN61000-6-4 and EN61000-6-2)