Echelon PCLTA-20 Guia do Utilizador descarregar pdf (Página 42)

5-4 Electrical and Mechanical Interfaces

accept 12 to 26AWG (1.2mm to 0.45mm) wire. The terminals are connected as follows

(with terminal 3 being closest to the service LED):

Terminal Connection

3 Shield

2 RS-485 -

1 RS-485 +

Use only shielded cabling suitable for an RS-485 channel. The use of

unshielded cabling could result in damage to the adapter due to common

mode voltage associated with differences in ground potential between

different nodes.

Mechanical Considerations

PLCTA-20 models 74401 – 74404 measure 3.87” (9.8cm) H x 5.20” (13.2cm) L. Model

74405 measures 3.69” (9.4cm) H x 7.36” (18.7cm) L. All models are equipped with a

full-height chassis bracket. If a PLM SMX transceiver is used with a Model 74405

adapter, two PCI slots must be dedicated to the adapter due to the wider-width of the

assembled PCLTA-20/PLM adapter.

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Echelon PCLTA-20 Guia do Utilizador Página 42