Echelon PCLTA-21 Guide de l'utilisateur télécharger pdf (Page 36)

4-4 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 devices.

Mechanical Considerations

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

74405 and the PCLTA-20 Protocol Analyzer Card measure 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 an SMX or protocol analyzer card, two PCI slots must be

dedicated to the card due to the wider-width of the assembled PCLTA-20/PLM card.

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Echelon PCLTA-21 Guide de l'utilisateur Page 36