Hitachi 670 Series Application Manual page 80

Hide thumbs Also See for 670 Series:

Table of Contents

Section 5

Communication set-up

IEC07000247 V1 EN-US

Figure 71:

IEC07000248 V1 EN-US

Figure 72:

RJ–45 pin

Metal house

Use a cable with twisted pairs and a high quality shield. Foil shielding alone is not enough. Rx+ and

Rx- should form one twisted pair, and Tx+ and Tx- should form another. A Cat5 S/FTP cable

(shielded/foil-twisted pair) used, for example, in ethernet communication is a good cable. The outer

shield around the cable consists of a braided mesh. In addition, every twisted pair has a foil

shielding.

Fibre-optic ports with ST type connectors

G.703 codirectional port (RJ–45)

Name

Tx+ (TIP-out)

Tx- (RING-out)

Rx+ (TIP-in)

Rx- (RING-in)

Shield

Direction

From 21-216 transceiver to multiplexer

From multiplexer to 21-216 transceiver

Cable shield must be connected

Communication set-up, 670/650 series

1MRK505382-UEN Rev. K

Application Guide