Allen-Bradley 1394 - Data Highway Connection

Publication 1394-5.0 — May 2000
Wiring 1394 GMC and GMC Turbo Systems 4-13
Figure 4.11
RS-232/422 Cable Signals
Data Highway Connection
The 1394 provides two optically-isolated ports (J1 and J2) for Data
Highway 485 (DH-485) communication. Both connectors are wired
identically (you can use either one). A telephone-type connector
provides the interface with the following signal designations.
Serial Device
5
2
3
Com
RxD
TxD
Shield
J3/CHAN A
J4/CHAN B
1394 connector is 9 pin, AMP #205204-1 or equivalent.
Recommended Cable -
Belden #9533 or Equivalent
Serial Device
4
2
7
RxD+
RxD-
TxD+
TxD-
Recommended Cable -
Belden #9503 or Equivalent
Com
3
5
RS-232C RS-422
J3/CHAN A
J4/CHAN B
1
1
1
Pin: Signal: Description:
1 Data A Data A Transmit
2 Data B Data B Transmit
3 NC No Connection
4 NC No Connection
5 Tx Enab Transmitted Data Enable
6 Shield Signal Shield
7 Com Signal Common
8 NC No Connection