Port

Pins
(Protected)

Connector

Ground

Rating

Stages
Per Line

Remarks

Model

Data Transmission and Lightning Protection for Exposed Cable

RS-422

T+, T-
R+,R-

Screw

Screw Terminal

1500W

2(GT+AD)

4 Wire; Up to 5 MBPS;
Output limited to ±7.5 Volts

22NX

Data Transmission Lightning Protection for Buried Cable

PC COM PORTS 386/486

All 9

DB9 M/F

Stud

600W

1(AD)

RS-232 levels

29