User Manual

12 Command Summary
4.3 RS422 Model
RS422 Header
Figure 12: RS422 Header
Table 8: RS422 Pinout
Pin
Function
1
Gnd
2
Rx (Y)
3
Inv Rx (Z)
4
Inv Tx (B)
5
Tx (A)
6
Vcc
The six pin RS422 interface header of the GLK240128-25-422/GLT240128-422 offers power and ground
connections as well as two differential pair communication lines. Regular and inverted lines are
provided for both receive and transmit signals. Power is supplied locally to the regular or –V variants
while the –VPT can receive power over a distance. The Tyco 282834-6 style header is most suited to a
simple wire connection.
Alternate Power Connector
Figure 13: Alternate Power Connector
Table 9: Alternate Power Pinout
Pin
Function
1
Vcc
2
Gnd
3
Gnd
4
NC
The Alternate Power Connector provides the ability to power the GLK240128-25-USB/GLT240128-USB
using a second cable. The Tyco 171825-4 style header is particularly useful for connecting to an
unmodified floppy power cable, a 171822-4 for example, from a PC power supply for a simple bench
power solution.