AppendixC Wiring Information
Communications Interfaces
Table 32 lists the MPRX Host Communications Cable Pin Designations. For TransCore part numbers, refer
to “Pretest Accessory Options Available From TransCore” on page 2–26.
Table 33 lists the interfaces available with the MPRX.
Table 32 MPRX Host Communications Cable Pin Designations
HOST CABLE
PAIR COLOR PIN NUMBER NAME
1
black or gray 12 VIN RTN
red 11 VIN
2
black or gray 9 COM GND (RS232)
white 1 RS232 TX
3
black or gray 10 COM GND (RS422)
green 2 RS232 RX
4
black or gray 3 LOCK
blue 4 LOCK RTN
5
black or gray 6 RS422 TX -
brown 5 RS422 TX +
6
black or gray 8 RS422 RX -
yellow 7 RS422 RX +
Table 33 Communications Interfaces and Conductor Requirements
Interface Number of
Conductors
RS–232 3
RS–422 5
Ethernet 4
MPRX User Guide
TransCore Proprietary
C–114