COE Communications Engineering Document
Author:
Keith Gilbertson
Rev:
A
Date:
3/08/02
Pag
e:
19
of
33
GE
TRANSPORTATION
SYSTEMS
GLOBAL SIGNALING DIVISION
Title:
12RII FCC TECHNICAL MANUAL
J8 19-PIN CONTROL HEAD SIGNAL INTERFACE
J8-Pin Signal Description Mating Connector
J B+ 13V output to control head, fused. RCB J8-1
M Common 13V Return RCB J8-2
U RS485-A Serial Interface, differential current loop output RCB J8-3
S RS485-B Serial Interface, differential current loop output RCB J8-4
A Mic.-Audio Control Head 1 Mic audio input to radio RCB J8-5
V Rec-Audio Low level receive audio to control head 2 RCB J8-6
F I/O I/O-1 ID signal to Control Head 2 RCB J8-7
T I/O I/O-2 Master/Slave or Enable to Control Head 2 RCB J8-8
K Speaker + Speaker output signal to Control Head 2 RCB J8-9
L Speaker - Speaker output signal t Control Head 2 RCB J8-10
N N.C. Not connected RCB J7-11
E Shield Serial Cable Shield (radio chassis) RCB J8-12
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