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RS-485 (2 wire) Electrical Signal Interface Connection & Pin Assignments
The RJ-11 connectors are located at the rear panel of the TC8116.
Two wire (Half Duplex) RS-485 Asynchronous
For two wire RS-485, use pins 3 and 4.
Either pin 6 or pin 1 can be Signal Ground.
TC8116 Rear Panel
with 2 wire RS-485 Async interface
RJ-11 JACK
(Pin assignment)
6
5
4
3
2
TxData+/RxData+
TxData-/RxData-
Figure 6. Two wire RS-485 Async Pin Assignments & Virtual Connection Diagrams
Intercom & Analog Interfaces
For Voice and audio channels, pin 5 is transmit TIP & pin 2 is transmit RING (the signal from the handset's
mouth piece). Pin 4 is receive TIP & pin 3 is receive RING (the signal that goes to the handset's ear piece).
Similarly, pin 5 on an intercom channel is MIC+ & pin 2 is MIC-, while pin 4 is SPKR- and pin 3 is SPKR+.
(Analog)
RJ-11 JACK
RJ-11 JACK
5
TTIP
2
TRING
RTIP
4
RRING
3
FIBER CABLE
Figure 7. RJ-11 Analog and Intercom Pin Assignments & Virtual Connection Diagrams
1
Not used
Not used
TxData+/RxData+
TxData-/RxData-
Signal &
Frame
Ground
RJ-11 JACK
(Pin assignment)
6
5
4
3
2
1
5
TTIP
2
TRING
4
RTIP
3
RRING
(Async 2 wire RS-485)
RJ-11 JACK
RJ-11 JACK
2
2
5
5
4
4
3
3
1
1
6
6
FIBER CABLE
(Intercom)
RJ-11 JACK
RJ-11 JACK
MIC+
5
MIC-
2
SPKR-
4
3
SPKR+
FIBER CABLE
- 8 -
TC8116
User's Manual
Rev. 5.6D
RJ-11 JACK
(Pin assignment)
6
5
4
3
2
1
Not used
Not used
TxData+/RxData+
TxData-/RxData-
Signal &
Frame
Ground
RJ-11 JACK
(Pin assignment)
6
5
4
3
5
MIC+
2
MIC-
4
SPKR-
SPKR+
3
2
1
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