MODEX-OPTS, MODEX-OPTM
User’s Manual
Section 2. Controls and connections
Page 21 / 113
2.7.8. S/PDIF digital audio input and output
Some interface modules have standard RCA receptacles for digital coaxial audio inputs
and outputs.
Nr.
Name
1
S/PDIF input or output
2
Plastic insulator
3
GND
Figure 2-4. S/PDIF connector and pin assignments
Info: Plugs and sockets on consumer equipment are conventionally color-coded by CEA/CEDIA-
863-B (ANSI) to aid correct connections. According to the standard Lightware devices are
supplied with orange colored RCA connectors for S/PDIF signals.
2.7.9. IR connectors
IR Receiver and Transmitter are connected with TRS (Tip, Ring, and Sleeve) connectors.
They are also known as (3,5 mm or approx. 1
/8”) audio jack, phone jack, phone plug or
mini-jack plug.
Receiver
– 3-pole-TRS
Transmitter
– 2-pole-TRS
1
Tip
IR Input -
1
Tip
IR
2
Ring
GND
2
Ring
IR Output -
3
Sleeve
IR Input +
3
Sleeve
IR Output -
Table 2-5. TRS connector pin assignment for supplied IR accessories
Info:
Transmitter’s Ring pole is optional. If your IR Transmitter has three pole TRS plug, then the
Ring and the Sleeve are the same signal (Output - ).
2.7.10. RS-232 / RS-422 port
MODEX can be ordered with interface containing industry standard RS-232 and RS-422
9-pole D-SUB male connector.
Pin nr.
RS-232
RS-422
1
NC - not connected
RX- data receive complement
2
RX data receive (input)
RX+ data receive true
3
TX data transmit (output)
TX+ data transmit true
4
DTR (Internally connected to Pin 6)
TX- data transmit complement
5
GND signal ground (shield)
GND signal ground (shield)
6
DSR (Internally connected to Pin 4)
DSR (Internally connected to Pin 4)
7
RTS
RTS
8
CTS
CTS
9
NC - not connected
NC - not connected
Table 2-6. D-SUB 9-pole-connector and pin assignments
0
0
3
2
1
RCA receptacle
RCA plug
5
1
9
6
1 2 3
1 3
