Crystal Vision
Installation
RJ45 422 Bus IO connector
Pin number Function
1, 2 and 3
Not used – 75 ohm resistor to GND in frame
4
TX+ bus RS422
5
TX- bus RS422
6
Not used – 75 ohm resistor to GND in frame
7
RX+ bus RS422
8
RX- bus RS422
The signals on pins 4, 5, 7 and 8 are also available on the Remote 6 connector.
Note:
TX and RX are defined on the boards. This connector can be used to connect a REMIND remote
control panel. If an external RS422 control device is to be used ensure that the controller will drive
the RX+ with TX+ etc.
Note:
Since there is no ground connection via the 422 Bus, two frames or other pieces of
equipment that share this connection must have a common ground connection. This will
normally occur through the earth pins on the mains connectors.
RJ45 422 Control Input connector (Indigo 4SE only)
Pin number Function
1
RX+ RS422 i/p Statesman
2
RX- RS422 i/p Statesman
3
TX+ RS422 o/p Statesman
4 and 5
Not used – 75 ohm resistor to GND in frame
6
TX- RS422 o/p Statesman
7 and 8
Not used – 75 ohm resistor to GND in frame
The signals on pins 1, 2, 3 and 6 are also available on the Remote 6 connector.
Note:
Since there is no ground connection via the 422 Bus, two frames or other pieces of
equipment that share this connection must have a common ground connection. This will
normally occur through the earth pins on the mains connectors.
Terminating the RS422 Statesman chain
The RS422 communication chain used for Statesman should be terminated when a frame is
the last device in a chain or when a frame is the only device. It is unterminated for all other
applications including when frames are used with a Statesman Hub.
To change the RS422 communications termination, access the RS422 term/unterm switch at
the top of the lower front panel PCB.
Indigo 4 CoolFlow User Manual R1.7
13
03/12/2012
