Page 10 of 12 FR1AV user manual issue 1.2.2
10
Controlling Two Frames From One Panel
It is possible to configure and connect two frames so that the cards they contain are all controlled from
a front panel on one of the frames. The other frame must have no front panel control module. The two
frames can be up to 100m apart depending on the type of cable used and the ambient electrical noise.
The cards in one frame will have node numbers in the range 0 to 5. The cards in the other will be in the
range 16 to 21. A special cable must run between the "REMOTE 2" D-type connectors of the two
frames.
Selection of the higher node address range should be done before the frame is installed. The process
involves:-
1.
Remove the frame from its packaging and put it on a suitable working surface.
2.
Remove the lid from the frame by unscrewing all the fixings with a cross-head screwdriver.
3.
The links that select the node address are on the board that runs past the two fans at the rear of the
frame. They are labelled J1 and J2.
4.
The links are normally set in position 1, closer to the fan. This selects the lower address range. To
select the higher address range move both links J1and J2 to position 3, further away from the fan,
this will produce the node address range 16 to 21.
5.
Replace the frame lid, making sure all the fixings are fully tightened to ensure continued EMC
compliance. Cards inserted into the frame will now have node addresses in the higher range.
6.
Replace the frame in its packing material to protect it until it is installed.
The cable required uses two 26 way high density D-type sockets. These should be connected with
screened twisted pair cable containing two pairs. All the wiring is pin to pin links. Pins 16 and 7
should use one twisted pair, pins 17 and 25 the other. The screen should be connected to pin 6 on both
connectors. To ensure continued EMC compliance only good quality screened cable should be used.
