Remote Line Controller (RLC) - Grostech.com

Remote Line Controller (RLC)
Product Manual
CONNECTION DETAILS
RS-232
A 9 to 25-way cable is used to connect the modem to the RS-232 port on the RLC.
RS-422A
Connect the screen to the SCRN terminal at both ends and use the Upstream/Downstream
GND select link on the IDC set to Downstream in order to ensure that only one end of each
segment is grounded. See Figure 3 below. The SCRN terminal is grounded within the RLC.
RLC Jbus RS-422
TX-A
TX-B
RX-A
RX-B
SCRN
First IDC
RS-422 Comms
Upstream Comms
TX-A
TX-B
RX-A
RX-B
SCRN
TX-A
TX-B
RX-A
RX-B
SCRN
Downstream Comms
Figure 3. RS-422A Connection details.
All Further IDCs
RS-422 Comms
Upstream Comms
TX-A
TX-B
RX-A
RX-B
SCRN
TX-A
TX-B
RX-A
RX-B
SCRN
Downstream Comms
(To Upstream Port of Next IDC/IPC)
When discussing JANUS communications, the convention has been adopted that
upstream is towards the host computer and downstream is away from the host.
Power Supply
The power supply connections from the RLC should be taken from the OUTPUT + and
OUTPUT - terminals on the PSU. Connection to the RLC is made via the Molex 3-pole
connector on the board (see Figure 4). Care should be taken to ensure that polarity is not
reversed. The OUTPUT - terminal of the power supply should also be grounded to the chassis
earth via the mounting stud.
RLC Power IN
10-14V DC
200mA
+12V
S
GND
Red
Blue
Green
Molex 3-pole
connector
IDC PSU
LED
Figure 4. Power supply connections.
Page 8 of 11 PM004R02 – November 2001
Grosvenor Technology Ltd © 2001