RS-485 connection to SYSTEM 500M/1000M
Connect the RS-485 cable to socket 1-13 (refer to figure 1):
SYSTEM 500M/1000M Keyboard 580M/1801M/1802M
Pin Description Pin Description
6 or 8 Positive signal 6 or 8 Positive signal
7 or 9 Negative signal 7 or 9 Negative signal
1, 4 or 5* GND (Connect to cable screen) 1, 4 or 5* GND (Connect to cable screen)
Remember to terminate the RS-485 line in both ends of the cable. This is done by setting the
belonging small switches to the 120 Ωor 100 Ωposition corresponding to the characteristic
impedance of the cable used, refer to fig. 1-14. Make sure, that only the first and the last
physical unit on the cable is terminated, refer to figure 2 for termination instructions. On all
other units the termination switches should be set to the OFF position.
Maximum cable length is 1200 metres.
It is recommended to use high quality twisted pair cable designed for data transmission.
*Connection of cable shield/screen is optional and will normally not be needed.
RS-485 connection to telemetry receivers Series BDR-500, the ICU and BED-108
Connect the RS-485 cable to socket 1-13 (refer to figure 1):
Series 1500 BDR-550/1 BDR-510/4 BDR-511/2/3 BDR-575 ICU BED-108
Pin Desc. Pin Desc. Pin Desc. Pin Desc. Pin Desc. Pin Desc. Pin Desc.
6 or 8 Pos. *X5- PCM IN- X7+ CTRL IN+ X12+ PCM IN+ 2N/A 1COM+ X3+ ERNA+
7 or 9 Neg. *X5+ PCM IN+ X7- CTRL IN- X12- PCM IN- 1N/A 2COM- X3- ERNA-
1, 4, 5 GND Do NOT connect!
Details on interconnecting various types of telemetry receivers and termination of the RS-485
line can be found on figure 3.
Telemetry Receivers Series BDR-51X and BDR-55X and the BED-108 Control Signal Distributor
Unit will terminate the RS-485 properly by themselves when installed in the correct daisy chain
configuration and do not require additional line termination. The ICU and the BDR-575 are
bus-connected and consequently the line must be terminated, on the ICU with an external
resistor, on the BDR-575 by enabling the RS-485 LK1 jumper on the interface board.
Different types of telemetry receivers can also be mixed on the common control line.
Remember, that each telemetry receiver/ICU must have an unique address equal to the camera
number minus 1, refer to the relevant telemetry receiver manual. Also the Series 1500
keyboard must be set for direct control of telemetry receivers (CamCrtl), refer to the Set-up
section located later in this manual.
Maximum cable length is 1200 metres. However, telemetry receivers Series BDR-51X and
BDR-55X as well as the BED-108 features an active control signal repeater allowing further
3000 meters (BDR-51X further 1200 meters) distance to the next unit.
Installation and Setup instruction for Keyboard Series 1500
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