Introduction
The BED-108/2 is a distribution unit made for use
with simplex RS485 or RS422 signals.
The BED-108/2 can be used in connection with all
Ernitec Telemetry Receivers series BDR-5XX and
BDR-9XX.
Using the BED-108/2 it is possible to change a
Daisy chain configuration to a Star configuration
or a combination of both.
BED-108/2 can also be used as a repeater or as a
booster for the Telemetry Receivers BDR-51X or
BDR-91X which are normally working up to 1200
m. Using the BED-108/2 transmission distance up
to 5000 m can be achieved.
Installation
Box Installation
The BED-108/2 should be mounted at a suitable location where mains is available.
The box should be mounted on a plane surface to avoid twisting of the box, resulting in
possible leakage.
PWR
X1
X3
MAINS IN
X2
N L
MAINS
SELECT
F5
CC NC NO
Power Fail
Detect
ERNA
IN
- +
- +
1
Ih 140
265VAC
DANGER
ACHTUNG
230
11
5
S1
Ih 1100
F6
XA1
XB1
- +
ERNA OUT
- +
- +
2
3
4
- +
5
- +
6
- +
7
- +
8
+10V
ON
0498-00053 V.0.1
XG1
XC1
XD1
XE1
XF1
H1
H2
TP1
TP2
XH1
DATA
TP3
ERNITEC
BED-108/2 RS-485 Distribution
If the box is mounted on a concrete or similar surface, use rawlplugs and galvanised
roundhead 1" screws such as no. 8 (ø4.1 x 25 mm).
If the box is mounted on a wooden surface, use galvanised roundhead 3/4" screws no. 8
(ø4.1 x 19mm) or similar.
When mounted outside, the box should be fixed with the cable glands pointing down.
Installation Instructions BED-108/2
Page 2
3020-00041
POWER
500 series
500 series
500 series
500 series
BED-108
1200 m
5000 m
BDR-51X = 1200 m
BDR-55X = 5000 m
5000 m
5000 m
