ERNITEC BED-108/2 Installation Instructions Manual
Installation Instructions
BED-108/2
Simplex RS485 Distribution Amplifier
3020-00041
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
X1X3
MAINS IN
X2
NL
MAINS
SELECT
F5
CC NC NO
Power Fail
Detect
ERNA
IN
- +
- +
1
Ih 140
265VAC
DANGER
ACHTUNG
230
1
1
5
S1
Ih 1100
F6
XA1 XB1
- +
ERNA OUT
- +- +
234
- +5- +6- +7- +
8
+10V
ON
0498-00053 V. 0.1
XG1XC1 XD1 XE1 XF1
H1H2
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
Mains Installation
The BED-108/2 must be used with a 3-wire mains connection (2W+PE @ min. 0,75mm2).
Terminals marked with hazardous live symbol requires installation by an instructed person.
Details on the mains supply can also be found on a label fitted inside the lid of the
BED-108/2.
If permanently connected to mains, a readily accessible disconnect device shall be incorporated in the building installation wiring.
If pluggable connection to mains, the socket-outlet shall be installed near the equipment and
shall be easily accessible.
Cable connections
It is of utmost importance that all cable connections are carried out, exactly as described in
order to avoid malfunction or damage to the BED-108/2, or the connected equipment.
All cables to and from the BED-108/2 are fed through the cable glands. Choose an
appropriate size gland for the actual cable and tighten the glands when all cables are
connected.
The choice of cable is important to the optimal function of the BED-108/2.
01
02 03
04
06
07
08
09
10 11
05
Cable glands layout
The following table shows how the cable glands are intended to be used:
RS485 output cable 8PG 911
RS485 output cable 7PG 910
RS485 output cable 6PG 99
RS485 output cable 5PG 98
RS485 output cable 4PG 97
RS485 output cable 3PG 96
RS485 output cable 2PG 95
RS485 output cable 1PG 94
RS485 input cablePG 93
Power failure cablePG 92
Mains input cablePG 161
DescriptionSizeNo.
Installation Instructions BED-108/2
3020-00041 Page 3
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