User Guide Part 2

Installing the RBS Main Unit Connecting the RBS Site Alarms
92-F0423-1 Ericsson Proprietary 4-7
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CAUTION
To prevent ground loops, equipment connected to input sensors must
be isolated from its chassis ground (reference).
Figure 4–3 Example Alarm Input Sensors and Output Relays Configuration
Note
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é +5 VDC open circuit voltage
é 5 mA max current
é 100 ohms max series resistance
(to sense closure)
Note: To prevent ground loops,
equipment connected to input
sensors must be isolated from
the chassis ground (reference).
Input
Output
Energize Relay
Alert BSM
AUX1 INPUT+
AUX1 OUTPUT Common
AUX1 OUTPUT Normally Closed
AUX2 OUTPUT Normally Open
AUX3 INPUT-
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1 1
9
10
9
10
AUX1 OUTPUT Normally Open
IN
J1
OUT
J2
AUX1 INPUT-
AUX4 INPUT+
AUX4 INPUT-
AUX5 INPUT+
AUX5 INPUT-
AUX2 INPUT+
AUX2 INPUT-
AUX3 INPUT+
AUX6 INPUT+
AUX6 INPUT-
AUX2 OUTPUT Common
AUX2 OUTPUT Normally Closed
(No Connection)
(No Connection)
FAA Light
(example
shown open)
UPS
(example
shown closed)
Warning Light
Warning Siren
Alarms Card
Alarms Card
Interface
é 100mA @ 48VDC
é 50mA @ 21 VAC RMS,
non-inductive
é 10 ohms max impedance for
contact closure
é 35V breakdown between
contacts and ground
Indicate to the BSM operator each
input device's normal state —
normally open or normally closed.
Indicate to the BSM operator each
output device's normal state —
normally open or normally closed.
AUX0 NO (1)
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1 1
9
10
9
10
RBS