User's Guide MR2003B/D
Andrew Wireless Systems GmbH * Industriering 10 * 86675 Buchdorf * Germany *
Phone: +49 9099 69-0 * Fax: +49 9099 69-930 *
email: [email protected] * http://www.andrew.com
Page 6
11.3. Output-Contact
Descriptions
Output1: This is a transistor output for heartbeat
signalling. The heartbeat interval can be
set in the 1-to-72-hours range.
12. Heartbeat Setting
The heartbeat interval can be set by means of a rotary
switch which is accessible on the MR2003 top. Use a
small screwdriver to turn the switch carefully to the
position for the required interval (1
to 72 hours)
according to the label in the cover
.
For the position of
the label in the cover see illustration
MR2003D with
cover
and
MR2003B with cover
.
0
not allowed
2
1 h
A
24 h
1
not allowed
3
2 h
B
30 h
4
3 h
C
36 h
5
4 h
D
48 h
6
5 h
E
60 h
7
6 h
F
72 h
8 12
h
9 18
h
Heartbeat-switch settings
MR2003D with cover
MR2003B with cover
MR2003B
In a remote control system, heartbeat signalling is a
very useful method to monitor whether the supervision
connection to a device is still alive. Without heartbeat
signalling, there would be no indication in case the
supervision connection broke down and the OMC
would show no alarm because it no longer received
any information.
For simple remote control, a standard SMS alarm
transmitter is provided. Connecting this SMS alarm
transmitter to the heartbeat signalling output will
initiate regular SMS sending to the OMC, thus,
indicating that the connection to the device is still alive
and able to report an alarm if there is one. If the
connection is down or the device is malfunctioning,
there will be NO heartbeat SMS and an alarm is
raised at the OMC.
Output2: This optocoupler output, which is signalling
the operating condition, represents the same
functionality as LED1.
Collector-emitter voltage......50 V max.
Collector current..................20 mA max
output voltage........4.75 to 5.25 V
output current........20 mA max
1kOhm
+5
Position of the rotary
switch for setting of
heartbeat interval
Position of the rotary
switch for setting of
heartbeat interval
