User's Guide for
MR803D, MR853D, MR903D and MR1903D
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 8
13.3. 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.
Output2: This optocoupler output, which is signalling
the operating condition, represents the same
functionality as LED1.
open
power feed out of defined window
or
LO-Alarm
or
temperature-alarm
close
normal operation condition
Output3: This optocoupler output, which is signalling
the ALC condition, represents the same
functionality as LED2.
open
ALC-Alarm, ALC active
close
normal operation condition
14. Heartbeat
Setting
In a remote monitoring system, heartbeat signalling is
a very useful method to monitor whether the
supervision connection to a device is still operational.
Without heartbeat signalling, there would be no
indication if the supervision connection failed.
The heartbeat interval can be set by means of a rotary
switch, which is accessible on the top of the
miniRepeater. 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
.
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
miniRepeater with cover
15. List of Changes
Version Changes
Release
Date
M0041AMA
07-Feb.-06
M0041AMB - Mikom GmbH
changed its name
into Andrew Wireless
Systems GmbH
- Chapter
- Chapter
- Chapter
21-Nov.-06
Collector-emitter voltage......50 V max
Collector current..................20 mA max
Collector-emitter voltage......50 V max
Collector current..................20 mA max
output voltage.......4.75 to 5.25
output current.......20 mA
1kOhm
+5
Position of the rotary
switch for setting of
heartbeat interval
