User Manual

User's Guide for
MR803D, MR853D, MR903D and MR1903D
Andrew Wireless Systems GmbH * Industriering 10 * 86675 Buchdorf * Germany *
Phone: [phone] * Fax: [phone] *
email: [e-mail] * 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 1 changed
- Chapter 5 changed
- Chapter 7 changed
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 volta
g
e.......4.75 to 5.25
output current.......20 mA
1kOhm
+5
Position of the rotary
switch for setting of
heartbeat interval