Vanner EM-70D User manual

A94319-BVanner, Inc.
GENERAL
SPECIFICATIONS
ELECTRONIC MONITOR EM-70D
Owner's Manual
The EM-70D Electronic Monitor is a device desi ned to monitor several critical functions in the electrical system of a vehicle that operates
on a 24 volt system. It will also monitor the 12 volt service when usin a Vanner VoltMaster Battery Equalizer which supplies 12 volt service
from a 24 volt source.
CHARACTERISTICS
The EM-70D can function in a variety of ways:
1. The monitor functions as an alternator monitor when the Battery Balance lamp output and +12 volt monitor input
terminals are not in use.
2. The monitor functions as a device to control a field current relay, shuttin down the field current if the volta e re ulator fails
in the full field mode. This function is accomplished by connectin the EM-70D as normal and installin a latchin field
current relay to the Battery Hi h lamp output terminal.
In all cases the lamp outputs in the EM-70D are desi ned to provide the round connection for lamps (or buzzers, beepers, relays) under a
fault condition. The lamp outputs have also been desi ned so they may be paralleled should the installer wish to have fewer than three (3)
indicator lamps in service. If this is done, the output current remains at 0.375 amps (375 milliamps). It is possible to install momentary li ht
test switches (or just one (1) li ht test switch provided three (3) isolatin diodes are installed) so as to enable the operator to check the
lamps to determine if they are functionin .
INSTALLATION
When installin the EM-70D, locate a dry, flat surface that will accommodate the four mountin holes. Even thou h the unit is potted and
completely sealed, it is preferable to locate the monitor in as clean a location as possible. Since the current levels are in the milliamp ran e,
it is permissible to use 18 au e wire at all seven spade terminals. When connectin the three (3) monitor input leads to the system, it is
important to note that the connections should be made to the wirin system as close to the battery terminals as possible. This will allow the
EM-70D to monitor the condition of the wirin and terminals in the system and alert the operator if a problem develops. Should these three
(3) wires be connected to the three terminals on the equalizer, the EM-70D will only monitor the equalizer volta es and will not respond to
wirin or termination problems.
IGNITION SYSTEM INPUT: 24VDC (Minimum 18VDC, Maximum 35VDC)
ARNING LAMP TRIP LEVELS: Battery System High - greater than 30VDC
Battery System Low - less than 24VDC
Battery Balance - greater than INPUT + 6% OR less than INPUT - 6%
ARNING LAMP* OUTPUT: Open collector style, 0.375 amps (375 milliamps) maximum
*Also applies to buzzers, beepers, relays, etc.
2 2

Installation Schematic
Corporate Office: 4282 Reynolds Drive • Hilliard, Ohio 43026 • Tel [phone] • Fax [phone] • www.vanner.com
Specifications subject to change without notice.
Battery Low
1. Battery voltage drops below 24vdc
- Check alternator outptut
- Check alternator regulator
- Check battery connections
- Check battery cells
- Check Battery Equalizer connections
Battery High
1. Battery voltage exceeds 30VDC
- Check alternator output
- Check alternator regulator
- Check battery connections
Warnin Lamp Definitions - Lamps will low under the followin conditions
Battery Balance
1. Batteries out of balance. (greater than 1.5 volt difference beween the two batteries)
- Check fuses in Battery Equalizer cables
- Check Battery Equalizer connections
- Check battery connections
- Check Equalizer cables for proper gauge
2. Demand for 12v power exceeds Battery Equalizer rated output causing batteries to go
out of balance
- Reduce 12v loads
- Install larger or additional Battery Equalizer
3. Equalizer not functioning properly
- Perform on-vehicle test from troubleshooting guide in Equalizer Owner's Manual.
- If inoperable, replace the Battery Equalizer.
Quick Connects
........ +24v IGN SW ...... ...
.............. GND .............. ...
.............. +12V .............. ...
.............. +24V .............. ...
......... BATT LOW ....... ...
......... BATT HIGH ....... ...
..... BATT BALANCE .... ...
..... POWER ON LED .. ...
+24V IGN. SW.
GROUND
+12VDC
+24VDC
MONITOR
INPUT
BATT LO
BATT HIGH
BATT BALANCE
LAMP
OUTPUT
POWER ON
System Monitors
Model EM70D
ELECTRICAL SYSTEM
MONITOR
Con rol Inpu : +24VDC
Ou pu : 0.375 Amps (per erminal)
Trip Levels: Ba ery Balance Inpu Vol age ÷ 2 ±6%
Ba ery Sys em High 30.3V
Ba ery Sys em Low 23.7V
All Trips Have A 5 Sec. Time delay
EM-70D
24V
Load
24V
GND
Vanner
Battery
Equalizer
Optional
Load Disconnect
Switches
+
-
Battery
A
+
-
Battery
B
Battery Balance
Battery Hi h
Battery Low
GND
12V
12V
24V
+24v I nition
+ Volta e
for Lamps 1 Amp Fuse
12V
Load
24V
Alternator
1 Amp
Fuse
1 Amp
Fuse
1 Amp Fuse
0.75 6.63
3.03.32
0.25
4.0 4.5
4 holes 0.17 dia for #8
screw