8
1. Always use safe power practices when making power connections. Be sure to remove fuses from
the fuse distribution panel, as well as the back of the BVM, before making your power connections.
2. Use the grounding lug to connect the unit to earth ground. The grounding lug is next to the symbol
. Insert the eyelet of the earth ground cable between the two bolts on the grounding lug (Ground cable
not included).
3. Insert a battery ground into the power connector plug's right terminal and tighten the screw; then
insert a battery line to the plug's left terminal and tighten its screw.
4. Insert a fuse into the fuse distribution panel and measure voltage. The voltmeter should read between
–40 and –70VDC (for -48VDC build option) or -18 and -36VDC (-24VDC build option).
5. The power plug can be inserted into the power connector only one way to ensure the correct polarity.
Note that the negative voltage terminal is on the left and the GND terminal is on the right.
6. Insert fuse into the Power A fuse slot. The power LED should be lit green. If the LED is red, the power
connection is reversed. To confirm that power is correctly connected, the front panel LEDs will flash
RED and GREEN, indicating that the firmware is booting up.
7. Repeat steps 1 -6 for Power B connector.
LAN Connection
6.2
To connect the BVM 48 to the LAN, insert a standard RJ45 Ethernet cable into the 10BaseT Ethernet
port on the back of the unit. If the LAN connection is OK, the LNK LED will light
SOLID GREEN
.
Serial Connection
6.3
The BVM has one RS-232 expansion port located on the back panel of the unit. This port is used to
daisy-chain several BVM's together, allowing you to assign a single IP address to them all while
monitoring the voltage of more devices.
Multi-Purpose Analog Inputs
6.4
The BVM's 3 multi-purpose analog inputs measure continuous ranges of voltage or current. Analog
alarms are typically used to monitor battery voltage, charging current, temperature, humidity, wind
speed, or other continuously changing conditions. The measurement range of the analog channels is –
90 to +90 VDC or 4 to 20 mA. To configure the analogs for current sensing (4 - 20mA) please review
the section "How to Setup User Analogs" for info on jumper position.
You can use analogs 1 through 3 to monitor whatever you like. The BVM also has 3 integrated analogs
pre-configured to monitor temperature.
The 4-pin connector is a screw terminal barrier plug, similar to the power connector. To
connect analog inputs, remove the connector plug, connect the leads to the appropriate
terminals and reinsert the barrier plug. Note that the plug can be inserted into its socket
only one way, so make sure it can only be reinserted with the alarm inputs aligned
correctly.
By default, the analog inputs are configured to measure voltage. You can switch the analog inputs to
measure current by resetting jumpers on the BVM's circuit board.
