Measurement Computing WaveBook rev.3.0 - Manual (Page 92)

4-8 System Power & Assembly WaveBook User’s Manual
Hardware Setup
Configuration
DBK34’s Screw Terminal Board, TB1
DBK34’s screw terminals read from right to left when
viewed from the front panel (see figure).
For 12 Volt Operation:
(1) Remove jumper from terminals 8 and 7, if present.
(2) Use a jumper to short terminals 9 and 8
(3) Use a jumper to short terminals 7 and 6
For 24 Volt Operation:
(1) Remove jumpers from terminals 9 and 8, if present
(2) Remove jumpers from terminals 7 and 6, if present.
(3) Use a jumper to short terminals 8 and 7.
Power
Note: Refer to the above figure, as needed.
Power In (for vehicle main/auxiliary batteries, 12 or 24 VDC only). Connect main battery positive to
terminal 3 of TB1 and main negative to terminal 4. If an auxiliary battery is used, connect its positive to
terminal 1 and negative to terminal 2.
Power Out. The figure shows the pinout for the POWER OUT DIN5
connectors. The DBK34 package includes a short connecting cable to connect
to the powered device. This cable connects the POWER OUT connector on
the DBK34 to the POWER IN connector on the WaveBook, LogBook,
DaqBook, or WBK/DBK module.
+24V/+12V
+24V/+12V
-RTN
-RTN
No con-
nection
DBK34's DIN5 power output
connectors (2 sockets)
1
4
2
5
3
Indicators. Three front-panel LED indicators provide power and charging status information.
LED Indicators & Descriptions
MAIN POWER Lights when the DBK34 is connected to a live vehicle (main) battery.
CHARGING Lights when internal batteries are being charged at a rate of 0.025 to 0.050 A or greater.
DISCHARGING Lights when internal batteries are discharging at a rate of 0.025 to 0.050 A or greater.
Runtime. Approximate runtime under various loads can be computed from the storage capacity (5 A-hr in
12 V mode; 2.5 A-hr in 24 V mode) and the load (main unit and other DBKs). See section Power
Management at the beginning of this chapter. Factory testing determined the following run-times:
Run-times & Load Conditions
240 minutes DBK34 with 1.20 watt external load @ 23°C
190 minutes DBK34 with 2.34 watt external load @ 23°C
120 minutes DBK34 with 6.79 watt external load @ 23°C
Charging. In general, lead-acid batteries require charging at 120% of drain energy (for example, the 5 A-hr
DBK34 requires a charge equal to or greater than 6 A-hr). Charging time varies but is typically 4 to 5 hours
at 14 V for a totally empty battery.
CAUTION CAUTION CAUTION CAUTION
Voltage applied to charge a DBK34 must not exceed 15 VDC in 12 V mode or 30 VDC
in 24 V mode. If not charging from the vehicle, a generic auto-battery charger (3 A) in
12-V mode is recommended.
CAUTION CAUTION CAUTION CAUTION
Environmental Concern. DBK34’s lead batteries contain toxic materials
(Pb and H
2
SO
4
). After the battery’s life cycle is over (up to 500 full cycles,
or 5-10 years of use), sealed-lead batteries must be properly discarded, or recycled.