C&D Technologies DATEL DMS-EB2 Quick Start Manual

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FEATURES
Gain (span) adjustment
■
Input divider network for attenuating voltages
■
up to 250Vdc
Operate meter and board from +5V supply or
■
9/12V battery
On-board solder gaps for decimal point placement
■
On-board I/O connector for easy power and signal input
■
12
(–) INPUT LO
11
(+) INPUT HI
10
ANALOG
COMMON
9
TEST/HOLD
8
REF. OUT
7
REF. IN
Components are user-supplied

and not part of the standard product
SG7-SG9 and SG11-SG13 are not used.

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SG10
SG14

R2

R1
SG6
SG15

R3
(Close for
Offset Adjust)
+5V SUPPLY/
+BATTERY
Figure 1. DMS-EB2 Schematic Diagram
The DMS-EB2 Application Board was designed for quick and easy application/evalu-
ation of DATEL's subminiature DMS-20PC/LCD Series, 3½ Digit, LED/LCD Display, Digital
Panel Voltmeters. The DMS-EB2's versatility, low cost and direct DMS-20PC/LCD plug-in
compatibility makes interfacing a breeze. The DMS-EB2 covers many common panel-
meter applications while providing easy signal and power I/O terminations (via a standard
MOLEX connector) and plug-in versatility when changing from one application to another.
The DMS-EB2 has provisions for such common applications as input dividers for high
input voltages, gain (span) adjustment, 9/12Vdc battery operation, and decimal point place-
ment. The board permits direct signal I/O wiring via the interface connector or soldering
directly to the board. The DMS-EB2 is fully compatible with all four versions of the DMS-
20PC/LCD (±200mV, ±2V, ±20V, ±200V) making it interchangeable from meter to meter
and application to application. Solder gaps
are conveniently placed on the board and
may be quickly bridged or cut as required.
This low-cost addition to DATEL's
expanding line of subminiature meters dem-
onstrates our continuing commitment to offer
the most versatile, easy-to-use panel-meter
products.
+V
OUT
SG4
U1
+V
IN
1.5µF, 50V

C1
SG5
J2
J1
1 2 3 4 5 6
HI LO
+V –V
(+) (–) GND
TST/ TST/
HOLD HOLD
IN OUT
Multi-Purpose Application Board
for DMS-20PC/LCD Meters
12
R1
R2
SG14 SG6
R5
C1
J1
SG15
1 2
J2
1
+5V SUPPLY/
+BATTERY
LM7805CT
2
DISPLAY
GND

ENABLE
3
+ 5V RETURN/
–BATTERY

C2
10µF
SG3
35V
4
DP 3
SG2
5
DP 2
SG1
6
DP 1
Open solder gap
Closed solder gap
D I G I T A L P A N E L M E T E R S
MPM_DMS-EB2_D00
DMS-EB2
1
SG10
SG5 SG4
+C2
U1
3 4 5 6
SG1
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