MPM_DMS-EB2_D00
Page 1 of 4
D I G I T A L P A N E L M E T E R S
DMS-EB2
Multi-Purpose Application Board
for DMS-20PC/LCD Meters
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.
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
Figure 1. DMS-EB2 Schematic Diagram
U1
+V
IN
+V
OUT
1
2
3
4 5
6
SG15
(–) INPUT LO
(+) INPUT HI
ANALOG�
COMMON�
TEST/HOLD
�
REF. OUT
REF. IN
12
11
8
7
10
9
SG3
SG2
SG1
DP 3
DP 2
DP 1
+5V SUPPLY/�
+BATTERY
�
3
4
5
6
2
1
5V RETURN/�
–BATTERY
�
DISPLAY�
ENABLE
�
LM7805CT
+
C2
10µF
35V
GND
SG5
C1
1.5µF, 50V
SG14
SG10
R2
R1
R3
+5V SUPPLY/�
+BATTERY
(Close for�
Offset Adjust)
SG6
SG4
(+) (–)
+V
GND
HI LO
TST/�
HOLD�
IN
TST/�
HOLD�
OUT
–V
Components are user-supplied �
and not part of the standard product
SG7-SG9 and SG11-SG13 are not used.
J1
J2
Closed solder gap
Open solder gap
R1
R2
R5
U1
SG15
SG14 SG6 SG5
J1
SG4
SG3
SG1
SG2
C1
+C2
1
SG10
12
1
2
3
4 5
6
J2
For updated, full-size data sheets visit: www.cd4power.com
For full details go to
www.cd4power.com/rohs
