DPM 40
3½ Digit LED Module
A compact low-cost LED module ideally suited for applications where a bright display under all conditions is required. The DPM 40 is
fitted with high efficiency LEDs and supplied with a filter and bezel to give a high contrast display. The small size and low cost of the
unit makes it very suitable for high volume OEM applications.
11mm (0.43“)Digit Height
Programmable Decimal Points
Auto-zero
Auto-polarity
200mV d.c. Full Scale Reading (F.S.R.)
Display Hold
SCALING
Two resistors Ra and Rb may be fitted in order to
alter the full scale reading (F.S.R.) of the meter - see
table.
The meter will need re-calibration .
Required F.S.R.
2V
20V
200V
2kV
200µA
2mA
20mA
200mA
Note
Note
Note
Note
Ra
DPM 40
Specification
Accuracy (overall error) *
Linearity
Sample rate
Operating temperature range
Temperature stability
Supply voltage
Supply current
Input leakage current (Vin = 0V)
Rb
910k
1M
1M
1M
LINK
LINK
LINK
LINK
Stock Number
Standard Meter
100k
10k
1k
100R
1k
100R
10R
1R
Min.
Typ.
Max.
0.05
0.1
±1
3
0
50
150
5
100
1
4.5
5.5
200
10
Unit
% (±1 count)
count
samples/sec
°C
ppm/°C
V
mA
pA
* To ensure maximum accuracy, re-calibrate periodically.
NOTE
Ensure that link across Ra is OPEN.
DIMENSIONS All dimensions in mm (inches)
a
72 (2.83)
b
c
36 (1.30)
a. 4.0 (0.16)
b. 12.0 (0.47)
c. 8.5 (0.33)
18 (0.71)
Viewing Area
45.5 (1.79)
Panel cut-out 68 x 33 (2.68 x 1.30)
62 (2.44)
Ø2.2
(0.09)
+5V
COM
IN HI
IN LO
0V
30.5 (1.20)
68 (2.68)
27 (1.05)
Ra
DP1
DP2
DP3
CLOCK
DP COM
33 (1.30)
24 (0.94)
Rb
SCALING RESISTORS
LASCAR ELECTRONICS LTD.
LASCAR ELECTRONICS INC.
MODULE HOUSE, WHITEPARISH,
WILTSHIRE SP5 2SJ UK
TEL: +44 (0)1794 884567 FAX: +44 (0)1794 884616
E-mail: sales@lascar.co.uk
LASCAR ELECTRONICS (HK) LIMITED
3750 West 26th Street,
Erie, PA 16506 USA
TEL: +1 (814) 835 0621 FAX: +1 (814) 838 8141
E-mail: us-sales@lascarelectronics.com
FLAT C, 5/FL., LUCKY FTY. bldg., 63-65 HUNG TO ROAD
KWUN TONG, KOWLOON, HONG KONG
TEL: +852 2797 3219 FAX: +852 2343 6187
E-mail: b4lascar@samsongroup.com.hk
PIN FUNCTIONS
A.
B.
C.
D.
DP1
DP2
DP3
CLOCK/
HOLD
E. DP COM
1. +5V
2. COM
199.9
19.99
1.999
Connect to 0V to hold display reading. Leave open for normal operation.
3. IN HI
4. IN LO
5. 0V
Connect to Pin A, B or C to select required DP.
Positive power supply input.
The ground for the analogue section of the converter, held actively at 2.8V (nom) below +5V. This pin is for use only when the module
is used with a fully floating supply. It should on no account be connected to any other terminations or circuitry except as specified in
the relevant operating modes.
Positive measuring input.
Analogue inputs must be no closer than 1V to the positive supply or lower than 1.5V below 0V.
Negative measuring input.
Negative power supply input.
SAFETY
To comply with the Low Voltage Directive (LVD 93/68/EEC), input voltages to the module’s pins must not exceed 60Vdc. If voltages to the
measuring inputs do exceed 60Vdc, then fit scaling resistors externally to the module. The user must ensure that the incorporation of the
DPM into the user’s equipment conforms to the relevant sections of BS EN 61010 (Safety Requirements for Electrical Equipment for
Measuring, Control and Laboratory Use).
VARIOUS OPERATING MODES
INPUT
VOLTAGE
+
3
-
4
1
+5V
+5V
+5V
IIN
1
3
IN HI
IN LO
6R2
220k
5k
0V
SET
ZERO
IOUT
5
+5V
IN HI
4
IN LO
2 COM
0V
5
0V
0V
Measuring 4-20mA to read 0-999.
Operation with input referenced to panel
meter supply (single ended).
3
4
R
2
R= 0.2
IFSR
+5V
1
+5V
IN HI
INPUT
VOLTAGE
IN LO
+
3
-
4
2
COM
0V
+5V
1
+5V
IN HI
IN LO
COM
0V
5
5
0V
0V
Measuring current.
Specifications liable to change without prior warning
Operation with input floating with respect to
power supply.
DPM 40
Issue 4
August/2002
M.C.
Applies to DPM 40/6