DPM 742-BL 4-20mA Loop Powered Indicator with Backlighting
PRODUCT DESCRIPTION
The DPM 742-BL gives an accurate, zero adjusted indication of a 4-20mA current. Calibration is by two multi-turn
potentiometers which allow sensitive adjustment of the instrument over a very wide range. Decimal points are jumper
link selectable. LED
backlighting ensures excellent readability under low light conditions. Connection is via screw terminals. The module's
low cost means it will suit high and low volume applications. This module is supplied with a plastic mountingbezel. A
waterproof seal to IP67/ NEMA 4X isachievable, using the optionalBEZ 700-IP metal bezel.
FEATURES
• 12.7
mm (0.5") Digit Height
• 4-20mA Loop Powered Indication
• Low Volt Drop
•
Programmable Decimal Points
•
LED Backlighting (30mA @ 5V typ.)
• Bandgap Reference
• Wide Adjustment Range
• Auto-polarity on Display
• IP67 / NEMA 4X Protection via BEZ 700-IP
A low drift bandgap reference circuit ensures accurate readings over a wide temperature range.
ORDERING INFORMATION
Stock Number
Standard Meter DPM 742-BL
IP67 / NEMA 4X Bezel BEZ 700-IP
ELECTRICAL SPECIFICATIONS
Specification Min. Typ. Max. Unit
Accuracy (overall error) * 0.05 0.1 % (±1 count)
Linearity ±1 count
Sample rate 2.5 samples/sec
Operating temperature range 0 50 °C
Temperature stability 200 ppm/°C
Loop Volt Drop 5 5.6 V
Supply current 4 20 mA
Backlight supply voltage 4.75 5.0 ** V d.c.
Backlight supply current @ 5V d.c. 30 50*** mA
Full scale reading (@20mA) 0 1999 Count
Offset adjustment range -1900 +1900 Count
* To ensure maximum accuracy, re-calibrate periodically.
** An external series resistor is required above 5V, see Applications.
*** This specification linearly derates to 30mA @ 50°C.
LASCAR ELECTRONICS LTD.
MODULE HOUSE
WHITEPARISH
WILTSHIRE SP5 2SJ
UK
TEL: +44 (1794) 884567
FAX: +44 (1794) 884616
E-mail: sales@lascar.co.uk
Specifications liable to change without prior warning DPM 742-BL Issue 2 August/2004 M.C. Applies to DPM 742-BL/2
LASCAR ELECTRONICS INC.
3750 West 26th Street
Erie
PA 16506
USA
TEL: +1 (814) 835 0621
FAX: +1 (814) 838 8141
E-mail: us-sales@lascarelectronics.com
www.lascarelectronics.com
LASCAR ELECTRONICS (HK) LIMITED
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
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DPM 742-BL 4-20mA Loop Powered Indicator with Backlighting
DIMENSIONS
All dimensions in mm (inches)
34.5 (1.36)
64.5 (2.54)
Panel cut-out: 62.0 - 32.0
(2.44 - 1.26)
PANEL FITTING
Panel thickness: 1.0 - 3.0
(0.04 - 0.12)
25.0 (0.98)
53.0 (2.17)
46.7 (1.84)
60 (2.36)
2.8 (0.11) dia
30 (1.18)
17.7 (0.7)
6.1 (0.24)
1.6 (0.06)
13.0
(0.51)
8.25 (0.32)
13.5 (0.53)
Insulating
Washer
FUNCTIONAL BLOCK DIAGRAM
BL+
BL-
I+
I-
4-20mA
Vdc
8
1
Shake-proof
Washer
21
3
CONNECTIONS (rear view)
JA JB
Offset
DP
321
Span
Lk1
I+ I- BL+ BL-
Specifications liable to change without prior warning DPM 742-BL Issue 2 August/2004 M.C. Applies to DPM 742-BL/2
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www.lascarelectronics.com
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