PIN FUNCTIONS

1. 0V

Negative power supply input.

tive input for reference voltage.

4. IN HI

Positive measuring input.

5. COM

The ground for the analogue section of the converter, held actively at 3.05V (nom) below +5V. This pin is for use only when the module

is used with a fully floating supply.

. IN LO

Negative measuring input.

7. +5V

Positive power supply input.

8. DP3

1.999

9. DP2

19.99

Connect required DP pin to DP COM.

A negative supply is generated internally and mirrors the positive supply. For example: if V+ is +5V, then the internally

generated V- is -5V. When measuring with the input referenced to the same supply rail as that of the panel meter, then the limitations on

the input range are (V- + 1.5V) to (V+ - 1.5V).

2. RLO

Negative input for reference voltage.

3. RHI

Posi

6

10. DP1

199.9

11. DP COM

Connect to required decimal point (DP1, DP2 or DP3) to illuminate.

This pin is not fitted as standard to the DPM 340.

It should on no account be connected to any other terminations or circuitry except as specified in the relevant operating modes.

Note:

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

Specifications liable to change without prior warning

DPM 340

Issue 8

06/2010

S.L.

Applies to DPM 340/

Operation with input referenced to panel

meter supply (single ended).

+5V

+5V

IN HI

IN LO

0V

+

-

INPUT

VOLTAGE

0V

RLO

COM

7

1

4

6

5

2

Operation with input floating with respect to

power supply.

+5V

+5V

IN HI

IN HI

IN LO

IN LO

0V

+

+

-

-

INPUT

VOLTAGE

INPUT

VOLTAGE

0V

COM

RLO

COM

7

4

4

6

6

5

1

Measuring current.

+5V

+5V

IN HI

IN LO

0V

R

0V

COM

R= 0.2

IFSR

4

6

5

5

2

RLO

COM

7

1

Adding an external reference.

1. Cut Link Lref

2. Fit components as indicated above.

+5V

+5V

0V

0V

COM

COM

3

2

5

5

RLO

RHI

7

1

Measuring 4-20mA to read 0-999.

0V

IIN

6R2

SET

ZERO

220k

5k

IN HI

IN LO

COM

IOUT

0V

+5V

+5V

4

6

5

5

2

RLO

COM

7

1

22k

180k

15k

2k

8069

LASCAR ELECTRONICS LTD.

MODULE HOUSE, WHITEPARISH,

WILTSHIRE SP5 2SJ UK

TEL: +44 (0)1794 884567 FAX: +44 (0)1794 884616

E-MAIL: sales@lascar.co.uk

No.:695 - Page 2 of 2

LASCAR ELECTRONICS INC.

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ERIE, PA 16505 USA

TEL: +1 (814) 835 0621 FAX: +1 (814) 838 8141

E-mail: us-sales@lascarelectronics.com

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8th FLOOR, CHINA AEROSPACE CENTRE, 143 HOI BUN

ROAD, KWUN TONG, KOWLOON, HONG KONG

TEL: +852 2389 6502 FAX: +852 2389 6535

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