DMS-30PC-4/20S-24BS-I データシートの表示（PDF） - DATEL Data Acquisition products

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DMS-30PC-4/20S-24BS-I

4-20mA Input 3½ Digit Panel Meters with Full-Size LED Displays

DATEL Data Acquisition products  

3 ½ D I G I T, 4 - 2 0 m A I N P U T, L E D D I S P L AY M E T E R S

DMS-30PC-4/20S

2. Desired display readings are:

ON

4mA = "–100"

12mA = "000"

20mA = "100"

1

2

3

4

56

7

8

Use DIP-switch setting #4. Apply 12mA and adjust R3 so the

display reads "000". Apply 20mA and adjust R7 so the display reads

"100". Apply 4mA and the display should read "–100". For these

display readings, no decimal points are used. Set SW5, SW6 and

SW7 to OFF.

CONNECTION DIAGRAMS

+24V

+

+

S IN G L E -E N D E D

T R A N S M IT T E R

–

4 -2 0 m A

(T B 1 -1 ) +

(T B 1 -2 ) –

24V G R O U N D

+ V (T B 2 -1 )

D M S -3 0 P C -4 /2 0 S -2 4 R L

– V (T B 2 -2 )

Figure 2. Typical Connections for Single-Ended Transmitters Driving

Single-Ended +24V Powered Meters.

3. Desired display readings are:

ON

4mA = ".000"

12mA = ".250"

1

2

34

56

7

8

This example is not as straightforward as the previous two. Notice that

12mA is exactly halfway between 4mA and 20mA. If we assume the

input could go up to 20mA, the display reading would be: 2 x .250 or

".500". From the table, we can select DIP-switch setting #2 and enable

DP1 via SW5. Apply 4mA and adjust R3 so the display reads ".000".

Apply 12mA and adjust R7 so the display reads ".250".

+24V

+

(T B 1 -1 ) +

– L O O P - P O W E R E D

T R A N S M IT T E R

4 -2 0 m A

(T B 1 -2 )

N .C .

–

+ V (T B 2 -1 )

D M S -3 0 P C -4 /2 0 S -2 4 R L

– V (T B 2 -2 )

24V G R O U N D

Figure 3. Typical Connections for Loop-Powered Transmitters

Driving Single-Ended Meters.

+24V

+ V (T B 2 -1 )

D M S -3 0 P C -4 /2 0 S -2 4 R L -I

(T B 2 -2 )

–V

+

+

S IN G L E -E N D E D

T R A N S M IT T E R

–

+ (T B 1 -1 )

4 -2 0 m A

(T B 1 -2 ) –

4 -2 0 m A

+

P LC orO TH E R

S IN G L E -E N D E D

D E V IC E

–

24V G R O U N D

Figure 4. Typical Connections for Isolated-Supply Meters

in Series with an Auxiliary Device

+24V

+

+

LO O P

T R A N S M IT T E R

–

4 -2 0 m A

(T B 1 -1 ) +

(T B 1 -2 ) –

24V G R O U N D

+5V

+ V (T B 2 -1 )

D M S -3 0 P C -4 /2 0 S -2 4 R L

– V (T B 2 -2 )

5V G R O U N D

Figure 5. Typical Connections for +5V Powered Meters. Note that 5V Ground

and 24V Ground are Tied Together Inside the Meter.

DATEL, Inc., Mansfield, MA 02048 (USA) • Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 • E-mail: sales@datel.com • Internet: www.datel.com

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