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Det-Tronics OPECL Infrared Hydrocarbon Gas Detector User Manual

Page 18

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16

95-8556

10.1

24 VDC

+

24 VDC

+

–24 VDC

–24 VDC

+24 VDC

+24 VDC

CALIBRATE

+ 4-20 MA

– 4-20 MA

RS-485 A

RS-485 B

RELAY POWER

FAULT

LOW ALARM

HIGH ALARM

1

2

3

4

5

6

7

8

9

10

11

12

13

NO USER CONNECTION

+

4 to 20 MA

B2053

*

TOTAL LOOP RESISTANCE = 250 OHMS MINIMUM, 600 OHMS MAXIMUM.

*

Figure 15—Detector Wired for Isolated 4 to 20 ma Current Output

(Sourcing)

24 VDC

+

24 VDC

+

–24 VDC

–24 VDC

+24 VDC

+24 VDC

CALIBRATE

+ 4-20 MA

– 4-20 MA

RS-485 A

RS-485 B

RELAY POWER

FAULT

LOW ALARM

HIGH ALARM

1

2

3

4

5

6

7

8

9

10

11

12

13

NO USER CONNECTION

+

4 to 20 MA

B2052

*

TOTAL LOOP RESISTANCE = 250 OHMS MINIMUM, 600 OHMS MAXIMUM.

*

Figure 14—Detector Wired for Isolated 4 to 20 ma Current Output

(Sinking)

–24 VDC

–24 VDC

+24 VDC

+24 VDC

CALIBRATE

+ 4-20 MA

– 4-20 MA

RS-485 A

RS-485 B

RELAY POWER

FAULT

LOW ALARM

HIGH ALARM

NO USER

CONNECTION

1

2

3

4

5

6

7

8

9

10

11

12

13

A2203

24 VDC

+

250 TO 500 OHMS

Figure 17—Wiring the Model OPECL for Benchtop Testing/

Programming Using HART Protocol

–24 VDC

–24 VDC

+24 VDC

+24 VDC

24 VDC SHIELD

24 VDC SHIELD

COM 1 A

COM 1 SHIELD

COM 1 B

COM 2 A

COM 2 B

COM 2 SHIELD

CALIBRATE

1

2

3

4

5

6

7

8

9

10

11

12

13

A2087

Figure 16—Wiring Terminal Identification

for Eagle Quantum Premier OPECL