Output Wiring – Model 2700 Configurable I/O Transmitters

Figure 6-15Recommended pull-up resistor versus supply voltage – External power

 

4400

 

 

 

 

 

 

4200

 

 

 

 

 

(Ohms)

4000

 

 

 

 

 

3800

 

 

 

 

 

3600

 

 

 

 

 

3400

 

 

 

 

 

range

 

 

 

 

 

3200

 

 

 

 

 

3000

 

 

 

 

 

resistor

 

 

 

 

 

2800

 

 

 

 

 

2600

 

 

 

 

 

2400

 

 

 

 

 

up

 

 

 

 

 

2200

 

 

Recommended

 

-

 

 

 

 

pull

2000

 

 

 

 

 

resistor value range

 

1800

 

 

 

 

 

 

 

 

External

 

 

 

 

 

1600

 

 

 

 

 

1400

 

 

 

 

 

1200

 

 

 

 

 

 

 

 

 

 

 

 

1000

 

 

 

 

 

 

800

 

 

 

 

 

 

600

 

 

 

 

 

 

400

10

15

20

25

30

 

5

Supply voltage (Volts)

Note: When using a discrete output to drive a relay, choose external pull-up to limit current to less than 500 mA.

6.6Discrete input wiring

Discrete input wiring depends on whether you have configured terminals 5 and 6 (Channel C) for internal or external power. The following diagrams are examples of proper wiring for these configurations.

If external power is configured, power may be supplied by a PLC or other device, or by direct DC input. See Table 6-2for input voltage ranges.

Table 6-2Input voltage ranges for external power

VDC

Range

 

 

3–30

High level

 

 

0–0.8

Low level

 

 

0.8–3

Undefined

 

 

50

Micro Motion® Model 1700 and 2700 Transmitters

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Image 54
Emerson 1700, 2700 installation manual Discrete input wiring, 2Input voltage ranges for external power