Discrete Input Wiring - Emerson MICRO MOTION 2700 Installation Manual

Output Wiring – Model 2700 Configurable I/O Transmitters
Figure 6-15 Recommended pull-up resistor versus supply voltage – External power
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6.6

Discrete 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 6-2 for input voltage ranges.
Table 6-2 Input voltage ranges for external power
VDC
3–30
0–0.8
0.8–3
50
5 10
Note: When using a discrete output to drive a relay, choose
external pull-up to limit current to less than 500 mA.
15
Supply voltage (Volts)
Range
High level
Low level
Undefined
Recommended
resistor value range
20 25
®
Micro Motion Model 1700 and 2700 Transmitters
30