Emerson MMI-20016185 用户手册
Wiring the outputs
Figure 5-10
Wiring the discrete output for external power
A
B
A
A pull-up resistor, which must be of sufficient value to limit loop current to less than 500 mA depending on total loop
resistance at the transmitter
resistance at the transmitter
B
3 to 30 VDC power supply
Figure 5-11
Recommended pull-up resistor versus supply voltage (external power)
Wire the discrete input
Procedure
Use terminals 21 and 16 for the discrete input. See Figure 5-12 for wiring the discrete input.
The discrete input, frequency/pulse output, and discrete output share terminal 16 as a common return.
32
Micro Motion 9739 MVD Transmitters