IM-P736-02 EMM Issue 3
45
VLM30 In-Line Vortex Flowmeter
Fig. 29 VLM30E Terminals
Terminal Function/comment
PWR + Power supply.
PWR -
A (+)
Modbus
®
interface RS485.
B (-)
DIGITAL OUTPUT 1+ Digital output, positive pole.
DIGITAL OUTPUT - Digital output, negative pole.
DIGITAL OUTPUT + Analog output, positive pole.
DIGITAL OUTPUT - Analog input, negative pole.
3.19.2 Power Supply
Devices with Modbus
®
communication
Terminals PWR +/PWR –
Supply voltage 9 to 30 Vdc
Residual ripple Maximum 5% or U
SS
= ±1.5 V
Power consumption < 1 W
U
SS
Peak-to-peak value of voltage
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