Spirax Sarco VLM30 - Page 38

IM-P736-02 EMM Issue 3
38
VLM30 In-Line Vortex Flowmeter
3.18.2 Current output/HART
®
output, digital output and analog input
Fig. 22 Terminals for VLM30S and VLM30E with binary output
Terminal Function/comment
PWR/COMM+ Power supply, current.
PWR/COMMM -
Output-/HART
®
output.
EXT. METER Not asssigned.
DIGITAL OUTPUT 1+ Digital output, positive pole.
DIGITAL OUTPUT 2 Bridge after terminal 1+, NAMUR output deactivated.
DIGITAL OUTPUT 3 Bridge after terminal 4-, NAMUR output activated.
DIGITAL OUTPUT 4− Digital output, negative pole.
3.18.3 Power Supply
Devices with HART
®
communication
Terminals PWR/COMM +/PWR/COMM –
Supply voltage 12 to 42 Vdc
Residual ripple Maximum 5% or U
SS
= ±1.5 V
Power consumption < 1 W
U
SS
Peak-to-peak value of voltage