|Power supply ground||Can also be used for grounding the transmitter. There is also an external grounding terminal on the bottom of the transmitter enclosure.|
|24 V -||Negative supply voltage||15 … 30 V DC 1 or 24 V AC ±10 % 50/60 Hz|
|24 V +||Positive supply voltage|
1 When used with the HMP7 probe, the minimum required power supply input is 18 V DC.