IM-P505-02-US Issue 1
31
UTM20 Series Ultrasonic Transit-time Flowmeters
Fig. 33 Power supply 20 to 28V AC
8.8 20 to 26V AC Power
The transmitter may be operated from a 20 to 26V AC source, as long as the source supplies a
maximum of 8 Watts of power. Connect the AC power to 20 to 26V AC In, power return, and chassis
ground, as below .
Note: 24V AC powered transmitters are protected from major catastrophe with an internal 2.0 Amp
slow-blow fuse. If this fuse is blown, replace the transmitter or return it to the factory for repair.
External Equipment
Power Supply (20 . . . 26V AC)Power Supply
(Return)
(Acceptable wire sizes: 28 to 12 AWG)
TB400
Switch
or Circuit
Breaker
Chassis Ground
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