Dynasonics TFX Ultra Transit Time Flow Meters - Manual (Page 16)

DC Power Connections
The flow meter may be operated from a 10…28V DC source, as long
as the source is capable of supplying a minimum of 5 Watts of power.
Connect the DC power to 10…28V DC In, power gnd., and chassis
gnd., as in Figure 1.6.
OTE:
N DC powered versions are protected by an automatically
resetting fuse. This fuse does not require replacement.
Figure 8: DC Power connections
10 - 28 VDC
Power Gnd.
D
ownstr
eam
Upstr
eam
+ + - -
Modbus
TFX Rx
TFX Tx
1 2 3 4 O
N
Signal Gnd.
Control 1
Control 2
Frequency Out
4-20 mA Out
Reset Total
RS485 Gnd
RS485 A(-)
RS485 B(+)
10…28 VDC
Power
Ground
Chassis
Ground
10 - 28 VDC
Power Gnd.
Switch
or
Circuit
Breaker
TRANSMITTER INSTALLATION
Page 16 March 2014