Dynasonics TFX Ultra Transit Time Flow Meters - Manual (Page 15)

Line Voltage AC Power Connections
Connect 95…264V AC, AC neutral and chassis ground to the terminals referenced in Figure 6 . Do not operate without an earth
(chassis) ground connection.
MPORTANT I
Permanently connected equipment and multi-phase equipment shall employ a switch or circuit breaker as a means of disconnect.
The switch or circuit breaker shall conform to the following:
1. A switch or circuit breaker shall be included in the building installation.
2. The switch shall be in close proximity to the equipment and within easy reach of the operator.
3. The switch shall be marked as the disconnecting device for the equipment.
Wiring of this equipment in ordinary locations shall be in accordance with ANSI/NFPA 70, National Electrical Code (NEC), Canadian
Electrical Code (CEC) or IEC 60364 as required by local codes. Wiring of this equipment in hazardous locations requires special
considerations such a those described in National Electrical Code (NEC) Article 500, Canadian Electrical Code (CEC), CSA C22.1
or IEC 60079-14.
D
ownstr
eam
Upstr
eam
+ + - -
Modbus
TFX Rx
TFX Tx
Signal Gnd.
Control 1
Control 2
Frequency Out
4-20 mA Out
Reset Total
RS485 Gnd
RS485 A(-)
RS485 B(+)
95 - 264 VAC
AC Neutral
W
R
C
U
S
1500mA250V
D VE
372
R C US
E167432
$ TUV PRODUCT SERVICE RoHS
AC IN : 100-240VAC,50/60Hz
DC OUT : +15V / 0.3A
PWC - 1 5 E
0.15A
R2807
w w w . a s t r o d y n e . c o m
- Vo
+ Vo
A C L
A C N s t r o d y n e
1 2 3 4 O
N
95 - 264 VAC
AC Neutral
Switch
or
Circuit
Breaker
24V AC Transformer
D
ownstr
eam
Upstr
eam
+ + - -
Modbus
TFX Rx
TFX Tx
Signal Gnd.
Control 1
Control 2
Frequency Out
4-20 mA Out
Reset Total
RS485 Gnd
RS485 A(-)
RS485 B(+)
W
R
C
U
S
1500mA250V
D VE
372
1 2 3 4 O
N
s t r o d y n e
-IN
+
OU
T+
OUT−
IN: 18-36VAC
OUT: 15VDC
ASD06-24S15
Test
P1
Chassis Gnd.
24 VAC
AC Neutral
Switch
or
Circuit
Breaker
Figure 6: Line voltage AC power connections Figure 7: Low voltage AC power connections
Low Voltage AC Power Connections
Connect 20…28V AC, AC neutral and chassis ground to the terminals referenced in Figure 7 .
DANGER
DO NOT OPERATE WITHOUT AN EARTH (CHASSIS) GROUND CONNECTION.
The 24V AC power supply option for this meter is intended for a typical HVAC and Building Control Systems (BCS) powered
by a 24V AC, nominal, power source. This power source is provided by AC line power to 24V AC drop down transformer and is
installed by the installation electricians.
OTE:
N
In electrically noisy applications, grounding the meter to the pipe where the transducers are mounted may provide
additional noise suppression. This approach is only effective with conductive metal pipes. The earth (chassis) ground
derived from the line voltage power supply should be removed at the meter and a new earth ground connected
between the meter and the pipe being measured.
OTE:
N
Wire gauges up to 14 AWG can be accommodated in the flow meter terminal blocks.
OTE:
N
AC powered versions are protected by a field replaceable fuse. The fuse is a time delay fuse rated at 0.5A/250V. This
fuse is equivalent to Wickmann P.N. 3720500041 or 37405000410.
TRANSMITTER INSTALLATION
Page 15 March 2014