Kurz
Instruments, Inc.
831-646-5911
2411 Garden Road
www.kurzinstruments.com
Monterey, CA 93940
360208-F 454FTB, 504FTB, 534FTB
11
Wiring, Sensor, Power and Signals
The thermal flow meter uses several watts of power to measure flow, so it requires more
than a simple 4-20 mA loop powered connection for operation. In general our products
are known as a “4-wire” device, power (2) and signal (2 or 4). The exact wiring diagram
for your meter can be looked up on the provided CD manual using the model number of
the meter. The two AC and DC power examples (pages 8&9) for the single 4-20 mA
output on the B-Series assume the PLC is connected to a loop powered device.
Potentially Hazardous Area Use and EMI Compliance
Please consult the full manual on the provided CD for safety and EMI related issues.
Sensor
For “Remote Electronics” you need to run five wire cable for each sensor between the
sensor J-box and Flow Computer. The wire gauge/length and conduit/shielding
requirements are found in the manual and on the field wiring diagrams. The transmitter
attached versions have no sensor wiring requirements since the sensor wiring for these
models are installed at the factory.
I/O wiring
The image below is for the 155Jr. This is used on remote display versions of the product.
155Jr I/O board photo (155A/B,155C-2/E-2 are not shown).
Analog
Outputs
RS-232
AC
Power
Sensor
Input
Cal/Operate
Switches
