Kurz
Instruments, Inc.
831-646-5911
2411 Garden Road
www.kurzinstruments.com
Monterey, CA 93940
360208-F 454FTB, 504FTB, 534FTB
12
454FTB/504FTB/534FTB I/O connections
Power
The MFT B-Series, 454FTB, 504FTB and 534FTB have a universal input power supply,
85 to 265 VAC, 50/60 Hz or 24 VDC (18 to 30 V).
Analog Output
This is an optional feature which can be wired two ways but you still need the 24 VDC
power (or AC power option) to operate the unit as a “4-wire” connection:
1.
The 4-20 mA interface can be optically isolated (also known as loop powered but
the meter still needs a 24 VDC or AC power connection). In this case your 4-20
mA input circuit is providing the excitation voltage for the meter’s AO interface.
2.
You can self power the 4-20 mA circuit from the flow meter where Kurz provides
the 24 VDC excitation voltage. The output is not isolated in this case. Here your
4-20 mA input will need a differential current receiver or other method to accept
the current signal which is ground referenced at the flow transmitter.
Digital Communications (also see Protocol section near the end)
The MFT B-Series supports USB with a PC COM emulator driver (9600 baud only) to do
remote terminal or keyboard communications. See disk for USB driver installation
instructions. The MFT B-Series also supports half duplex RS-485 for Modbus
communication. Modbus communication can be configured for baud rates of 9.6, 14.4,
19.2, 38.4 and 57.6 kbits/s. The HART 4-20 mA FSK protocol is available as an option
Analog
Outputs
DC
Power
USB
RS-485
DO,
DI, AI
Sensor
AC
power
