Technical data
10.4 Outputs
SITRANS F Ultrasonic flowmeters FST030 (Modbus)
Operating Instructions, 08/2017, A5E37367739-AC
117
Description
Channels 3 and 4
Cable
•
Standard industrial signal cable with up to 3 twisted pairs with
overall screen can be connected between the transmitter and the
control system. Individual pair or overall screen is optional depend-
ing on user requirements.
Voltage range
Max. 24 V DC (active)
14 to 30 V DC (passive)
Table 10- 5 Channels 5 and 6 input (RTD)
Description
Channels 5 and 6
Temperature range
-50 to 250°C (-58 to 482°F)
Resolution
<0.1 mK
Accuracy
+/- 0.25 K (calibrated 4 wire)
Input protection
25 VDC overvoltage
Cabling
2, 3 or 4 wire
10.4
Outputs
Table 10- 6 Current output (Channel 1)
Description
Channel 1
Signal range
4 to 20 mA
Resolution
0.4 μA
Load
•
Ex i: <470 Ω (HART ≥ 230 Ω)
•
Non-
Ex: <770 Ω (HART ≥ 230 Ω)
Time constant (adjustable)
0.0 to 100 s
Fault current
Measurement range (mA)
Lower fault current (mA)
Upper fault current (mA)
4 - 20 NAMUR
3.8 - 20.5
3.5
22.6
4 - 20 US
4.0 - 20.8
3.75
22.6
Customized fail-safe mode
•
Last valid value
•
Lower fault current
•
Upper fault current
•
Fail-safe value
•
Current value
Galvanic isolation
All inputs and outputs are galvanically isolated PELV circuits with 60 V DC isolation from
each other and ground.
Maximum test voltage: 500 V AC