Outputs; Construction - Siemens SITRANS F Operating Instructions Manual

Technical data

10.4 Construction

10.3

Outputs

Table 10-4 Current output
Description
Signal range
Resolution
Load
Time constant (adjustable)
Fault current
Measurement range (mA)
Lower fault current (mA)
Upper fault current (mA)
Customized fail-safe mode
Galvanic isolation
Cable
Voltage range
10.4 Construction
Table 10-5
Description
Measurement of process medium
Table 10-6
Description
Measuring principle
System architecture
66
Channel 2
4 to 20 mA
0.4 μA
● Ex i: <470 Ω (HART ≥ 230 Ω)
● Non-Ex: <770 Ω (HART ≥ 230 Ω)
0.0 to 100 s
4 - 20 NAMUR
3.8 - 20.5
3.5
22.6
● Last valid value
– Lower fault current
– Upper fault current
● Fail-safe value
● Current value
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
Standard industrial signal cable with up to 3 twisted pairs with overall screen can be con‐
nected between the transmitter and the control system. Individual pair or overall screen is
optional depending on user requirements.
14 to 30 V DC (passive)
Designated use
System design
4 - 20 US
4.0 - 20.8
3.75
22.6
Specification
● Fluid Group 1 (suitable for dangerous fluids)
● Aggregate state: Paste/light slurry, liquid and gas
Specification
Ultrasonic
Wall mount housing with all functions integrated in a single pc
board
Operating Instructions, 09/2017, A5E41425845-AB
FST020 IP65 NEMA 4X