Outputs; Construction - Siemens SITRANS F Operating Instructions Manual

Technical specifications

11.4 Construction

11.3

Outputs

Table 11-4 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
11.4 Construction
Table 11-5
Description
Measurement of process medium
Table 11-6
Description
Measuring principle
System architecture
78
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 connected
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, 05/2022, A5E41425845-AC
SITRANS FST020 IP65 (NEMA 4X)