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
1)
2, 3 or 4 wire
1)
User supplied cables must be suitable for 5°C above surrounding ambient temperature.
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
Cable
1)
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.
Voltage range Max. 24 V DC (active)
14 to 30 V DC (passive)
1)
User supplied cables must be suitable for 5°C above surrounding ambient temperature.
Table 10-7 Current output (Channels 2 to 4)
Description Channels 2 to 4
Signal range 0/4 to 20 mA
Resolution 0.4 μA
Technical data
10.4 Outputs
SITRANS FST030 (Modbus)
Operating Instructions, 08/2018, A5E37367739-AD 125
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