11.4
Inputs
Table 11-10 Digital input
Description
Channels 3 to 4
Load
15 to 30 VDC, R
in
7 kOhm
Functionality
● Start/stop/hold/continue dosing
● Reset totalizer 1, 2 or 3
● Reset all totalizers
● Freeze output
11.5
Outputs
Table 11-11 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 reliable 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
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)
Technical data
11.5 Outputs
SITRANS FC330
198
Operating Instructions, 01/2019, A5E44030648-AB