Siemens SITRANS FC330, Руководство по эксплуатации, Страница: 199 / 280

Table 11-12 Current output (Channels 2 to 4)
Description Channels 2 to 4
Signal range 0/4 to 20 mA
Resolution 0.4 μA
Load
● Ex i: <470 Ω
● Non-Ex: <770 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 4-20 NAMUR
4.0 - 20.5
2.0
22.0 4-20 US
4.0 - 24.0
2.0
25.0 0-20 NAMUR
0.0 - 20.5
0.0
22.0 0-20 US
0.0 - 24.0
0.0
25.0
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)
Table 11-13 Digital output
Description Channels 2 to 4
Pulse 41.6 µs to 5 s pulse duration
Resolution 1 μs
Frequency 0 to 12.5 kHz, 50 % duty cycle, 120 % overscale provision
Resolution 0.2 Hz
Load < 750 Ω
Time constant (adjustable) 0 to 100 s
Active 0 to 24 V DC, 87 mA, short-circuit-protected
Passive 3 to 30 V DC, 100 mA, short-circuit-protected
Functions
● Pulse
● Frequency
● Alarm class / NAMUR status
● Individual alarms
Technical data
11.5 Outputs
SITRANS FC330
Operating Instructions, 01/2019, A5E44030648-AB
199