ABB SensyMaster FMT230 Commissioning Instruction page 42

42 FMT230, FMT250 THERMAL MASS FLOWMETER | CI/FMT230/250-EN REV. B
... 7 Electrical connections
... Electrical data for inputs and outputs
Digital output 41 / 42, 51 / 52
Can be configured via Modbus.
A Passive digital output 41 / 42 as pulse or frequency output, Passive
digital output 51 / 52 as pulse output
B Passive digital output 51 / 52 as binary output
Figure 30: Passive digital outputs (I = internal, E = external)
Pulse / frequency output (passive)
Terminals
Output 'closed'
Output 'open'
f
max
Pulse width
41 / 42 (pulse / frequency output)
51 / 52 (pulse output)
0 V ≤ U ≤ 3 V
CEL
For f < 2.5 kHz: 2 mA < I < 30 mA
CEL
For f > 2.5 kHz: 10 mA < I < 30 mA
CEL
16 V ≤ U ≤ 30 V DC
CEH
0 mA ≤ I ≤ 0.2 mA
CEH
10.5 kHz
0.1 to 2000 ms
Binary output (passive)
Terminals
Output 'closed'
Output 'open'
Switching function
Note
• Digital output 51 / 52 cannot be configured as a frequency
output.
• Terminals 42 / 52 have the same potential. Digital outputs
41 / 42 and 51 / 52 are not electrically isolated from each
other.
• If you are using a mechanical counter, we recommend setting
a pulse width of ≥ 30 ms and a maximum frequency of
f ≤ 3 kHz.
max
41 / 42, 51 / 52
0 V ≤ U ≤ 3 V
CEL
2 mA ≤ I ≤ 30 mA
CEL
16 V ≤ U ≤ 30 V DC
CEH
0 mA ≤ I ≤ 0.2 mA
CEH
Configurable