Pulse Output - ABB FSM4000 Manual

64 FSM4000 ELECTROMAGNETIC FLOWMETER | DS/FSM4000-EN REV. L
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... Transmitter

Pulse output

Active pulse output
Pulse output, passive, optocoupler
I internal
Figure 41: Pulse output, active and passive, optoelectronic coupler
Current output active with / without HART protocol (4 ... 20 mA)
Terminals 51, 52
Current output can be selected via software
Operating mode Active / passive, selectable via jumper (see
'Commissioning' chapter in operating
instruction)
f 5 kHz
max
f 0.00016 Hz
min
Adjustment range Pulse / unit, pulse width (observe dynamic
limits)
Function Active
• 150 Ω ≤ load < 10 kΩ:
pulse width ≤ 50 ms,
max. pulse frequency ≤ 3 Hz,
• 500 Ω ≤ load < 10 kΩ
pulse width ≤ 0.1 ms,
max. pulse frequency: 5 kHz
Passive
• 'closed':
0 V ≤ U
• 'open':
16 V ≤ U
E external
≤ 2 V, 2 mA ≤ I ≤ 220 mA
CEL CEL
≤ 30 V, 0 mA ≤ I ≤ 2 mA
CEH CEH
PROFIBUS PA® / FOUNDATION Fieldbus®
I internal
1 PROFIBUS PA
Figure 42: Digital communication PROFIBUS PA / FOUNDATION Fieldbus
The resistance R and condenser C form the bus termination.
They must be installed when the device is connected to the
end of the entire bus cable.
R = 100 Ω; C = 1 µF
Bus termination for S4 transmitter
1 Terminal board for field mount
housing
Figure 43: Bus termination
To terminate the bus if the instrument is at the end of the
bus cable, the termination components in the S4 transmitter
can be used. To do so, close both hook switches in the
connection area of the transmitter.
Note
If the transmitter module is removed, bus termination is also
canceled.
E external
2 FOUNDATION Fieldbus
2 Hook switch for closing the bus
termination