ABB SensyMaster FMT430 - Page 61

SensyMaster FMT430, FMT450 THERMAL MASS FLOWMETER | OI/FMT430/450-EN REV. B 61
Digital input V1 / V2, V3 / V4 (plug-in module)
Up to two additional digital inputs can be implemented via the
‘Passive digital input (yellow)’ plug-in card.
Can be configured as an input for external counter reset,
external output deactivation etc. via on-site software.
Figure 51: Plug-in card as digital input (I = internal, E = external)
The plug-in module can be used in slot OC1 and OC2.
Digital input
Terminals
V1
/ V2, V3 / V4
Input ‘On’
16 V ≤ U
KL
≤ 30 V
Input ‘Off’
0
V ≤ U
KL
≤ 3 V
Internal resistance R
i
6.5 kΩ
Function
Can be configured using software.
Menu: Input/Output
on page 113
24 V DC loop power supply (plug-in module)
Use of the ‘loop power supply (blue)’ plug-in card allows a
passive output on the transmitter to be used as an active
output. See also Connection examples on page 62.
Figure 52: (I = Internal, E = External)
The plug-in module can only be used in slot OC1.
Loop power supply 24 V DC
Terminals
V1
/ V2
Function
For active connection of passive outputs
Output Voltage
24
V DC at 0 mA,
17 V DC at 25 mA
Load rating I
max
25
mA, permanently short circuit-proof
Note
If the device is used in potentially explosive atmospheres, the
plug-in card for the power supply may only be used to supply a
passive output. It is not allowed, to connect it to multiple
passive outputs!