Siemens MFI, Technical Manual, Page: 16 / 18

Addendum
9
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Restricted
A6V12068740
2020-09-07
9 Addendum
(A)Using OC outputs of MFI
MFI’s open collector outputs can be used as depicted below:
OC 1, OC 2, OC 3 points will be grounded, if they are activated from MFI to
trigger current flow through the load(s).
External power or one of MFI’s power output ports can be used for powering
load on OC points. This implies that the following options are available for
driving load on OC points.
● MFI 12V output
● MFI GL12V output
● MFI VOUT output
● External power
If MFI power output ports are used to power load on OCs, overall current usage
shall not exceed the limits (discussed in section 3.1) for each of the output port,
considering other loads that needs to be connected such as readers, door
latches and so on.
(B)EOL terminations
EOL resisters shall be enabled on MFI’s and AP’s if the cable length exceeds 20
meters.
To enable EOL on MFI’s ACC -AP connection port (Refer section 3.1
Description of Numbered Items in the Diagram - Item Number 12)
To enable EOL on MFI’s reader connection port (Refer section 3.1 Description
of Numbered Items in the Diagram - Item Number 4a)
To enable EOL on ACC- AP’s MFI communication port (Refer ACC-AP
Technical Manual)
MFI
L
o
a
d
1
L
o
a
d
2
L
o
a
d
3
V V V
Voltage input
OC 1
OC 2
OC 3