Chentronics iScan3 Series - Remote File Select

MNL-ISCAN3, REVB INSTALLATION & OPERATION MANUAL Page 21 of 25
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Remote File Select
The Remote File Select feature provides a means for automatically selecting one the configuration files resident within the
scanner. iScan3 has a two wire or four wire option to remotely select files. File select configurations are wire fault protected;
[A5]
meaning if any wire combination is broken, i.e. loose wire connection or a wire gets cut, the scanner will fault. Switching
must occur in less thatn 800ms. Per NFPA, file selects should not be used to “blind” scanner from seeing flame, to obtain a
start permissive.
FOUR WIRE CONFIGURATION: USES TWO RELAYS
File Select
SEL 3
SEL 2
SEL 1
SEL 0
A
N.O. CLOSED to C
OPEN
N.O. CLOSED to C
OPEN
B
OPEN
N.C. CLOSED to C
N.O. CLOSED to C
OPEN
C
OPEN
N.C. CLOSED to C
OPEN
N.C. CLOSED to C
D
N.O. CLOSED to C
OPEN
OPEN
N.C. CLOSED to C
TWO WIRE CONFIGURATION: USES ONE RELAY
File Select
SEL 1
SEL 0
B
N.O. CLOSED to C
OPEN
C
OPEN
N.C. CLOSED to C
Note: Connect iScan3 SEL (File Select) wires via dry relays contacts (supplied by others) per above. Connect the common (C)
side of the File Select relays to -24 VDC return. Remote File Select must be enabled otherwise SEL inputs are ignored. Refer to
Remote File Select (RFS) section of MNL-iSCAN for instructions on setting up and using the Remote File Select feature