Alliance Laundry Systems NK101 - Manual (Page 23)

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Troubleshooting
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Figure 10
FRONT END CONTROL (FEC)
Power requirements for operation:
24 VAC ± 4 VAC Between pins 1 & 2 at header H1.
Function:
Supplies power to the NWB and Card Reader.
24 - 38 VDC Between pins 3 & 12 at header H6.
5 VDC Between pins 2 & 12 at header H6.
Stores a programmable node address, which over-
writes the default network address on the NWB.
NOTE: Use different node address for each FEC.
NETWORK CONTROL BOARD (NWB)
Power requirements for operation:
24 VAC ± 4 VAC Between pins 6 & 7 at
header H1.
5 VAC ± .5 VAC Between pins 1 & 2 at
header H1
Function:
Receives data from the network and passes
it on to the FEC.
Receives data from the card reader and
passes it on to the FEC.
Receives data from the FEC and passes it
on to the card reader
Provides operational diagnostics through
the LED.
See section 1.0 for LED diagnostic details.
Has a default node address of 250.
CARD READER
Power requirements for operation:
24 - 38 VDC Between pins 3 & 12.
Function:
Reads data from the smart card and
sends it to the NWB.
Receives data from the NWB and
writes data on to the smart card.
COMPUTER
Operator interface to the
network. Reads data
received from the network
and passes data to
machines on the network.
Requires each machine to
have a separate node
address.
Network Harness
Passes data to and from the
network to the machine.
Network Interface Harness
Passes data to and from the
network to the machine.
NETWORK INTERFACE
BOARD (NIB)
Last (NIB) on the
network requires an 120
Ohm terminating
resistor for proper
communication.
H1
H2
H3
Control Harness
Passes power from the
FEC to the NWB.
AND
Passes data between the
FEC and the NWB.
Links all machines
together through the
NIB's and place
individual machine data
on one communication
bus.
Card Reader Harness
Passes power from the NWB
to the card reader.
AND
Passes data between the NWB
and the card reader.
(NIB) (NIB) (NIB) (NIB)
DIAGNOSTIC LED