Alliance Laundry Systems NK100, NK101, NK120 23

Troubleshooting

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 overwrites the default network address on the NWB.

NOTE: Use different node address for each FEC.

NETWORK CONTROL BOARD (NWB)

DIAGNOSTIC LED

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.

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.

Card Reader Harness

Passes power from the NWB to the card reader.

AND

Passes data between the NWB and the card reader.

Control Harness Passes power from the FEC to the NWB.

AND

Passes data between the FEC and the NWB.

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.

COMPUTER

NETWORK INTERFACE

BOARD (NIB)

Operator interface to the

Network Harness

Links all machines

Network Interface Harness

together through the

network. Reads data

NIB's and place

received from the network

Passes data to and from the

individual machine data

and passes data to

network to the machine.

machines on the network.

on one communication

bus.

Requires each machine to

have a separate node

address.

Last (NIB) on the

network requires an 120

(NIB)

Ohm terminating

resistor for proper

communication.

Figure 10

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