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Multi-drop bus to RS-232 or USB PC interface ( MDB-RS232 )

Working with bill acceptor,coin validator, card reader,cashless defvice, for vending machine,kiosk machine,kiosk information machine

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The vending machine standard NAMA Multi-Drop Bus (MDB) may now be interfaced to a PC using the MDB-RS232. The MDB-RS232 allows Coin Acceptance, Change Dispensing, smart card reader, magnetic swipe, credit card reader,bill acceptor and bill validation all controlled by the PC.Conforms to all NAMA MDB specification and is compatible with any MDB compliant vending device. Hardware interface comes with cables,user's guide and user's protocal.

Up to eight (8) MDB compliant devices may be attached to a single MDB-RS232. The programming interface is user-friendly.

( For Pulse type Coin validator and bill acceptor to PC, please check: PULSE-PC adapter )

This Interface Unit (IU) is designed to convert the MDB Bill Acceptor (BA) and MDB Coin Changer (CC) protocol to RS-232 serial protocol. The IU functions as a slave to a master control system. The master may be any control system that supports RS-232 serial communication, for example a PC.

DESCRIPTION:
This Interface Unit (IU) is designed to convert the MDB Bill Acceptor (BA) and MDB Coin Changer (CC) protocol to RS-232 serial protocol. The IU functions as a slave to a master control system. The master may be any control system that supports RS-232 serial communication, for example a PC.

OPERATION:
The master and slave communication is based on master requests and slave replies. The master sends a status request (or command) to the IU and IU answers by sending its current status. The IU’s typical response to the Master’s request (polling) consists of a header and data bytes. If there is no BA or CC activity, the status is one byte, the header only. When the IU receives data from the BA or CC, it sends a header followed by data bytes in the response to master’s status request. The master must always poll (query) the IU. If the IU does not receive a query from the master in the predefined time slot or IU does not recognize master messages 10 times in row, it will inhibit the BA and CC acceptance. At power up, acceptance of the BA and CC is inhibited.

SPECIFICATION:
Communication data format according to the MDB protocal:

Baud rate

Start bit

Data bits

Parity

Stop bit

9600 BPS

1

8

NO

1

MDB protocal Timing Specification:


Inter-byte (max)

Response (max)

Master polling times every

Time IU waits for the Master’s poll before inhibiting acceptance of the BA and CC (max)

1 ms

50 ms

150 – 300 ms

3 second

MDB-RS232 Hardware Specification.


Power

Cable

Dimensions

Weight

Min 20 VDC
Nominal 24 to 34 VDC (or 24 to 30VAC)
Max 36 VDC
Consumes an idle current  < 0.04A
0.6A when working to accept bills

Standard computer serial cable

Standard MDB cable

approx. 80 x 33 x 35 mm

approx. 135 g

Nomral Package List:

MDB-RS232 Adapter Board (1pcs)

MDB Cable From MDB-RS232 to Bill acceptor and Coin validator (1pcs)

RS232 Cable From MDB-RS232 to PC (1pcs)

Optional Parts:

MDB Power Supply

Power Supply For MDB RS232 adapter board ( 24VDC 3A)

References

MDB Protocal

The MDB test program is implemented according to the MDB specifications are designed according to:
NAMA MDB protocol specification V4.1
This protocol can be downloaded from the NAMA organization

Special MDB-RS232 SDK sets: (PC development software code including )

Working with the Nayax Cashless Payment ( Nayax vend VPOS )

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What is MDB-RS232 and RS232-MDB ?

Before order,you should know exactly what is the difference and then you will know what type is the exact products yoou need to order:

MDB-RS232 is used to connect the MDB bill acceptor,coin validator,cashless payment device to computer. then you will design the Software that will run in the PC and work as the master main vending controller. For example,you develop the kiosk information machine. then you need to connect the MDB bill acceptor,coin validator to computer,but you don't know how to connect the MDB interface payment device to computer, because computer only has the RS232 port, no MDB port.then you need to order the MDB-RS232 adapter (MDB2PC Adapter ).

RS232-MDB is used to connect the pc to existing vending machine.then you will need to design the Software that will run in the PC and work as the slave cashless payment device.and then you PC will work as a cashless payment device to vending machine. For example,you want to use the PC to give payment credit to existing vending machine, or if you want to make the internet connection to the vending machine and give credit to vending machine remotely, then you need to order the RS232-MDB adapter (PC2MDB adapter ).

Order the samples directly from http://www.wafer-shopping.com :