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DESIGN
G-13.mft MDB/S1
Interfaces
At the bottom right-hand side on the rear of the coin validator there is a
10-pole connecting plug to the vending machine, and on the left-hand side
at the centre there is a 3-pole JST plug for connecting an external sorting
device. On the left-hand side, there is the interface to the PC programming
station and the Palm handheld. (See Fig. 1a and 1b)
Interface – vending machine
The coin validator is connected to the machine via the serial MDB interface 8
(see Fig. 1a and 1b) and a 10-pole cable via which it can receive information
from the vending machine or send information to the vending machine. The
machine operates as a master and the G-13.mft as a slave. The master can
communicate with several slaves (e.g. coin and bill validator). To ensure
unambiguous communication each device has its own MDB address. The
address of the G-13.mft as an MDB model is "01", and "15" as an S1 model.
The G-13.mft as an MDB model does not fulfil the MDB specification
on two counts, i.e. the specified voltage range and the electrical
isolation of the communication lines.
If a supply voltage of 42 V max. and electrical isolation are
desirable, an MDB converter G-55.0360 can be ordered from NRI
(ordering code 23627).
You can obtain further information about the MDB and S1 interface:
• in the "NAMA document MDB/ICP 2.0" (www.vending.org) and
• in the NRI S1 specification for the G-40 S1, which will be placed at
your disposal upon your request.
You will find a list of the commands implemented in the G-13.mft in
Chap. 9 "Technical data".
Please refer to the section "Pin assignment and connection
diagrams" also included in Chap. 9 "Technical data" for more details
on the assignment of individual plugs (pins).
16 National Rejectors, Inc. GmbH, Buxtehude