10 - 2010
5.7 ELECTRONIC INTERFACE: I/O INTERFACE BOARD
The Combo - T connects to the master of the system through this interface board, using a
standard of 2 x 5 - way ccTalk connection. In addition to the ccTalk connection, it has a
microcontroller for the control of the ccTalk devices working in parallel, such the refund motor
and the escrow and the reading of analogue / digital inputs to receive information on the status
of the devices.
The interface board, using the set of enabled ccTalk commands takes control, using voltage
levels, of the refund motor and the escrow and reports the status of the analogue / digital inputs
connected to the interface, among them the refund button, micro-switches in the escrow and the
position of the refund motor. There are unassigned inputs that could be used for the reading the
status of any other sensor or activator.
5.7.1 Functions
• Serial ccTalk interface between the Combo – T and the master application.
• Provides the power supply to all the components.
• Activation / Deactivation of the refund motor using ccTalk commands.
• Activation / Deactivation of the escrow using ccTalk commands.
• Reading the status of the two aforementioned devices and the refund button.
• It has unused analogical / digital inputs for use with other devices.
5.7.2 Electrical characteristics
•
Voltage of power supply
Table 34: V of power supply of the I/O board
•
Current draw
Table 35: Current draw
V power supply Nominal (DC) V min.
V max.
12 – 24V ± 10%
10.8 V
26.4V
Current draw
I max. start up
1.5 A ± 20%
I normal
<100 mA ± 5%
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