GBA
Global Bill Acceptors
GBA ST1 Operation Manual
Page 13 of 37
Astrosys International Ltd
September 2011
ST1 Operations Manual Rev 2.0
4.0 INTERFACE PROTOCOLS
The GBA ST1 can communicate with a host (machine) via one of seven base interface protocols.
These protocols are;
•
NAMA MDB
•
Pulse
•
Parallel
•
ccTalk
®
•
Bi-directional serial protocol (“RS232”)
•
SSP
•
JVI/VCCS
Variants to some of these protocols are also available; please contact your regional office for
further details.
The GBA ST1 unit is connected to the host using an appropriate interface cable assembly. With the
exception of MDB the GBA ST1 will be connected to the host machine using a cable assembly
terminated with a 20-way connector, as denoted in section 8.0 – Electrical Connections.
4.1 NAMA MDB
If the GBA ST1 is used in an MDB interface application, an additional MDB PSU board and interface
cable assembly is required to connect to a standard NAMA 6 pin connector.
The MDB PSU board is fitted within ST1 and a 6 Pin Connector is accessible at the rear of the
Bottom Sensor Assembly, once the vented cover is removed.
The board includes a 20 to 42 Volt voltage regulator and opto-isolation of the communication
lines, as required by the NAMA MDB specification.
Please contact Technical Support for details.
4.2 CCTALK
®
If the validator is used in a ccTalk® interface application, an alternative 20 pin harness is available
if the host controller uses a single data line for communications both to and from the validator.
Part Number: ASY-W-10265.
Please contact Technical Support for details.
For further details relating to the operation of specific interfaces please refer to the Interface
Description Manual.
4.3 USB
The GBA ST1 can be offered with an optional USB interface. The USB socket is fitted to the back of
the unit, next to the 12V power plug.
The USB interface can be used to connect directly to a USB PC host, where it then acts as a USB /
serial comms port, and can be used to connect to BSPC RS232, SSP and ccTalk protocols. The GBA
