GBA ST1 - 7.0 ELECTRICAL INTERFACE SPECIFICATION; 7.1 Power; 7.2 Signal Interface

GBA Global Bill Acceptors GBA ST1 Operation Manual
Page 23 of 37 Astrosys International Ltd
September 2011
ST1 Operations Manual Rev 2.0
7.0 ELECTRICAL INTERFACE SPECIFICATION
7.1 Power
7.1.1 Power Supply – 20-pin connector
Voltage: 12Volts DC +/- 10% Regulated
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7.1.2 Power Supply – Optional MDB 6-pin Connector and Power Regulator
Voltage: 20 to 50 Volts DC
7.1.3 Power Consumption
Quiescent: 200mA
Validating: 800mA
Stacking: 700mA
Stalled: 1400mA
7.2 Signal Interface
7.2.1 20-pin connector
Open Collector outputs;
Maximum Open Voltage 40V
Maximum Sink Current 50mA @ 12VDC
Maximum Output Low Voltage: 0.4VDC
Minimum Output High Voltage: 2.4VDC
Input low level voltage: 0…. 1V
Input high level voltage: 3…..12V (typically 3… 5V)
Input pull up to 5V: 21K Ω
7.2.2 Optional MDB 6-pin Connector
This connector provides opto-isolated data communication lines, in accordance with the NAMA
MDB specification.
Maximum output low voltage: 1V @ 20mA
Maximum input idle level current: 0.5mA
Minimum input active level current: 5mA
Pull-up resistor on TX: none
Limiting resistor on RX: internal, 560Ω
7.2.3 USB Connector
The ST1 is compliant as a USB 2.0 full speed host or device and is fitted with a mini-AB socket.
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For Power packs, 12vDC connection should be Centre Positive.