GBA Global Bill Acceptors
GBA GV1 Operation Manual
Astrosys International Ltd
October 2018
GBA GV1 Operation Manual v2.00 Page 20 of 33
7.0 ELECTRICAL INTERFACE SPECIFICATION
7.1 Power
7.1.1 Power Supply - absolute limits
Voltage:
10.8-42VDC @ 4A
Current:
3.5A
7.1.2 Recommended Power Supply
Voltage:
12VDC ± 5%, Regulated
Current, Peak:
4A
Note: if at any time during operation, the voltage falls below 10.8V, note acceptance and
operation speed may be significantly impaired. Low voltage at power-up will also inhibit the GV1
unit from completing its self-checking sequence.
7.2 Signal Interface
7.2.1 General Purpose
Open Collector outputs;
Maximum Open Voltage:
40V
Maximum Sink Current:
50mA
Maximum Output Low Voltage:
0.4VDC
Input low level voltage:
0…. 1V
Input high level voltage:
3…..12V (typically 3… 5V)
Pull-up resistors on inputs:
internal, 22k
Ω
7.2.2 Serial Gaming / Loop Interface
Nominal interface voltage:
12V ± 10%
Maximum output low voltage:
1V @ 20mA
Maximum input idle level current:
0.5mA
Pull-up resistor on TX:
internal, 4.7k
Ω
Limiting resistor on RX:
internal, 2.2k
Ω
Limiting resistor on "Master Reset":
internal, 2.2k
Ω
7.2.3 MDB
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, 560
Ω
7.2.4 USB
Compliant as a USB 2.0 full-speed device
7.2.5 RS-232
Compliant
