ABLE Ap25 User Manual - page 3
3 PIN CONNECTIONS
The Ap25 has three external connectors or connection areas, for data and power, auxiliary power, and
the printer mechanism. There are also some onboard jumpers. Please refer to the layout diagram for
connector locations and pin orientation.
3.1 Data/Power Connector J3
Function
J3 Pin no
Function
Data Input D7
1
2
Busy output (high when busy)
(or Serial/Parallel mode select)
Data Input D6
3
4
Inverted Mode Select Input
(or Baud Rate Select in serial mode)
(low for inverted/reversed/data mode)
Data Input D5
5
6
Ground (0V)
(or Baud Rate Select in serial mode)
Data Input D4
7
8
Ground (0V)
Data Input D3
9
10
Power for mechanism (+5V)
Data Input D2
11
12
Power for logic (+5V)
Data Input D1
13
14
Reset Input
(low to reset)
Data Input D0
15
16
Serial Data / Parallel Data Strobe Input
3.2 Auxiliary Power Connector J4
These connections are in parallel with those on J3, and are provided for cases in which the user
prefers to separate the data and power connectors, as we would recommend.
J4 Pin no
Function
1
Power for logic (+5V)
2
Power for mechanism (+5V)
3
Ground (0V)
3.3 Paper Take-up Motor Connector J5 (only fitted to customer order)
J5 Pin no
Function
1
Ground (0V)
2
Paper Take-up Motor +ve
The output from Pin 2 is in parallel with the mechanism motor drive, with a protective series resistance
of about 16 Ohms. Please consult the factory before making any connection.
4 INSTALLATION
4.1 Power Supply
A clean DC power supply of 5V
±
5% 3A is required to power the Ap25. The rise time of the supply
must be short enough to give a valid reset signal to the controller chip. It is recommended that the
power supply for the controller circuits is separate from the supply to the mechanism motor and
solenoid circuits, to minimise interference.
In the event that the power supply is not adequate to power the Ap25, on board Circuitry will hold the
printer in reset and avoid any damage which may occur to the printer mechanism.
Ap25 Users’ Guide Page 2 of 8