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Able Systems Limited

Contents 1 2 3 4 5 Appendices Introduction On-line Information Pin Connections Installation Operation and Programming EMC Disclaimer, PCB Layout & Schematic

Able Systems Limited
Contents 1 2 3 4 5 Appendices Introduction On-line Information Pin Connections Installation Operation and Programming EMC Disclaimer, PCB Layout & Schematic
1 Introduction
2 On-Line Information
Able Systems maintains a site on the World Wide Web. This includes application data updates, product announcements, and e-mail facilities for customer support. The URL of our web site is: Our e-mail address is: http://www.able-systems.com contact@able-systems.com
3 Pin Connections
The A104B has three external connectors or connection areas, for data and power, auxiliary power, and the printer mechanism. The locations of these connectors, and the overall PCB outline and fixing positions, are designed to be identical to those of the A160B. 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 (S / P Select ) Data Input D7 (Baud Select) Data Input D6 (Baud Select) Data Input D5 Data Input D4 Data Input D3 Data Input D2 Data Input D1 Data Input D0 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 1 2 3 Function Power for logic (+5V) Power for mechanism (+5V) Ground (0V) J3 Pin no 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Function Busy output (high when busy) Inverted Mode Select Input (low for inverted) Ground (0V) Ground (0V) Power for mechanism (+5V) Power for logic (+5V) Reset Input (low to reset) Serial Data / Parallel Data Strobe Input
3.3 Paper Take-up Motor Connector J5 (only fitted to customer order) J5 Pin no 1 2 Function Ground (0V) 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. 3.4 Mechanism Connector J2 The A104B is normally supplied without a connector fitted, or with a flat 0.1" pitch jumper cable. J2 Pin no 1 2 3 4 5 6 7 8 9 10 11 Function Reed switch input Reed switch return (0V) Motor return (0V) Motor drive output Solenoid common return (0V) Solenoid D output Solenoid C output Solenoid B output Solenoid A output Tacho bias Tacho input
4 Installation
5 Operation and Programming
5.1 Mechanism selection All the four-needle EPSON mini-printer mechanisms (M150, M160, M163, M164 and M170) are now supported by a single A104B device. The A104B exercises the mechanism on the first power-up, and its type is sensed by counting tacho pulses per head cycle. The result is stored in the EEPROM, and on
5.2 Parallel Data Mode D7 to D0 are the data connections for parallel mode 8 bit data. If using one of the backwards compatible 7 bit character sets (A160C family) D6 to D0 are the data connections. Positive true ASCII codes are accepted at TTL or 5V CMOS levels. The data inputs are not latched and must be static during the handshake sequence. The Data Strobe input times the incoming data transfer. When the printer is not busy (the busy signal is low) the data must be held static on the data pins and the strobe signal taken low until the busy signal goes high to acknowledge the data transfer. The data strobe must then be taken high ready to transmit the next byte. Figure 5.1 shows typical connections to a PC parallel port.
Printer J3 1 D7 2 Busy 3 D6 4 Invert 5 D5 6 GND 7 D4 8 GND D3 Mech D2 VCC D1 Reset D0 Strobe 9 10 11 12 13 14 15 16
PC Parallel Port 18 GND 10 / 11 Ack / Busy 8 D6 NC 7 D5 19 / 12 Paper end / GND 6 D4 5 NC 4 15 3 NC
D3 D2 Error D1 D0 Strobe
Fig. 5.1 Parallel Connection to a PC 5.3 Serial Data Mode The serial data input accepts a TTL or 5V CMOS positive true signal. The busy signal will be low when the printer is ready to accept data. The A104B is not suitable for direct connection to a PC RS232 COM: port. (Please refer to ASL for a converter board, or alternatively Able Systems produce an Ap25S which is the serial RS232 version of the Ap25 and is suitable for direct connection to a PC.) Figure 5.2 shows typical connections to a PC serial COM: port for the Ap25.
Printer J3 1 2 3 4 5 6 GND D4 7 GND 8 D7 Busy D6 Invert D5 D3 9 10 Mech 11 D2 VCC 12 D1 13 Reset 14 D0 15 Serial TTL Data 16
PC Serial Com. Port NC Baud Rate Select NC Baud Rate Select NC NC 7 GND NC NC NC NC NC NC NC 25 Way D-Type 5 Busy
TTL - RS232 Converter
RS232 - TTL Converter
2 RS232 Serial Data Transmit
Appendices
Following page: Next page: Final page: EMC Directive 89 / 336 / EC Disclaimer A104B PCB Component Layout (Drawing Number: L4984203-3) A104B PCB Schematic Diagram (Drawing Number: S3990301-4)
EMC Directive 89 / 336 / EC (Disclaimer)