Service manual

09/09 Rev. 5.02-02 SERVICE MANUAL Service Electronics

AP 4.4 – AP 5.4 – AP 7.t

Input/Output Signals

Internal supply The I/O board provides a galvanically decoupled 5 V source. External elec-

tronics, powered from this source, must not consume more than 0.5W (5 V /

100 mA).

¯ Maximum admissible output current: 100 mA

External supply The I/O board outputs may be powered by an external source from 5V to

24 V (pin 7). External electronics, powered from this source, must not consu-

me more than 200 mA per output channel.

¯ Maximum admissible output current: 200 mA

Fuses The fuses used on the I/O board are polymeric positive temperature coef-

ficient resistors. If they trip, they don´t blow and after cooling down, they work

again. They don´t need to be replaced.

Input signals

• START PRINT

• FEED

• PAUSE (optional: APSF)

• REPRINT

P For details see topic section Info-printouts & Parameters.

The input signals are powered by an internal 5 V source.

¯ Maximum admissible input voltages: 0 to 24V

• Active (low) input signal: V

= 0 to 1 V at I

≈ 10 to 20 mA

• Inactive (high) input signal: V

= 40 to 24 V at I

≈ 0 to 1 mA

• Max. frequency for APSF signal: 10 kHz

[1] I/O board: Input circuitry and possible connections to external electronics.

DC/DC

GND

5V..24V