Interfacing, Sg...signal ground, Fg...frame ground – Panasonic KX-P3123 User Manual
Page 96: Prime, Error
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Interfacing
SG...SIGNAL GROUND
• The twisted pair return wires (pins 19-30) are connected to signal ground.
FG...FRAME GROUND
• Frame ground is the same as chassis ground.
+5V
• This is for evaluation only. It should not be used to supply power for external equipment.
PRIME
• This input signal is normally high and goes low to reset the printer. It can be received anytime during
printer operation.
ERROR
• This output signal is normally high, and goes low when an error occurs. An error condition can be
caused by:
1. A “Paper Out" condition
2. The printer is OFF LINE
3. An overload condition exists
Timing Chart (When normal printing code is received)
T1...0.5 ps (Min)
T2...1ps (Min)
T3...0.5 ps (Min)
T4...5 ps (Max)
T5...1 ms or less when buffer is not full
1 s or less when buffer is full
Timing diagram
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