Panasonic KX-P3124 - Manual (Page 103)

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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 used to initialize the printer. The signal is normally high and goes low to reset the
printer. It can be received anytime during printer operation.
ERROR
•This output signal is an “error” or “fault” condition. Normally high, this signal 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 \iS (Min)
T2 .... 1 ps (Min)
T3.... 0.5
\xs (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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