
A20736 B0
121
Input / Output Connections
3.4
Printing start output
• Role:
The industrial interface terminals "-BUSY-1" and "COM BUSY1" for head 1 and "-BUSY-2" and
"COM BUSY2" for head 2 provide a synchronization signal that a message is being printed. This
enables the message to be viewed stroboscopically during continuous printing or signals that
message printing has finished.
This message synchronization output uses the outputs of a high-speed photocoupler with open-
collector phototransistor.
• Operating characteristics:
- Supply voltage between "-BUSY" and "COM BUSY":
−
0.5 V to 15 V
- Maximum output current I
S
on "-BUSY" terminal: 25 mA
- Maximum operating frequency: 10 kHz
- Maximum output power: 100 mW
The photocoupler is switched on for the entire time that a message is being printed.
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