Star TSP552 Mode D'emploi page 107

Notes 1. A shield cable must be used.
2. It is not possible to drive two drives simultaneously.
3. The peripheral drive duty must satisfy the following.
ON time / (ON time + OFF time) ≤ 0.2
4. Power to the peripheral drive must be supplied from the printer
(connector pin 4).
5. The resistance of the peripheral drive solenoid must be 24 Ω or
higher.
If it is lower than 24 Ω, over-current may flow into the solenoid,
causing the solenoid to burn.
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