Star TSP700II series Hardware Manual page 63

Reference
2SD 1866 Circuit Configuration
Note:
1. Pin 1 must be shield drain wire connected to peripheral device frame ground.
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)
Minimum resistance for coils L1 and L2 is 24 Ω.
4.
5. Absolute maximum ratings for diodes D1 and D2 (Ta = 25 °C) are:
Average Rectified Current Io = 1 A
6. Absolute maximum rating for transistors TR1 and TR2 (Ta = 25 °C) are:
Collector current Ic = 2 A
Drive Output: 24 V, Max. 1.0 A
TR1, TR2: Transistor 2SD 1866 or equivalent
R1=10 kΩ
R2=33 kΩ
0.2
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