Star Micronics TSP400 Series Programmer's Manual page 25

Drive circuit
The recommended drive circuit is shown.
F.G
TR1
M-GND
TR2
M-GND
TR3
NOTES:
1. Peripheral units #1 and #2 cannot be driven simultaneously.
When driving a device continuously, do not use drive duty above 20%.
2. Compulsion switch status is available as status data.
3. Resistance for coils L1 and L2 is not less than 24 ohms.
4. Absolute maximum ratings for diodes D1 and D2 (at Ta=25˚C):
Average rectified current Io = 1A
Maximum forward surge current (60Hz,1-cycle sine wave) I
5. Absolute maximum rating for transistors TR1 and TR2 (at Ta = 25˚C):
Collector current Ic = 2A
+24V
7824
+5V
R1
R2
[Drive output 24V, max. 1.0 A]
1
2
D1
3
4
D2
5
6
– 22 –
With shield
Peripheral
L1
unit 1
R3
4.7k
L2
1/4W
Peripheral
unit 2
Compulsion
switch
Frame
ground
=40A
FSM