2 drive circuit, Drive circuit – Citizen Systems CBM-820 Benutzerhandbuch
Seite 47
– 32 –
7.2
Drive circuit
The recommended drive unit is shown below.
Notes
• Peripheral Units 1 and 2 cannot be driven simultaneously.
• For continuous driving, do not use drive duty greater than 20%.
• Compulsion switch status is available as status data.
• Minimum resistance for coils L1 and L2 is 24
Ω.
• Absolute maximum ratings for diodes D1 and D2 (Ta = 25
°C) are:
Average Rectified Current Io = 1A
Maximum forward surge current (60Hz, 1-cycle sine wave) I
FSM
= 40A
• Absolute maximum rating for transistors TR1 and TR2 (Ta = 25
°C) are:
Collector current Ic = 2A
Collector loss Pc = 1.2W
7824
F.G
TR1
M-GND
TR2
M-GND
TR3
+5V
+24V
R1
R2
6
5
4
3
2
1
L1
L2
R3
4.7k
Ω
1/4W
Frame
ground
Printer side
User side
D1
D2
Peripheral
unit 1
With shield
Peripheral
unit 2
Compulsion
switch
Drive output: 24V, 1.0A max.