Star Micronics TSP143IIU - 10-5. Environmental Requirements

– 28 –
Notes: 1. Peripheral units 1 and 2 cannot be driven simultaneously. To drive them
continuously, set the duty cycle ratio to 20% or less (excluding an externally
connected buzzer).
2. e following external buzzer unit is available as an option.
External buzzer model: BU01-24-A
3. Never use the external buzzer command if you connect a device (such as a
cash drawer) other than an external buzzer. It could damage the connected
device and the printer circuit. Refer to the separate Programmer's Manual for
details on commands.
4. e status of the compulsion switch can be known from the status command.
Refer to the separate Programmer's Manual for details.
5. Minimum resistance for coils L1 and L2 is 24.
6. Absolute maximum ratings for diodes D1 and D2 (Ta = 25°C) are:
Average Rectied Current I
o
= 1A
7. Absolute maximum rating for transistors TR1 and TR2 (Ta = 25°C) are:
Collector current I
C
= 2.0 A
8. When the printer enters the print ready mode, Q4 in the drive circuit is o.
erefore, the voltage supplied to peripheral devices is the VCC voltage
(approximately 3.3 V).