iDP3550/3551 User ’s Manual
9.3.2Electrical Characteristics
(1)Input signal level
All the input signals are at the TTL level. "HIGH" level : 2.0 V at minimum
"LOW" level : 0.8 V at maximum
(2)Output signal level
All the output signals are at the TTL level. "HIGH" level : 2.4 V at minimum
"LOW" level : 0.4 V at maximum
(3)Input and output conditions
All the input signals are pulled up with a 3.3 k Ω resistor.
[Printer Side] | [Host Side] |
Twisted 
Pair Wire
All the output signals are pulled up with a 3.3kΩ resistor.
[Printer Side] | [Host Side] |
Twisted
Pair Wire
30 | CITIZEN |
