Chapter 2 External I/O Specification External I/O Specification This section describes the external I/O for the printer. Connector The external I/O connectors are as follows. D-sub25 connector (female connector) Screws: Metric screws 13 1 2 A pulse signal is a square wave with a fixed short-term width. A low active pulse is a signal that changes sharply from High to Low, maintains a low state for a short period of time, and then sharply changes back to High. A High active pulse is a signal that changes sharply from Low to High, maintains a High state for a short period of time, and then sharply changes back to Low.
If a pulse signal meets the specification for pulse width, the time for the pulse width does not matter. Pulse width of input signal As shown in below, input pulse signals that can be received must have a pulse width of 30 msec or more. Maintain the low state stable for a pulse width of 30 msec. Min. 30 msec 10 25 14 Q Be sure to use the screws to affix the connection cable and ensure the cable does not fall out. NOTE Signal Definitions Pulse signal Q NOTE Be sure to use the screws to affix the connection cable and ensure the cable does not fall out. CAUTION Pulse widths of less than 30 msec can also be received.