PTD55 SERIES OPERATION MANUAL
4.3.3 - Serial RS-232 interface pins assignment
The assignments of the terminals of the RS-232 connector and the functions of its signals are
described in the following figure and table:
Fig.4.5.
Serial RS-232 interface pins.
Pin number
Signal name
Function
5
SGND
Signal ground
2
RXD
Data reception line
3
TXD
Data transmission line
7
RTS
Indicates whether the printer is busy
other
-
Not connected
4.4 - USB INTERFACE
The PTD55 USB interface has the following general features:
•
USB specification
USB 2.0 (480Mbits/s full speed)
•
Transfer type
Bulk
•
Maximum receive/transmit endpoint size
64 bytes
•
Current consumption from USB bus
2mA max.
User has to use a standard “B” series USB connector.
4.5 - PAPER NEAR-END INPUT
CONNECTION
The PTD55 has an optional input which can be used to warn the maintenance operator that the
printer is running out of paper although there is still paper to print few tickets. When the remaining paper
in the box reaches a level that can be considered "near-end", the system can alert the operator to
replace by another box of paper. This can be done by querying the status of the printer (
DLE EOT n
=4
command).
Fig.4.6.
Paper near-end input connector.
12 of 57
1
6
5
9
PAPER
NEAR-END
CONNECTOR