Parallel Interface
Parallel Port Features
The printer can have one of two parallel interfaces:
An IEEE 1284-A 25-pin, D-shell connector, with pin-outs that interface to a standard IBM PC parallel printer interface with a one-to-one cable. Or, an IEEE 1284-B, which is a standard Centronics 36-pin connector.
The following table lists interface signals and corresponding pins:
|
25-pin Connector
|
36-pin Connector
|
Signal
|
Description
|
Direction
|
|
Pin 1
|
Pin 1
|
STROBE
|
Clock data to printer
|
Host to Printer
|
|
Pins 2-9
|
Pins 2-9
|
D0 - D7
|
Data
|
Host to Printer
|
|
Pin 10
|
Pin 10
|
ACK\
|
Printer accepted data
|
Printer to Host
|
|
Pin 11
|
Pin 11
|
BUSY
|
Printer busy
|
Printer to Host
|
|
Pin 12
|
Pin 12
|
PE
|
Paper Out/Status
|
Printer to Host
|
|
Pin 13
|
Pin 13
|
SLCT
|
Printer selected
|
Printer to Host
|
|
Pin 14
|
Pin 14
|
AUTOFD
|
Autofeed paper
|
Host to Printer
|
|
Pin 15
|
Pin 32
|
FAULT\
|
Printer error
|
Printer to Host
|
|
Pin 16
|
Pin 31
|
INIT\
|
Initialize printer
|
Host to Printer
|
|
Pin 17
|
Pin 36
|
SLIN
|
Select printer
|
Host to Printer
|
|
|
Pin 17
|
FG
|
Frame ground
|
Printer to Host
|
|
-
|
Pin 18
|
+5V
|
Peripheral logic high
|
Printer to Host
|
|
Pins 18-25
|
Pins 16, 19-30
|
GND
|
Ground
|
|
Signal Levels
Voltage levels 0 V and +5 V (nominal)
Logic levels
Logic one
Driver +2.4 V to +5 V
Receiver +2.0 V to +5 V
Logic zero
Driver 0 V to +0.4 V
Receiver 0 V to +0.8 V
Current requirements
Logic one Source 0.25 ma at +2.4 V
Logic zero Sink 16 ma
Line termination
Data and control 3.3k ohm to +5 V
Strobe 1.2k ohm to +5 V
RS-232 Serial Interface
Serial Port Features
The serial port features are as follows:
Baud Rates 300, 600, 1200, 2400, 4800, 9600, 19.2K, 38.4K, and 57.6K
Bit Patterns 8-bit no parity; 8-bit odd; 8-bit even; 7-bit no parity; 7-bit odd; 7-bit even
Flow Control DTR and XON/XOFF
|
9-pin
|
25-pin
|
Signal
|
Description
|
|
Pin 1
|
Pin 8
|
|
Not Connected
|
|
Pin 2
|
Pin 3
|
RX
|
Receive Data
|
|
Pin 3
|
Pin 2
|
TX
|
Transmit Data
|
|
Pin 4
|
Pin 20
|
DTR
|
Data Terminal Ready
|
|
Pin 5
|
Pin 7
|
GND
|
Signal Ground
|
|
Pin 6
|
Pin 6
|
DSR
|
Data Set Ready
|
|
Pin 7
|
Pin 4
|
RTS
|
Request to Send
|
|
Pin 8
|
Pin 5
|
CTS
|
Clear to Send
|
|
Pin 9
|
Pin 11
|
|
Not Connected
|
Signal Voltage and Current levels
The serial interface meets EIA RS232 interface specifications:
Voltage Levels Max +-15 Volts
Min +- 3 Volts
Mark = Off = -3 to –15 Volts
Space = On = +3 to +15 Volts
Because both the host and printer are DTE's (Data Terminal Equipment), they use the same serial port pin-outs. If the cable that is used to connect the host to the printer is a pin-to-pin inter-connect, it will not work. Therefore, a null modem or turn-around cable must be used to interconnect the host and the printer.
USB Interface
The USB interface is a Version 1.1 interface that is Version 2.0 compliant. The standard USB interface card is implemented through a Standard Series "B" Receptacle as defined in the USB Specification. The printer is self-powered and does not draw power from the standard type B USB interface cable.
The Standard USB Type B connector has the following pin functions:
Pin Signal
1 Vbus (+5 V dc) (Not used in the iTherm® 280)
2 Minus data
3 Plus data
4 Ground
Note: The standard USB interface does not have enough power to run the printer.
Ethernet 10-Base-T adapter
An IP addressable 10-Base-T Ethernet adapter is available for the iTherm® 280 printer. It provides for web page configuration and supports bi-directional RAW and Telnet interfaces. All protocols are implemented to the extent necessary to support printing from Windows™ platforms; specific protocols supported include the following:
· Line Printer Daemon Protocol (LPR) – RFC1179
· Simple Network Management Protocol (SNMP) – RFC1157
· Printer MIB – RFC1759
· Port 9100 (Raw data)
· Service Location Protocol (SLP) – RFC2165
· The TFTP Protocol (Revision 2) – RFC1350
· Telnet COM Port Control Option – RFC2217
· Hypertext Transfer Protocol – HTTP/1.1 – RFC2616
Refer to the 100-05072 Wired Ethernet Programmer’s Guide for features and additional setup information.
Note: The Ethernet adapter supports only the Ithaca Cash Drawer interface.
Cash Drawer
Interface Description
The iTherm® 280 Printer supports a single cash drawer with status. The driver in the printer is capable of supplying 24 V DC at up to 1.5 amps for up to 250 milliseconds. The iTherm® 280 Printer defines cash drawer closed as switch open. If the drawer is disconnected, it will be viewed by the printer as closed. Since the printer does not act on the cash drawer status, the application can interpret cash drawer status any way it wants.
Driver connector type (standard) Single RJ12 connectors with 24V sink drivers
Driver voltage 24 volts (Refer to power supply specification).
Driver current 1 amp maximum with current limit
Pulse duration 250 msec. maximum
Drawer status Open/close drawer status provided to printer
The cash drawer can be configured for one of three configurations; Ithaca, Epson, or Star. The Main Controller PCB has three (3) six-pin headers, one each configuration. The cash drawer harness is identical, and is plugged into the appropriate header at time of factory build. The header position defines the configuration of the cash drawer. This design allows for changing the cash drawer in the field by a trained technician. Refer to the markups on the board when determining where the harness should be installed to work in the three different configurations.
|
|
Ithaca
|
|
Epson
|
|
Star
|
|
|
Pin Number
|
Signal Name
|
Direction
|
Signal Name
|
Direction
|
Signal Name
|
Direction
|
|
1
|
Frame ground
|
|
Drawer kick-out drive signal 2
|
Output Sink Drive
|
Frame ground
|
|
|
2
|
Drawer kick-out drive signal 1
|
Output Sink Drive
|
Drawer open/close signal
|
Input
|
Drawer kick-out drive signal 1
|
Output Sink Drive
|
|
3
|
Drawer open/close signal
|
Input
|
Signal ground
|
|
+24V DC
|
|
|
4
|
+24V DC
|
|
+24V DC
|
|
+24V DC
|
|
|
5
|
Drawer kick-out drive signal 2
|
Output Sink Drive
|
Drawer kick-out drive signal 1
|
Output Sink Drive
|
Drawer kick-out drive signal 2
|
Output
|
|
6
|
Signal Ground
|
|
Frame Ground
|
|
Drawer Open/Close signal
|
Input
|
Fax: 203.949.9048
