Download Port Pin Outs

Transact Epic 880 - Port Pin Outs
Communications Interface
RS232 Serial Communications Interface
The RS232 Serial interface connector is a 14 position Molex Minifit Jr®., part number 39-30-1140, which mates with Molex part
number 39-01-2140 or equivalent.
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
Note: Power may be applied through this connector or the 4 pin power connector. See the DC Power Requirements section for 24 volt
power requirements.
Note: GND is the 24V return.
Note: FGND and GND are connected in the printer.
USB Interface
The USB interface supports USB Version 2.0 High speed or full speed. The standard USB interface 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[1]) (This is used to select between Interfaces)
2 Minus data
3 Plus data
4 Ground
Note: The standard USB interface does not have enough power to run the printer. It is not possible to power the printer with the USB
cable alone.
USB Configuration
To allow the application to use a virtual serial port or a USB printer port to interact with the printer, the EPIC 880 TM supports both
ports, and can be configured to support a Virtual COM port or a USB Printer device. The USB section of the configuration allows
USB Mode, USB Enumeration, and whether the printer will perform a normal Windows plug and play operation to be configured.
The default is printer port, use description, with Windows PnP on.
You should configure these options based on how you want the printer to perform in your system. Typically only the Virtual COM or
USB printer driver is required: to load the Transact Virtual COM port driver, disable the USB printer port. Typically you can use the
description as the enumeration ID, representing how the printer is uniquely identified to the host. If you select a description, all Epic
880’s will be the same, and you can interchange printers without affecting the port location, subject to the limitation that no more than
one Epic 880 can be connected to the same host. If that is a requirement, select ID by serial number or allow the ID number to be
assigned by windows based on the connection.
You can also disable the Windows PnP sequence. This will prevent the Windows system from receiving the printer driver selection
sequence. This will allow you to manually assign a driver to the USB printer connection and not have Windows keep asking for a
printer driver.
The adapter will support a high speed USB interface if the host also supports high speed. If the host does not support high speed the
printer will revert to full speed. It is possible to disable high speed operation by setting a configuration option. The printer does not
support the USB low speed protocol.
The most reliable USB interface is as a USB printing device. The Virtual COM driver is an added layer of code that allows legacy
software to believe it is interacting with a serial port. Note that a limitation of serial communications port virtualization is that each
version of windows is slightly different, and not all RS232 features are supported: only features such as receive, transmit and
ready/busy are supported, while other features such as on hook, off hook, ring, and break are not supported.
Power connector
Note: Power may be applied through the 14 pin connector. See the Communications Interface section for more information.
Note: The 24V RTN and FRAME pins are connected inside the printer.
Frame Ground Requirements
An adequate frame ground is required for this product to meet the required ESD immunity standards. It is expected that a typical
installation mounts this printer to a metal chassis that is the system “frame” or “safety” ground. This ground must provide adequate
conductivity to provide ESD immunity. In cases where the chassis is not connected to the system “frame” or “safety” ground, it is
necessary to ensure the printers metal chassis is connected via a separate ground strap with suitably low impedance. It is up to the
system integrator to provide adequate frame grounding.
Test Standards
CE MARK (1998)
FCC CLASS B
EN 60950-1
IEC 60950 (1991) Second Edition with Amendments 1,2,3,4
ROHH/WEEE
Acoustic Noise:
58 dbA average (sound pressure level) while printing a rolling ASCII format. Microphone positions are at 10 different positions
spaced around the printer as defined in ISO 779.
[1] The Vbus signal is used to disable the serial port. If the USB is connected the RS232 serial port is not active.