Technical Data
474-Add-on Modules
56
10.1.4 USB 2.0 (transparent)
The extender module with transparent USB 2.0 interface supports almost all types of USB 2.0 devices. USB 2.0 data
transfer is supported with USB high speed (max. 480 Mbit/s) or USB-embedded (up to 36/50/100 Mbit/s), depending
on the add-on module.
Each USB embedded port provides a maximum current of 500 mA (high power). When using a USB high speed
interface with 4 USB ports, respectively 2 connectors provide a maximum of 500 mA (high power) and 2 connectors a
maximum of 100 mA.
10.1.5 GPIO
This interface can be set up both as an input and as an output, see page 42.
With the GPIO add-on module set as input interface, an external switching solution (dry contact) with up to eight push
buttons can be connected. After pressing a push button, the corresponding function will be performed.
With the GPIO add-on module set as output interface, up to eight LEDs can be connected to indicate the active
console (mouse position) by a LED.
The electrical specification for each channel (each LED) is 5 V and provides a maximum of 137 mA (1.1 A in total for
the whole GPIO add-on module). All 8 LEDs share the +5 V pin. The -5 V connectors of the LEDs are connected to
the respective ground pin of the GPIO add-on module.
10.1.6 RS232 Serial
Extender modules with serial interface option support a
full-duplex transmission
with a real hardware handshake up
to a baud rate of 115,200 Bd.
The CON Unit is cabled as DTE (Data Terminal Equipment, like CPU output) and can be connected directly to DCE
devices (Data Communication Equipment).
•
A touch screen can be connected directly to the CON Unit.
•
To connect to a serial printer (or any other DTE instead of DCE device), you need a null modem cable (crossed
cable) between CON Unit and the device.
Operation of several Devices:
The serial interface transmits 6 signals (3 for each direction).
Normally, 4 of the 6 signals are handshake signals (in
addition to RxD and TxD).
The following configurations can be realized using special adapter splitting cables:
•
Three single 2-wire transmissions
•
Two transmissions with a handshake signal
•
A serial mouse and a single 2-wire transmission.
In this case, choose X-ON/X-OFF software handshake for traffic control at printer and PC.
