TT-107IU Silicone Keyboard - Technical Documentation
15.05.2012 © E.L.B. Ex-Geraete Bachmann GmbH Page 3
General Information
1
In short
Advantages of the keyboard TT-107IU:
•
Suitable for hazardous areas zone 1, 2 (gas), 21 and 22 (dust)
•
Integrated mouse pad with special functions
•
USB device; one cable only for keyboard and mouse
•
Well palpable keys, easy to find even with gloves
•
Switch point easy to feel
•
Case without gaps and edges, easy to clean
•
Case, lead and plug (silicone) resistant against most chemical fluids
•
Dust and water proof, e.g. IP 68 (immersion)
•
Suitable intrinsically safe interface and supply available (W...-Q)
2
Delivery components
Delivery includes:
-
Keyboard TT-107IU (available in black only)
-
Manual
3
Handling hints
Installation
Keyboard and mouse pad install themselves automatically on your PC as
“HIDs” (human interface devices). There is no driver CD necessary. Further-
more the USB plug may be connected before or after starting the PC.
With every powering-up the keyboard first checks the maximum possible data
rate of the USB channel. If the data rate is less than 480 Mbit/s (USB 2.0,
“high speed“) a message appears on the screen like this: “This device might
work better with a high-speed USB connector”, and the keyboard switches
back to 12 Mbit/s (USB 1.1 “full speed“). Actually this does not slow down the
data rate, because “full speed” is sufficient by far. Frequency testing and
message are just parts of standard routines, which can also be found in slow
USB devices.
The reason for this message may be a long cable or an intrinsically safe
supply connected with the keyboard. In both cases capacitances between the
cable leads or of protective diodes disturb the transmission of high
frequencies. However, when the message “Device not recognized” appears,
even USB 1.1 “full speed” cannot be achieved or there is another failure.
