Commissioning Commubox FXA291
20 Endress+Hauser
11.2 Connection
• For computers: USB 1.1 and 2.0 compatibility, 4-pin USB connector, type A
• For transmitters: CDI connectors, short-circuit proof with reverse polarity protection
The USB and adapter cable are ready-wired on the box side upon delivery and secured
with a cable gland.
11.3 Supply voltage
• Voltage range: from the USB port on the PC, typically 5VDC
• Field devices powered up to 100 mW via VCC, reverse polarity protection
11.4 Intrinsically safe signal circuit
For connecting an intrinsically safe circuit with type of protection [Ex ia] IIC with:
• Connection voltage: < 7 VDC
• U
m
: 260V
With Commubox FXA291, the intrinsically safe connection and non-intrinsically safe
connection are protected. Therefore, it is possible to connect non-Ex devices to the
intrinsically safe side of a Commubox FXA291 without this affecting approval to connect
an Ex-device subsequently.
12 Commissioning
12.1 Connecting the Commubox
12.1.1 System requirements
• USB port (USB 1.1 or 2.0)
• DVD/CD-ROM drive
• Windows 8 / Windows 7 / Windows XP
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