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Structure and function
5
Setup
29
Building Technologies
008250_i_en_--
Fire Safety
2013-08-15
Item
Symbol/
Element
Description
Function
9
Socket
External power supply via the supplied FDUL221-B
power unit (DC 24 V, 625 mA)
10
On/Off switch
I = On
O = Off
11
Socket
'Yellow/green'
Connection for the ground wire or shielding
12
USB connection
type B
Connection to PC (in the case of older FDUL221 line
testers also RS232 interface or MC link)
5.2.1
Display
The FDUL221 line tester has a 4-line display with 20 characters per line.
Features
Adjustable backlight
Adjustable contrast
Automatic adjustment of the vertical and horizontal scroll function with the
buttons
Display of plain text and symbols