ABB Advant AC500 - Mechanical Encoding

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V2 AC500 Hardware 1-29 System data AC500 / Issued: 05.2007
1 Terminal with wire connected
2 Insert screwdriver (2.5 x 0.4 to 3.5 x 0.5 mm) at an angle, screwdriver must be at least
15 mm free of insulation at the tip
3 While erecting the screwdriver, insert it until the stop (requires a little strength), terminal is
now open
4 Remove wire from the open terminal
5 Remove the screwdriver
6 Done
Mechanical encoding
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Pos.
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Figure: Possible positions for mechanical encoding (1 to 18)
Terminal Units (S500) and CPU Terminal Bases (AC500) have an mechanical coding which prevents
that modules are inserted to wrong places. Otherwise
• dangerous parasitic voltages could occur or
• modules could be destroyed.
The coding either makes it impossible to insert the module to the wrong place or blocks its electrical
function (outputs are not activated).