Siemens Hicom 150 E Office - Page 369

Figure 10-11 ET/A adapter interfaces
Caution
For the a/b interface, the a-wire must always be negative and the b-wire must always be
positive.
Table 10-1 ET/A contact assignment
Pin no. Terminal X3 Terminal X4 Terminal X5
1 AC (a-wire) - Speaker (LS1)
2 AC (b-wire) + Speaker (LS2)
3 Door opener contact (TUE) Bell contact (KLI) Microphone port (MIC+)
4 Door opener contact (TUE) Bell contact (KLI) Microphone port (MIC-)
Hicom 150 E Office Rel.1.0 Service Manual - 10 Special equipment
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