P O R T A L T I +
Portal Installation Manual
29
Document #: PTL1001
Figure 23. Four-Wire Intercom Configuration
3 Wire Intercom Configuration:
This mode requires two conductors for audio and one
additional conductor for the call function. This mode uses a common ground for both audio
and the call function (SP-). Jumper pins 3&4 of J35 and connect H1, SP+ and SP- as shown
below.
Figure 24. Three-Wire Intercom Configuration
2 Wire Intercom Configuration:
This type of intercom system has both the Call Function
and audio sharing the two conductors. Jumper pins 3&4 and 1&2 of J35 and connect the two
conductors to SP+ & SP- as shown below.
Figure 25. Two-Wire Intercom Configuration
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