User manual

16 Installation DSI-2008
Bosch Security Systems, Inc.
User Manual
F.01U.193.295
Rev. 05
4-Wire Call Receive
The DSI 2008 receives call signals from the 2-wire system, then converts this to relay contact closure for use as a 4-wire call
receive indication. The DSI 2008 also provides +5 VDC which can be connected to the relay contacts to generate a DC output
signal instead of a contact closure. Connections for a simple contact are shown in Figure 6 on page 16.
FIGURE 6. Call signal connections for a 4-wire intercom system other than ADAM, ADAM-M, ADAM CS Zeus and Zeus
III.