Floating Contacts - Siemens optiPoint 500 Service Manual

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5.2.2

Floating Contacts

In addition, the acoustic adapter also provides two floating contacts. This allows the control of
a busy lamp and a secondary bell.
1. First contact (PIN 2 and 3)
This signals the active telephone states:
Handset offhook/trunk key activated
●
Speaker on/headset active
●
An external lamp can be used to indicate these states. When the lamp lights up, one of the
above-mentioned states is active. However you cannot provide a separate lamp for each
of this states.
The lamp receives power from an external source rather than from the telephone itself.
However, to prevent this lamp from causing irreversible damage to the optiset telephone
or optiset contact adapter, the power supply must range from 24 volts to a maximum of 60
volts, and the lamp itself should not exceed 5 watts. (You can, of course, connect a relay
instead of the lamp, taking care not to exceed the connection values mentioned above).
2. Second contact (PIN 4 and 5)
This provides the ring input status.
This contact can provide an external signaling mechanism when the telephone rings. This
is important when connecting a secondary bell or similar device. Once again, observe the
electrical connection values for this connector as well (24 V - 60 V, 5 W; do not connect an
inductive load without surge protection). However, you can also connect a relay instead of
the lamp, with this relay then controlling the 220 V secondary bell.
The "busy display" and "door opener" functions cannot take place simultaneously.
>
The "door opener" function is currently only applicable for HiPath 4000 (later also for
HiPath 3000 V4.0).
Contact Load
Both contacts can carry the following load:
5 W with 24 V a.c. or 60 V d.c.
P31003-E8400-A100-3-7620
Service Manual
Option Adapters and Ports
optiPoint 500 acoustic adapter
5-7