Cisco SCH-VDS-BB, Reference Manual

Page: 32 / 40

32
Cisco Smart+Connected Video Door Station Reference Guide
OL-27367-01
Installing the Cisco Video Door Station
Contact and Relay Connections
You can connect devices to the contact ports or the relay ports (see Figure 19 ).
Caution
Cisco Systems does not support using earth ground for contacts as this could damage the Cisco Video
Door Station.
Figure 19 Contacts and Relays
Connect to a Port
The Cisco Video Door Station provides six (6) ports for use as two (2) contact sets and one (1) relay (see
Figure 19 ).
1
Relays
2 Contacts
Table 7 Contact and Relay
Port Type Description
Contact (2 sets) Terminal connector for one (1) dry contact closure, logic input connection, for
gate control, etc. Provides power for small devices (12 V), signal input (SIG),
return path (GND). The current, 100 mA, is shared across both sets of contacts.
Note Do not use contacts that are grounded. The Cisco Video Door Station
only supports non-grounded contacts.
Relay (1) Terminal connector for one (1) normally closed or normally opened switchable
connection for doorbell control (see
Figure 20 ) or gate control. The set contains
a connection for Normally Opened (NO), Normally Closed (NC), and Common
(COM).