30 Hardware
Connecting Relay Outputs on a PEU 205
The dry contact relays can be used to attach devices such as electronic door locks, sirens or buzzers.
These devices are controlled by dialing a DTMF code from any station. Follow these general
guidelines when connecting devices to the dry contact relays.
• Each relay output is normally open and completely isolated from the VS1 phone system and
from ground.
• The maximum open circuit voltage for either contact is 24 volts AC or DC. The maximum
current switched by either contact is 0.5 amps.
Installing the Dry Contact Unit Model 100
To connect the TVS to the DCU, complete the following steps.
1. Plug one end of the 15-pin cable in the Cable A jack on the TVS.
2.
3. Plug the other end of the 15-pin cable in the Cable A jack on the PEU.
Connecting the DCU
to the TVS
Cable A (15-Pin)
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