Clear-Com i-Series Panels - Manual (Page 57)

You can, however, activate a talk path from any key assigned to a 2-way radio by pressing
and holding the key in momentary mode while you talk. The PTT: Activate 2-Way Radio
Keys function only affects latched keys.
7.4.2 Relay Outputs Connector
The DB-15F connector labeled J5B connects your i-Series panel to three single-pole
double-throw (SPDT) relays with contact ratings of 30 VDC (volts direct current) at 1 A
(ampere).
A relay is a switch that you control remotely. You program the relay in the Eclipse
Configuration System to close a contact whenever an intercom panel’s key is pressed.
When the contact is closed it completes an electronic circuit’s signal path so that a remote
device, such as a light, is powered.
You can program a relay to mute a speaker, to turn on an applause light, to turn on a door
lock, or for a variety of other functions. For example, to get the attention of a panel
operator working in a high-noise environment such as a control booth, you can program a
relay to switch on a light at his panel each time he receives an incoming call, thus insuring
that he will not miss the incoming call.
The i-Series panel has three relays: the auxiliary relay, the mute relay, and the studio
announce (SA) relay.
Mute Relay
The mute relay is controlled by the Eclipse Configuration System. It is typically used to
decrease or shut off an externally mounted loudspeaker. When you activate this feature,
pressing any talk key on the panel will decrease or shut off the volume at an externally
mounted loudspeaker. This function helps to ensure that noise from the external
loudspeaker does not disrupt the communication at the intercom panel.
Both normally open and normally closed contacts are provided. They are rated at 30 VDC
(volts direct current) at 1 A (ampere). The mute relay is not designed for switching mains
AC line voltage. To switch an external device running on mains AC line voltage, use an
external relay (or other switching mechanism) activated by the relay.
Auxiliary Relay
The auxiliary relay is controlled by the Eclipse Configuration System. When you attach the
programmable relay to any source or destination’s label in the intercom system through
the Eclipse Configuration System, whenever that label’s key is pressed on any panel in the
system, the relay activates as well.
Typically, a relay is used to activate an external device such as an applause light in a
studio, a cue light, or a security door lock. For example, you can program a relay so that
whenever anyone in the intercom system presses a key to talk to a specific panel, the
relay in that panel will activate and turn on a visual indicator (such as a light) to get the
panel operator’s attention.
Note: You can activate a relay that is independent of any talk-or-listen function by creating a
control label in the Eclipse Configuration System. When you activate the control label, only
the relay activates. No audio signal activates in conjunction with the relay.
Studio Announce (SA) Relay
The Studio Announce (SA) relay is controlled by the Eclipse Configuration System. The
SA relay momentarily turns off all “talk” paths leaving the panel and sends the panel’s
57 I-Series Panels User Guide