MZC-88 Installation Instructions Page 75
Audio Page Commands
Refer to the Doorbell/Page Programming section.
Audio Clear Commands
Use the Audio Clear Command when using a Source Key to monitor a video only source such as surveillance camera. If a
zone switches sources, and the last source selected was an A/V source, if a video only source is selected, the previous source’s
audio will continue to play. Audio Clear will “clear” the previous audio routing command so only the new video signal will be
active.
VIDEO ROUTING COMMANDS
These commands have the same flexibility for Video routing as the previous Audio Routing Commands have for Audio. They
allow assigning any Source video signal to any Zone Source key. They are included in the default “MZC-88DEF.etp” project and
would normally not need to be changed. Programming Video Routing Commands is done with the same procedure as Audio
Routing. The Video Routing Commands can be found under the MZC-88 CMDs tab, Video Routing Commands.
CONTACT CLOSURE COMMANDS
These commands operate the two Contact Closure Relays. See Item 2
Figure 4 for location and other details. Refer also to
Figure 67. Definition of the 4 commands are as follows:
Contact Closure #1/2 – Open. When one of these commands is sent, the associated relay contacts will open and stay open
until an appropriate Close command is sent.
NOTE: This command would be used for power management (OFF) of an external amplifier as explained in the Section:
External Amplifiers.
Contact Closure #1/2 – Close. When one of these commands is sent, the associated relay contacts will close and stay closed
until an Open command is sent. These types of commands (Open/Close) are often referred to as “Paired” commands and are
useful to ensure an absolute open or closed condition when the related controlled action is not readily observable.
NOTE: This command would be used for power management (ON) of an external amplifier as explained in the Section:
External Amplifiers.
Contact Closure #1/2 – Toggle. When one of these commands is sent, the associated relay will change state and remain
so until another Toggle command is sent. Useful for simple ON/OFF control of a lamp, for example, and uses only one key
button.
Contact Closure #1/2 – Momentary. These commands will cause a contact closure only while the command is present.
Useful for triggering of devices that will execute an action with a momentary closure, such as lifts, screen drops, etc.
These commands can be programmed under any desired key or placed in macros in the normal way.
Figure 67
Contact Closure Commands
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