Installation manual

IVX 128 Hardware overview/installation
B.15
External paging device connection
A dry contact overhead-paging device can be connected to the system through the first port card's
66 block.
The overhead paging port is fixed (located on the main board) as extension 199 for programming
purposes and user access.
Audio connection
The audio pair is connected to the 66 block at terminal 33 and 34. The pair’s impedence is 600 ohms.
Dry contact control
The manner in which the dry contact pair is punched down on the 66 block sets the pair as nor-
mally open (sending a page to the port will close the contacts) or normally closed (sending a page
to the port will open the contacts).
Connect the dry contact pair of the device to IVX as follows:
• Terminals 35 and
36
to provide normally
open
operation
or
• Terminals 35 and
37
to provide normally
closed
operation.
The port can be used with zone paging units.
Note:
The port doesn’t support talk-back paging (which requires a CO port), nor does it support CO
ring through the port.
Amphenol cable connections
Connect a standard 66 Block to each port card using a male 50-pin amphenol cable to each port
card female connector located on the bottom-right side of the cabinet. The connector closest to
the wall is the first card. CO line numbering will be greatly simplified if DLC12 cards are installed as
the last cards.
Note:
Expansion Cabinets are required when adding additional port cards.