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8 70Vrms Speaker Circuit Interface Card and Audio Converter
Transformer Expansion
As previously indicated, the AV-V70 universal audio converter is capable of supporting two (2) 70Vrms Speaker
Circuit Interface Cards and Audio Converter Transformers. Adding an additional 70Vrms Speaker Circuit Interface
Card and Audio Converter Transformer requires acquiring and installing an AV-V70-KIT.
An AV-V70-KIT includes the following:
One (1) 70Vrms Speaker Circuit Interface Card
One (1) Audio Converter Transformer
One (1) Panel Status Interconnect Cable
One (1) Hardware Packet
(4 standoffs, 4 spare screws, 2 washers, 2 lock washers and 2 nuts)
One (1) Installation Instruction
a. Installing the Additional Audio Converter Transformer
To install the AV-V70-KIT Audio Converter Transformer (XFRM #2), place the new transformer over the studs
above the original AV-V70 Audio Converter Transformer (XFRM #1). Place the provided washer and lock washer
over each stud and secure with the provided nuts (see figure 11).
b. Installing the Additional 70Vrms Speaker Circuit Interface Card
Remove the four screws securing the original AV-V70 70Vrms Speaker Circuit Interface Card and replace with the
provided four standoffs. Secure the new 70Vrms Speaker Circuit Interface Card to the installed four standoffs, with
the four previously removed screws (see figure 11).
Wire the black wires attached to the newly installed Audio Converter Transformer (XFRM #2) to the Audio
Transformer 25V terminals located on the newly installed 70Vrms Speaker Circuit Interface Card. Wire the red wires
attached to the newly installed Audio Converter Transformer (XFRM #2) to the Audio Transformer 70V terminals
located on the newly installed 70Vrms Speaker Circuit Interface Card (see figure 11).
Connect the black end of the two pin cable assembly provided with the AV-V70-KIT to the two pins labeled Remote
LED Connections Trouble, located on the newly installed 70Vrms Speaker Circuit Interface Card. As this is not a
keyed connection, ensure the black wire of the two pin cable is installed on the K pin of the 70Vrms Speaker Circuit
Interface Card. Connect the other end (white) of the two pin cable to the Trbl #2 LED Drive connector located on the
Figure 10 – 70Vrms Speaker Circuit Interface Card Wiring to LED Indicator Card
