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16
INSTALLER
Multiple 857 Connections
To SaphIR K2 keypads
To EZB-1SC connecting block with
up to 4 SaphIR K2 keypads
Multiple 857
Connections
Multiple groups of up to four
K2 keypads can be linked
together by using successive
Russound 857 IR connecting
blocks as shown in the dia-
gram to the left. Each IR con-
necting block must have its
own 1201A power supply.
Each Russound 1201A power
supply supports a maximum of
four K2 keypads.
When using shielded 22/4
cable, use one twisted pair for
power and ground, and the
other twisted pair for status
and IR signal. Always drain the
shield by connecting it or the
drain wire to the ground termi-
nal on the IR connecting block
as shown in the top diagram
on the next page.
When using CAT-5 cable, drain
the orange/white and green/
white wires by connecting
them to the ground terminal on
the IR connecting block as
shown in the bottom diagram
on the next page.