Specifications

8
A
UDIOACCESS
System Installation
Pre-wire
As in the PX-600 Installation Manual, we strongly suggest home-run wiring for all KPSs
and PX-603s in every system. Although a list of reasons for doing so appears in the PX-600
Installation Manual, several points are worth repeating here:
• Systems will be more easily serviced.
• Trouble-shooting time will be reduced.
• It is much easier to locate a faulty component.
• You and your clients will be happier if you can isolate and correct problems quickly.
During pre-wire, all speaker, KPS/KP3 keypad and other wiring is routed, and gang boxes or
rings are installed for the keypads. General pre-wire and trim-out instructions are covered in
the PX-600 Installation Manual, but there are some specific considerations for installations
that include the PX-603.
The four-conductor bus of each PX-603 should be home-run to a KPT for communication
with the PX-600.
KP3s require six-conductor, 24 AWG wire and must be home-run directly to the PX-603.
KPS keypads that will be used to control PX-603 rooms are not connected to the PX-603.
They should be home-run to a KPT. Distribute KPSs evenly among KPTs to equalize
electrical drain throughout the system, especially in multiple PX-600 systems.
Keypad Installation
This section covers the various aspects of installing, configuring and using the Audioaccess KPS
and KP3 keypads with the PX-603 Multi-Room Expander.
Keypad Termination Board (KPT)
The KPT (sold separately) is used to connect multiple, home-run KPS keypads and PX-603s.
Up to six separate connections may be made to the KPT in addition to a jumper to the
PX-600. The KPT may be mounted in any location between the PX-600, PX-603, and the
keypads. We recommend that it be easily accessible. The KPT is useful when troubleshooting
keypad and PX-603 operations, since individual lines may be tested by unplugging all but the
one in question. Miswires, incorrect DIP switch settings or malfunctioning keypads or
PX-603s can be quickly identified in this manner.
Daisy Chained Wiring
Daisy chaining refers to a method in which you connect a cable from one KPS keypad to the
next, with the final termination made directly to the PX-600 rear panel. This method is often
used when home-runs are not possible. In new construction, the risk of wire damage during
all stages of construction is high, and the daisy chaining method compounds the risk of losing
connection to many keypads with one accident. Thus, while daisy chaining may seem
efficient, extra care must be used when routing the wiring, especially in new construction.
Because KP3 keypad connections are hard-wired, KP3s must be home-run to the PX-603;
they cannot be daisy chained.