Cabling; Lf-Connection Cords; Remote Control Network - Electro-Voice Precision P1200RL Owner's Manual

LF-CONNECTION CORDS

Choosing balanced cables (two conductors for the audio signal plus separate shielding mesh) with
XLR-type connectors is recommended for LF-signal connection. Although connecting unbalanced
cables to the power amplifier inputs is possible as well, using balanced cabling is always preferable. A
great number of today's audio appliances employ balanced outputs. With balanced cabling, the shield
connects all metal enclosure parts and thus efficiently eliminates the introduction of noise and hum.
XLR-type connector pin-assignment
XLR (male)

REMOTE CONTROL NETWORK

The network of the remote power amps is based on the CAN-bus standard, which for years is especially
popular in automotive, industrial and security applications. The CAN-bus is a balanced serial interface
for command and data transmission. Controlling the power amplifiers is performed from a PC with IRIS
– Intelligent Remote & Integrated Supervision – software installed. The UCC1 USB-CAN Converter
serves as interface between the PC and the CAN-bus. Connecting up to 100 power amplifiers per CAN-
Bus with a maximum total cable length of 1,000 meters is possible. An additional CAN-bus is needed
for controlling more than 100 power amps while the IRIS software allows administering a total of 250
power amps.
The network topology used by the CAN-bus is based on the so-called "bus or line topology", i.e. all
participants are connected via a single two-wire cable (Twisted-Pair cable, shielded or unshielded) with
the cabling running from one participant on the bus to the next, allowing unlimited communication among
all appliances. In general, it does not matter whether a participant on the bus is a power amplifier
circuitry, network cabling also carries a common ground conductor (CAN_GND) ensuring that all circuitry, network cabling also carries a common ground conductor (CAN_GND) ensuring that all
CAN-interfaces in the network are connected to a common ground potential. The UCC1 provides the
possibility for switching the CAN-ground to circuit-ground.
Each participant on the bus system has two RJ-45 connectors for the Remote CAN-bus. These sockets
are connected in parallel to serve as input and output (for connecting through) for the data transfer within
the remote-network. The CAN-bus has to be terminated at both ends using 120Ω terminator plugs, two
of which – CAN-TERM 120Ω – are supplied with the UCC1. Connect one of these to the RJ-45 socket
of the first and the other to the socket of the last appliance on the CAN-bus.
XLR (female)
or an UCC1 USB-CAN converter, so that
both – UCC1 and the PC as well – can be
inserted at any position. Incorporating several
UCC1 and PCs on a single CAN-bus is also
possible. A total of up to 100 appliances
can be operated on a single CAN-bus. Since
the CAN-interfaces of all appliances are
galvanically separated from the rest of the
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CABLING