
IES PR-6 dimmer pack Operators’ Manual v. 1.1 25-04-2002 2
1 Introduction
1.1 Product range
This handbook describes the operation and
programming for the IES PR-6 6 x 2.5kW rack
mounting dimmer pack. The dimmers covered by
this handbook are:
9908 PR-6, 2 x 2.5kW, 24A three
phase input, 6 x CEE17 16A, 6 x
dual Schuko outputs or 6 x dual
French outputs
9913 PR-6, 2 x 2.5kW, star/delta
RCBO input, 6 x CEE17 16A, 6 x
dual Schuko outputs or 6 x dual
French outputs
1.2 Main features of the PR-6
The PR-6 is a fully digital triac dimmer pack with
MCB overcurrent protection per circuit, a three
phase 4-pole 30mA RCD or a star/delta input with
RCBO and a choice of socket outlets included in the
design. The programming facility is one of the most
sophisticated available, and the control panel
includes a backlit menu-driven LCD screen to set
and review operational parameters, performance
and status information. The PR-6 shares many of
the advanced features of the ‘itec’ range of IGBT
dimmers from IES, including DimSTAT, the bi-
directional network used for status and circuit fault
analysis, remote programming and software
updates.
2 Unpacking and installation
2.1 Unpacking & checking
The PR-6 dimmer pack is a self-contained dimming
system and only requires a suitable mains input
connector.
The PR-6 dimmer pack is packed to withstand
normal transportation, but before operating the unit,
check there is no sign of transit damage which could
affect the operation and safety of the dimmer.
2.2 Positioning
The PR-6 dimmer pack is an extremely versatile
dimmer, and can be incorporated in a 19” equipment
rack, or used as a portable dimmer. It is designed for
forced ventilation cooling and care must be taken to
ensure adequate ventilation especially when the PR-
6 is built into a cabinet. The PR-6 is supplied with
mountings suitable for 19” equipment enclosures,
and accommodates 3U of panel space.
2.3 Connections
Note: All electrical connections to the PR-6
dimmer pack must be made by a suitably-
qualified person.
2.3.1 Power input connections
Input power is supplied via a 3-phase, neutral and
earth 4mm2flexible cable or a 4-wire delta supply
cable. For ease of installation and removal, a
suitable plug and socket, such as a 32A three phase
CEE17, is recommended.
2.3.2 Power output connections
The PR-6 has a choice of one CEE17 16A, or twin
Schuko or twin French sockets per channel.
Connections to the loads are simply made by fitting
the appropriate plug to the load cable.
2.3.3 DMX data signal connections
The dimmers are controlled using DMX 512. This is
connected by a two-pair and shield high-speed data
cable with XLR 5-pin connectors (male = input;
female = output).
Pin connections are:
10V shield
2DMX +
3DMX -
4DimSTAT –(optional)
5DimSTAT + (optional)
The DMX network supports up to 32 PR-6 dimmer
packs (192 dimmers in total) connected to each
DMX line. For larger installations where more DMX
lines are required, the use of a DMX booster/isolator
is recommended. Any booster/isolator used has to
accommodate bi-directional data on pins 4 and 5 for
DimSTAT to operate. Suitable boosters are IES
code 9601 (5 channels) or 9815 (10 channels).
Termination is required for both DMX and DimSTAT
data on all networks. The last DMX output socket in
the line has to be terminated with two 120 1/4 Watt
resistors connected between pins 2 and 3 (DMX)
and between 4 and 5 (DimSTAT). A ‘dummy plug’
XLR male connector with the termination resistors
fitted is recommended for this purpose.
Note: If DimSTAT communications network is
not required, the DMX cable specification
may be reduced to a single pair.
2.4 Safety
Even though the PR-6 dimmer pack is equipped with
MCBs per channel and a RCD or RCBO input
protection device, all normal electrical safety
procedures must be applied. Do not use the dimmer
if the mains input cable has been damaged, or the
body of the case is not intact.