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RPS 4 Remote Program Selector
In some applications, it may be desirable to switch
the MPE programs from a remote location, without
the use of a computer or MIDI controller. A simple
switch to change programs can also make operation
a lot easier for the non-technical person who may be
responsible for operating the sound system. The RPS
4 comes to the rescue.
Simply, the RPS 4 converts contact closures to
MIDI program changes. Depending on your requirements, the RPS 4 can generate up to 16 program
changes (1-16). These MIDI program change commands can simultaneously change your EQ curve(s)
on your MPE and/or any other MIDI controlled
device in your system. The sound equipment can
then be locked up in a rack somewhere else, possibly
minimizing cable runs and curious fingers. Presets
can be made for different program material, occupancy changes, different mics or placement, music
or speech. The switch can be located away from the
equipment rack. With the Rane FVL 22 Remote
Volume Level controller and the RPS 4, continuous
volume and EQ presets can be controlled by a
couple of knobs on a wall plate or in a lectern!
The wiring diagram for a simple two program
selector is shown below. This will toggle between
programs 1 and 2.
The Rane RWS 4 is a four position wall mount
switch designed to fit a 75 ohm coax wall plate. It
will supply four program changes to the MPEs using
any 3 conductor cable. Here's an actual size drawing
along with the wiring diagram.
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Rane MPE Users Guide
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Here is a wiring diagram to use with momentary
contact pushbuttons with optional LED indicators.
This idea can be used for 2, 3 or 4 program changes.
Using a binary encoded switch, 16 MIDI program
changes can be activated. A four pole, sixteen throw
switch can also be used. A switch with fewer positions (such as an eight throw switch) may be used by
omitting the extra connections.
Use of the RPS 4 is pretty obvious and shouldn’t
present any problems. Here is a short check list:
1. Connect a MIDI cable (standard 5-pin DIN)
between the MIDI OUT jack on the RPS 4 and
the MIDI IN jack on the MPE. When controlling
more than one MIDI unit at a time, connect the
RPS 4 MIDI OUT jack to the MIDI IN jack on
the first MPE, then connect the MIDI THRU
jack from the first MPE to the MIDI IN jack on
the second MPE, and so on. (Do not use the MPE
MIDI OUT jacks. MPE MIDI OUTs won't carry
the program change.)
2. If controlling an MPE, disconnect the power
supply cable from the red POWER jack on the
MPE and reconnect it to the POWER jack on the
RPS 4. Next, using the cable supplied, connect
the POWER OUT jack on the RPS 4 to the
MPE’s red POWER jack. All other applications
require using the optional Rane RS 1 remote
power supply (NOT SUPPLIED). Connect the RS
1 to either red POWER jack.
Rane MPE Users Guide
3. Use the MIDI CHANNEL SELECTOR to set
the desired channel. All units being controlled
must use the same MIDI channel. Refer to the
diagrams on the top of the RPS 4 for the correct
switch settings.
4. The final step is wiring up the switches. Refer to
the diagrams above for several choices. The RPS
4 works with all types of switches.
Note there is an internal jumper option labelled
BINARY or PUSHBUTTON. All RPS 4s are
shipped with this jumper installed in the PUSH-
BUTTON mode. As the name implies, this is the
correct position when using momentary pushbuttons
to change programs. Changing the jumper to the
BINARY position allows using the minimum
number of interconnecting wires. Sometimes this
represents a significant cost savings and convenience.
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