BSS Audio sw3088 Install Guide User Manual
Page 5
Soundweb 3088 Installation Guide
5
Mains inlet
IEC power connector, for connection to mains supply (100-270V AC, 50/60Hz).
Mains fuse holder
Requires a 20mm T1AL type fuse. Do not replace with anything other than the
recommended fuse.
Aux. RS232
An alternative connection for a control PC, modem or AMX/Crestron type panel. This port
works at up to 115200bps. Note that AMX panels only currently connect at 38400bps.
Pinouts
1 -DCD
6-DSR
2-RX
7-RTS
3-TX
8-CTS
4-DTR
9-N/C
5-GROUND
Control Inputs
Used to connect switches or potentiometers, e.g. 9012 selector wallplate (Part no.
Z-SW9012). Looking at the control port connector (on the back of the unit), there are two
common (ground) connections C to the left of the eight CONTROL INPUTS and, two
software assignable reference voltage outputs R to the right.
The control ports now have two modes of operation. In Soundweb Designers Control
Ports window these are labelled 2-wire and 3-wire.
2-wire mode
In this mode the eight CONTROL INPUTS are internally pulled up to +5V DC via a
4.7kOhm resistor. Therefore, no external voltage source is needed to create contact
closure to ground for switches such as mute buttons or, resistance to ground (for other
multi-state or continuous controls such as Parameter Presets or faders).
See the Soundweb Designer help for a table of resistor values for use with Parameter
Presets or source selectors.
Two common ground connections are provided using the two C connectors to the left
of the CONTROL INPUTS.
A 47kOhm-log potentiometer (Part no. DM10018) connected between a control input and
common will allow parameters to be controlled linearly.
3-wire mode
This mode allows the use of linear pots or faders for continuous controls. A pot would be
wired as a potential divider with the top of the track connected to the reference output
R, the wiper to a control input and the bottom of the track to a common C. For good