Manual Logos
EELA AUDIO Parmentierweg 3
8
Rev. 6
(July 2001)
5657 EH Eindhoven, the Netherlands
Main v1.43
On all modules, inputs are always combined with outputs on the one sub-D25 female
multipin connector on the board. Also signalling, fader start/stop (GPIO) is present on this
connector.
In general: GPI are inputs low active and GPO are isolated optocoupler outputs for collector
and emitter (with I
f max
= 30 mA, max. 70 Volts).
External meter output
This ¼ inch jack connector provides an output to connect an external modulation meter (e.g.
RTW). This connector always carries the main output signal at a nominal signal level of
+6dB.
Loudspeaker outputs
Monitor output is loudspeaker line-level, asymmetrical stereo, on a ¼ inch jack. Active
speakers can be connected directly. The volume control for the loudspeakers is on the Logos
control panel.
Main output
These are two symmetrical analogue outputs for left and right on XLR male connectors, to be
used as feed for e.g. a transmitter. The Main signal can also be present on the sub-D25
multipin connectors of the input boards, depending on the LogosTool configuration (see
Chapter 3).
Sub-D9 GPI connector
A 9-pole sub-D9 connector is present with a number of signal input and outputs. These
inputs and outputs can be used for e.g. an ON AIR bulb or Cough button. The function of the
inputs and outputs can be programmed with the LogosTool software.
RS232 connector
The other 9-pole sub-D connector is a RS232 serial port, to connect the rack unit to the PC.
In normal operation the Audio Editor is controlled by means of this port. The same PC can
also be used to run the LogosTool software.
The connection is a straight 1 to 1 connection, with TX on pin 2, RX on pin 3 and GND to pin
5. For this purpose, a fully wired cable can also be used.
Remark: to avoid damage to the electronics due to Electronic Static Discharge (ESD),
both the mains of the PC and the Logos have to be plugged into an earthed outlet,
before connecting the serial communication cable.
Console connector
This connector is used for connecting the Logos desktop console to the rack unit. This
specially wired cable carries the serial data and power supply for the console.
Optionally, an extended 5 meter cable can be ordered.
