Monitoring of the signal outputs is done to determine fault conditions. In the RS-422
mode, no input fault monitoring is done. A bi-color LED flashes with the data mark and
space signals. Status of the 8 outputs are displayed via 8 2-color LEDs on the front panel.
Faults cause the LED to glow red while no faults are displayed as green. No power to the
unit is indicated by no light coming from the LED’s. Note that turning any of the four
analog potentiometers down very low will result in an output fault. Faults typically are
reported at .5 V P-P output level.
Faults are also reported via the serial port or the Ethernet port on the rear panel of the
unit. Faults are reported when they happen and are reported again every 2 minutes. It is
possible to mask out continuing faults. A message is sent when the fault is cleared.
Operation:
Connect a suitable AC mains power source to the rear IEC connector. Connect an RS-422
signal to the RJ-45 RS-422 input connector and connect an audio signal to the RJ-45
Analog input connector. Turn on the AC power switch on the rear panel.
Rear Panel Connections:
Inputs:
(RS-422):
(1)
RJ-45 Shielded version
RS-422 Pin 7=D+, Pin 8=D-, sides= Gnd.
(Analog):
(1)
RJ-45 Shielded version
Analog Pin 4,5 – Balanced, transformer coupled
Outputs RS-422:
(RS-422):
(4)
RJ-45 Shielded version
RS-422 Pin 7=D+, Pin 8=D-, sides= Gnd.
