OPU-1
UNIVERSAL POWER-LINE CARRIER SYSTEM TYPE OPU-1
GENERAL DESCRIPTION - Rev 7 (May 2019)
51/67
5.5
USER INTERFACES
Analog channel (IOPU option)
Available band
From 300 to 3850 Hz
Interface
Two 4-wire inputs and outputs per channel
Nominal impedance
600
, balanced
Return loss
Better than 14 dB in accordance with IEC 495
Nominal level
Programmable between
–20 dBm and +6 dBm
Limiter action in base-band inputs
In accordance with IEC 495 cls. 5.3.1.9
Base-band output blocking
For pilot loss and/or low S/N ratio with an
independent threshold value for each output
Link amplitude distortion
In accordance with IEC 495 figure 9.
Three terminals connected in cascade also
comply with M.1020 figure 1
Link group-delay distortion
In accordance with IEC 495 figure 10.
Three terminals connected in cascade also
comply with M.1020 figure 2
E and M signalling
Transmission
By means of optocoupler. Input voltage
between 30 V and 150 V
Reception
By
means
of
relay.
Contact
rating:
1 A/250 V
AC
Pulse distortion of
telephone signalling
10%
External teleprotection input
Any whole-band input can be used for the
transmission of a teleprotection signal, and
can be programmed with a signal-level
percentage of between 10% and 100% in the
command signal
Boosting control
By means of optocoupler. Input voltage
between 30 V and 150 V
