Digital Output Module with
Rotary Switch
The digital output module can be
used to output six events. These
events can be warnings or trips and
can be used for external annunciation
or control. A circuit breaker trip can
be wired to an Alarm Horn or Stack
Light.
The load shedding and load restoring
signals can enable a load to be
switched ON or OFF automatically
depending on the load.
The digital output module is available
in two versions. The “optocoupler”
version features solid state outputs.
The current carrying capacity of this
output is 150mA, and the nominal
voltage is 24V DC. Only DC voltage
can be switched. The “relay” version,
uses a relay contact with a maximum
load of 12A. Voltages of up 250V
AC/DC are possible. The relay
contacts are isolated.
The module is configured using
a rotary switch, which not only
selects one of the two output
module versions, but also sets
the appropriate delay time.
Selector switch position to the left
If the rotary switch is positioned
to the left, outputs 1 through 6
are assigned the following events:
• Output 1: Long-time trip (L)
• Output 2: Short-time trip (S)
• Output 3: Instantaneous trip (I)
• Output 4: Ground fault trip (G)
• Output 5: Ground fault alarm signal
• Output 6: Trip as a result of
overload in the neutral conductor
(N)
Selector switch position to the right
If the rotary switch is positioned
to the right, the 6 outputs are
automatically assigned the following
functions:
• Output 1: Leading overload trip
signal (delay time 0s)
• Output 2: Trip unit error (ETU)
• Output 3: Load shedding
• Output 4: Load restoring
• Output 5: Temperature alarm
• Output 6: Current phase unbalance
Delay time
The rotary switch can also be used to
set an additional delay time. Available
times are 0, 0.2 s, 0.5 s, 1 s, and 2 s.
These can be used, for example, to
suppress events that only last a short
time and not output them until they
have been present for a long period
(e.g. phase unbalance).
Irrespective of the delay time that has
been set, the signal for the leading
overload trip, which can be used to
switch off and protect connected
frequency converters, is always
instantaneous.
A maximum of two digital output
modules with rotary switches can be
operated simultaneously on one WL
Circuit Breaker, otherwise erroneous
outputs may occur. They must be
configured opposite each other.
One in the operating mode with
the switch position to the left and
one with the switch position to
the right.
The LEDs display the current state of
the 6 outputs. If the LED is OFF, the
corresponding output is OFF. If the
LED is yellow, the output is ON.
Communication-capable Circuit Breakers
2/25
Table 2-16
This table provides accurate technical data for the digital output module with rotary
switch on the
Cubicle
BUS
.
Operating voltage min. / max.
19.2V / 28.8V
Operating current min. / max. optocoupler
29mA / 63mA
Operating current min. / max. relay
29mA / 250mA
No. of isolated channels per digital output module
6
Max. current rating for optocoupler output with 24V DC
100mA
Max. current rating for relay output with 24V DC / 250 V AC / 250V DC
5A / 5A / 0.25A
Max. no. of digital output modules on one
Cubicle
BUS
2
Power loss min. / max.
0.74W / 5.4W
Dimensions W / H / D
70mm / 86mm /95mm
Weight (optocoupler / relay)
0.223 kg / 0.321 kg
Temperature range
-20°C / 60°C
Technical data for the digital output module with a rotary selection switch
WL Circuit Breaker
Switch positioned to left / right
selects events in dark-gray /
light-gray fields.
Figure
2-14
WL PROFIBUS Communication and Electronic Accessories • July 2004
