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Communication-capable Circuit Breakers
WL Circuit Breaker
PROFIBUS Installation Guideline
The Com15 must be assembled and connected to the
PROFIBUS as described in the PROFIBUS Installation
Guideline (Order No. 2.112 from the PROFIBUS User
Organization www.profibus.com). Of particular
importance is the requirement to ground the shield
of the PROFIBUS cable.
PROFIBUS Write Protection (DPWriteEnable)
Write access via communications can be blocked
either temporarily or permanently.
The COM15 module features a hardware input for this
purpose. Pin 1 provides the 24V DC supply, which can
be connected to pin 2.
If this input is not bridged, write access and control is
disabled.
The following actions are blocked if the input of the
write-protect function has not been enabled:
• Breaker open/close
• Reset the last trip
• Change the protective parameters
• Change the parameters for the extended protection
function (metering function)
• Change the communication parameters
• Settings of the metering options
• Reset maintenance information (counters)
• Force the digital outputs
The following control functions are available even if
the write protection function has not been enabled:
• Change and set the trigger functions for the
waveform buffer
• Read the content of the waveform buffer
• Change the setpoint parameters
• Set/change the system time
• Change the free texts (comments, system IDs)
• Reset the min./max. values
• Change the unassigned user output
2/9
This diagram illustrates how to wire the COM15 module if PROFIBUS is to
Graphic
be used to switch the device open and closed. This diagram only applies
2-3
to 24V DC control voltage.
Interposing relays are required if a control voltage different than 24V DC
Graphic
is used. If the 1st shunt trip is not used to switch off the device, use
2-4
terminals X9.1 and X9.2 to utilize the 2nd shunt trip.
WL PROFIBUS Communication and Electronic Accessories • July 2004
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