Communication-capable Circuit Breakers
• The ZSI module must be the first
external module to be connected,
if used.
• If the BDA is connected to the
front interface of the trip unit,
the cable must be no longer
than 0.5 m.
LED Display
The LEDs on the external
Cubicle
BUS
modules enable straightforward
module diagnosis and testing. As
explained in Tables 2-11 to 2-13,
the internal status and the
communications connection can be
diagnosed to ensure that they have
been wired correctly.
2/22
Table 2-11
The DEVICE LED indicates the state of the external
Cubicle
BUS
module.
Table 2-12
The
Cubicle
BUS
LEDs on the external
Cubicle
BUS
modules indicate whether communication
is taking place with other modules. This enables straightforward diagnosis.
Table 2-13
The LEDs indicate whether the outputs are set or the inputs are supplied with 24V DC
and have been activated.
Green
Connection exists to a different module
Off
No other
Cubicle
BUS
module detected
Yellow
On the input module, this indicates an ON
signal at the corresponding input. With
digital output modules, the output is
active when the contact closed. With
analog output modules, a yellow LED
indicates that the full-scale deflection
value has been exceeded by 20%.
Off
The LED is off if none of the above-
mentioned conditions are present
DEVICE LED
Meaning
Cubicle
BUS
LED
Meaning
All other LEDs
Meaning
Red
Internal error in the
Cubicle
BUS
module
Yellow
Cubicle
BUS
module in test mode
Green
Module in operation
WL Circuit Breaker
If a COM15 module is available, the external
Cubicle
BUS
modules can be integrated in the system by connecting them to the
Cubicle
BUS
cables supplied. The end of the
Cubicle
BUS
must be installed with a terminating resistor. The power supply unit can simply be connected
via the X3 interface.
Figure
2-11
WL PROFIBUS Communication and Electronic Accessories • July 2004
