Communication-capable Circuit Breakers

WL Circuit Breaker

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.

Technical data for the digital output module with a rotary selection switch

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 CubicleBUS

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

 

 

Table 2-16This table provides accurate technical data for the digital output module with rotary switch on the CubicleBUS.

2/25

 

 

Figure

Switch positioned to left / right

selects events in dark-gray /

2-14

light-gray fields.

 

 

 

WL MODBUS Communication and Electronic Accessories • January 2005

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Image 36
Siemens UL1066, UL 489 Digital Output Module with Rotary Switch, Selector switch position to the left, Delay time

UL 489, UL1066 specifications

Siemens UL1066 and UL489 are essential components in the landscape of electrical equipment, specifically in circuit protection and control. These standards ensure reliability, safety, and efficiency in various applications, including industrial, commercial, and residential settings.

The Siemens UL1066 is primarily focused on disconnect switches. These devices are designed to isolate electrical circuits, ensuring the safety of both personnel and equipment during maintenance or in case of faults. One of the key features of UL1066 disconnect switches is their high breaking capacity, enabling them to handle significant fault currents without failure. This characteristic is crucial in protecting downstream equipment from damage caused by short circuits. The UL1066 switches are also known for their robust construction, often featuring a metal enclosure that enhances durability and environmental resistance. Additionally, these switches can be operated manually or remotely, offering flexibility in operation and control.

On the other hand, Siemens UL489 circuit breakers provide comprehensive protection against overcurrents and short circuits. These devices not only interrupt fault currents but also protect connected devices from damage due to overload situations. Key features of UL489 circuit breakers include adjustable trip settings, which allow users to customize the response to overcurrent conditions based on specific application requirements. This adaptability makes them suitable for a wide range of environments, from large industrial plants to smaller commercial buildings.

Both UL1066 and UL489 products are constructed with advanced technologies, such as thermal-magnetic or electronic trip mechanisms in UL489 devices, ensuring precise and timely interruption of fault currents. These technologies promote energy efficiency and stability within electrical systems. In addition, many of these devices are equipped with indication features, providing clear visual status cues for quick assessment in emergency situations.

In terms of characteristics, both UL1066 and UL489 devices adhere to rigorous testing and certification processes to meet UL standards. This compliance assures users of their performance and reliability. Furthermore, the devices are designed to accommodate a wide range of operating temperatures and environmental conditions, making them versatile choices for various applications.

In summary, Siemens UL1066 and UL489 devices are paramount in ensuring safety and efficiency in electrical circuits. Their advanced features and robust construction make them indispensable in protecting both personnel and equipment in an array of industrial and commercial applications.