Woodward LS-521 V2 (Option K12) Circuit Breaker Control Unit

3.2.7 Interface Configuration

CAN baud rate (20 kbit/s to 1 Mbit/s), CANopen master-slave mode, RS-232 parameters, etc.

Operation and Display

4.1 Front panel layout

Mode button: Switch between manual/automatic mode.

Function buttons: alarm list, main menu, parameter settings, confirm, return, etc.

Indicator lights: System A/B status, circuit breaker status, alarm indication.

4.2 Screen Structure and Navigation

Main screen: displays key parameters such as A/B voltage, frequency, and power of the system.

Alarm List: Display unconfirmed alarms and their occurrence times.

Parameter menu: Access configuration items.

Main menu: Measurement Value, Synchronous Oscilloscope, Counter, Diagnosis, Event History, etc.

4.3 Synchronous oscilloscope function

Graphically display the phase angle difference between system A and B to assist in synchronous operation.

LogicsManager Logic Manager

5.1 Function Overview

LogicsManager allows users to customize control sequences through logical combinations, such as relay actions, alarm responses, etc.

5.2 Logical Elements

Command variables: including alarm class, system status, discrete input/output, etc.

Operators: AND, OR, NAND, NOR, XOR, etc.

Output: Relay or internal function.

5.3 Application Examples

By combining discrete inputs, system states, and alarm conditions, complex chain control logic is achieved.

6、 Communication Protocol and Data Exchange

6.1 CANopen Protocol

Sending messages: 4 fixed messages, including voltage difference, frequency difference, phase angle, power, status bit, etc.

Receiving messages: Remote control messages used for circuit breaker operation, alarm confirmation, etc.

6.2 Data Format

Voltage, current, power and other data with scaling factors support the transmission of large-scale measurement values.

Technical data and performance

7.1 Electrical Parameters

Power supply: 8-40 Vdc, power consumption approximately 6W.

Voltage measurement: 120 Vac (maximum 150 Vac) or 480 Vac (maximum 600 Vac).

Current measurement: 1A or 5A CT input, linear range 1.5 x rated value.

Discrete input: 8-40 Vdc, input resistance of approximately 20 k Ω.

Relay output: Contact capacity 2A @ 250 Vac, 2A @ 24 Vdc.

7.2 Environment and Machinery

Working temperature: -20 ° C to+70 ° C.

Protection level: Front panel IP54 (clamp) or IP66 (screw), rear panel IP20.

Vibration and impact: Complies with EN 60255-21 and MIL-STD-810 standards.

Certification: CE, UL/cUL, LR classification society certification.

7.3 Measurement accuracy

Frequency: ± 0.1% (range 85 Hz).

Voltage: ± 1% (range 120/480 V).

Current: ± 1% (range 1/5 A).

Power: ± 2% (range voltage x current).

Appendix and Maintenance Information

8.1 Interference Suppression Circuit

When connecting a 24V relay, it is recommended to use diodes, varistors, or RC circuits to suppress turn off voltage spikes.

8.2 Alarm classification

Class A: Only display, no relay action.

Class B/C: Trigger alarm light and horn.

Class D/E/F: Immediately open the circuit breaker.

8.3 Event History

Record 300 events, including status changes, alarms, and operation records.

8.4 Service Support

Before returning for repair, an authorization number (RAN) must be applied for in advance.

Provide technical assistance, training, on-site debugging and other services