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1SDA073771R1 ABB RTC 24V E1.2 Ready-to-Close Signalling Contact
ABB 1SDA073771R1 is a 24 V DC RTC ready-to-close signalling contact with one change-over contact for compatible Emax 2 E1.2 air circuit breakers.
£229.94
Why Choose the ABB 1SDA073771R1 RTC 24V E1.2 Ready-to-Close Contact?
The ABB 1SDA073771R1 is an RTC 24 V DC ready-to-close signalling contact designed for ABB Emax 2 E1.2 air circuit breakers. Part of the advanced ABB Emax 2 air circuit breaker accessory range, it provides an electrical indication that the circuit breaker is in the correct operating condition and ready to receive a closing command.
The RTC contact is particularly useful in automated power distribution systems where the breaker’s readiness for closing must be monitored remotely. The signalling contact changes state when the required conditions for circuit breaker closing are satisfied, allowing this information to be integrated into control circuits, PLCs, remote indication systems and switchboard automation equipment.
Designed for the ABB Emax 2 E1.2 frame, the 1SDA073771R1 is the 24 V DC version of the RTC ready-to-close contact and provides one change-over (SPDT) auxiliary contact. It is also suitable for compatible ABB Tmax XT7 and XT7M circuit breakers, providing a versatile signalling solution across ABB low-voltage protection platforms.
Key Advantages
- Provides reliable ready-to-close circuit breaker status signalling.
- 24 V DC version suitable for low-voltage control and automation systems.
- Designed for ABB Emax 2 E1.2 air circuit breakers.
- Provides one change-over (SPDT) auxiliary contact for external signalling.
- Supports integration with PLCs, remote indication and switchboard automation systems.
- Also suitable for compatible ABB Tmax XT7 and XT7M circuit breakers.
Key Features
- ABB RTC ready-to-close signalling contact.
- 24 V DC signalling version.
- Compatible with Emax 2 E1.2 air circuit breakers.
- One change-over (SPDT) auxiliary contact.
- Signals when the circuit breaker is ready for a closing operation.
- Suitable for remote breaker status monitoring.
- Compatible with specified Tmax XT7 / XT7M applications.
- ABB order code 1SDA073771R1.
Reliable Ready-to-Close Status Signalling
A ready-to-close signalling contact allows an electrical control system to determine whether a circuit breaker is in the correct condition to perform a closing operation. This information is valuable in automated switchboards, remote-control installations and power management systems where a closing command may be issued without an operator standing directly in front of the breaker.
The ABB 1SDA073771R1 provides this functionality through a single change-over contact for the Emax 2 E1.2 platform. Its 24 V DC configuration makes it well suited to modern industrial control circuits, enabling ready-to-close status information to be incorporated into PLC logic, indication circuits and supervisory control systems.
Typical Applications
- ABB Emax 2 E1.2 air circuit breaker installations.
- Ready-to-close circuit breaker status indication.
- Industrial low-voltage switchboards.
- PLC and automation system status inputs.
- Remote circuit breaker control and monitoring systems.
- Compatible ABB Tmax XT7 and XT7M circuit breaker applications.
Technical Specifications
| Series | Emax 2 |
|---|---|
| Product group | Emax 2 Air Circuit Breaker |
| Model / order code | 1SDA073771R1 |
| Type | RTC 24V E1.2 |
| Product type | Ready-to-close signalling contact |
| Voltage version | 24 V DC |
| Number of auxiliary contacts | 1 |
| Contact configuration | Change-over (SPDT) |
| Emax 2 compatibility | E1.2 |
| Additional compatibility | Tmax XT7 / XT7M |
| Function | Ready-to-close status signalling |
| Configuration | Loose or configurable accessory |
| Standard | IEC |
| ETIM classification | EC000041 – Auxiliary contact block |
| UNSPSC | 39121522 |
Frequently Asked Questions
What is the ABB 1SDA073771R1 used for?
The ABB 1SDA073771R1 is an RTC ready-to-close signalling contact used to indicate electrically when a compatible circuit breaker is in the correct condition to receive a closing command.
What voltage is the ABB 1SDA073771R1 designed for?
The 1SDA073771R1 is the 24 V DC version of the ABB RTC ready-to-close signalling contact.
Which ABB Emax 2 circuit breaker is compatible with the 1SDA073771R1?
The accessory is designed for the ABB Emax 2 E1.2 air circuit breaker frame.
How many auxiliary contacts does the ABB 1SDA073771R1 provide?
The RTC accessory provides one change-over (SPDT) auxiliary contact for ready-to-close status signalling.
Can the ABB 1SDA073771R1 be used with Tmax XT circuit breakers?
Yes. In addition to the Emax 2 E1.2 platform, the 1SDA073771R1 is specified for compatible ABB Tmax XT7 and XT7M circuit breakers.
Trusted ABB Circuit Protection Technology
ABB Emax 2 ready-to-close signalling contacts support dependable circuit breaker monitoring and automation, allowing control systems to identify when compatible breakers are ready for a closing operation in industrial and commercial power distribution installations.
