Why Choose the ABB Sentry SSR32 24VDC 2TLA010052R0400 Safety Relay?
The ABB Sentry SSR32 24VDC 2TLA010052R0400 is a compact safety relay with immediate and delayed safety outputs for monitoring safety-related circuits in industrial machinery and automation systems. Part of ABB's Sentry SSR range, the SSR32 is designed for safety devices with contacts using one or two equivalent channels, as well as safety devices equipped with OSSD outputs such as compatible light curtains and other electro-sensitive protective equipment.
Operating from a 24 V DC supply, the SSR32 provides 2 NO immediate safety outputs plus 2 delayed NO safety outputs. The two delayed contacts have a fixed 0.5 s OFF-delay, allowing part of the safety circuit to remain active briefly after a stop demand while the two immediate contacts switch without the intentional delay.
The SSR32 supports manual or automatic reset, selectable using a switch on the front of the relay, and can monitor emergency stops, gate switches and compatible OSSD safety devices. The 2TLA010052R0400 version uses screw-compression connection blocks and has a slim 22.5 mm wide DIN rail housing. ABB specifies safety performance up to PL e, making the SSR32 suitable for demanding machinery safety applications when correctly integrated and validated.
Key Advantages
- Combines immediate and delayed failsafe relay outputs in one compact safety relay.
- 2 NO immediate + 2 NO delayed safety outputs.
- Fixed 0.5 s OFF-delay on the two delayed normally open outputs.
- 24 V DC supply for standard industrial safety-control systems.
- Monitors safety devices with single-channel or dual equivalent-channel contacts.
- Supports compatible safety devices with OSSD outputs.
- Suitable for emergency-stop and safety gate monitoring.
- Manual or automatic reset selectable from the front of the relay.
- Safety performance up to Performance Level e (PL e).
- Compact 22.5 mm wide construction saves control-panel space.
Key Features
- ABB Sentry SSR32 safety relay.
- Manufacturer part number 2TLA010052R0400.
- 24 V DC supply voltage.
- 2 NO immediate failsafe relay outputs.
- 2 NO delayed failsafe relay outputs.
- 0.5 s fixed OFF-delay on delayed outputs.
- Monitoring of safety devices with contacts.
- Single-channel safety-device monitoring capability.
- Dual equivalent-channel safety-device monitoring capability.
- Monitoring of compatible OSSD / PNP safety outputs.
- Emergency-stop monitoring.
- Safety gate-switch monitoring.
- Manual / automatic reset selection.
- Front-mounted reset-selection switch.
- LED indication supports status monitoring and diagnostics.
- Screw-compression connection blocks.
- IP20 protection.
- 35 mm DIN rail mounting.
The ABB Sentry SSR32 combines two immediate and two time-delayed safety contacts within a single 22.5 mm wide relay. When the monitored safety circuit changes to its unsafe state, the two immediate safety outputs can switch directly while the other two normally open contacts remain active for the fixed 0.5 s OFF-delay before opening. This allows safety-system designers to implement a controlled sequence between different machine functions without requiring a separate external timing relay.
Input monitoring supports safety devices with contacts using either one channel or two equivalent channels, together with compatible OSSD-output devices. The reset method can be configured for manual or automatic operation using the front-mounted selector, enabling the SSR32 to be adapted to the restart requirements of the machinery safety function.
Typical Applications
- Emergency-stop safety circuits.
- Safety gate and guard-switch monitoring.
- Light curtain and OSSD safety-device monitoring.
- Machinery requiring immediate and delayed safety outputs.
- Controlled machine stopping sequences.
- Motor, drive and contactor shutdown sequencing.
- Production and packaging machinery.
- Conveyor and material-handling equipment.
- Automated manufacturing and assembly systems.
- Industrial control panels requiring a fixed 0.5 s safety OFF-delay.
