2TLA010051R0000 ABB Jokab Safety Sentry SSR20 Safety relay


ABB Jokab Safety Sentry SSR20 Safety relay

Sentry SSR20 Safety relay with relay outputs 3NO+1NC, +24 VDC supply voltage and screw terminals.
For monitoring of two-hand devices.
Manual or automatic reset selectable by switch on front.

Sentry safety relays cover various types of safety applications up to PLe / SIL3.
Basic models provide reliable supervision of simpler safety functions, while universal models provide advanced features and high flexibility.
Models with display offer preset configurations and extensive information to further simplify troubleshooting.
Additional variants offer a high accuracy timer function of ± 1% and an adjustable time setting range from 0-999 s.
High output current capacity of up to 6 A can save the use of an intermediary contactor. Multi-reset allows up to 10 safety relays connected to one reset light-button.
All models are available with detachable push-in or screw terminals. Terminals and coding kit to mark removed terminals are available as accessories.

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ABB Jokab Safety Sentry SSR20 Safety relay

ABB Jokab Safety Relay, 24V DC Supply Voltage, 3NO/1NC Relay Outputs – SSR20 Series – 2TLA010051R0000 Sentry SSR20


To ensure the safe operation of your machinery, install this safety relay from ABB Jokab. It works by simultaneously measuring the flow of current around your circuit and monitoring two input channels for connection to safety systems. In the event of a fault, it breaks the flow of current to machinery until it’s safe to resume operation. A multi-reset function minimises cabling and unnecessary downtime by letting manually reset the relay, along with up to 9 other safety relays, using a single reset button.


Features & Benefits

• LEDs provide easy troubleshooting if the master control relay is switched off due to a fault
• Compatible with two-hand devices to ensure the safety of the machine operator
• Dimensions of 22.5 (W) x 120 (H) x 120mm (D) to fit into compact spaces



• Hydraulic circuits
• Assembly machines
• Clutch presses
• Welder machines


How do I install this component?

This relay latches onto a DIN rail – simply push the rear side onto the rail until you hear a click. Screw terminals allow for easy connection to other safety modules.


Does this device have a time delay?

No, to minimise potential risks, the output is turned off as soon as the switch detects a fault.

คุณสมบัติ Value
Supply Voltage 24V dc
Safety Contacts 4
Function Safety Switch
Auxiliary Contacts 3
Reset Method Multi-Reset
Range Sentry
Safety Category ISO 13849-1 4
PL ISO 13849-1 e
SIL IEC 61508 3
Terminal Type Screw
Standards Met CCCs, CE, CULus, TUV
Configurable Yes
Width 120mm
Series SSR20
Depth 120mm
Length 22.5mm
Performance Level e
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