Allen‑Bradley Lifeline ™ 4 Pull rope emergency stop switch

Product positioning

Lifeline ™  4 is a cable pull rope emergency stop switch used for emergency shutdown of conveyors and long-distance equipment. Pulling the rope or pressing the emergency stop button at any position can trigger a safe shutdown.

Core Features

Pull rope distance

Standard Type: Maximum 75m

Extended type: 75-125m

integrated design

The top cover comes with a mushroom head emergency stop button (compliant with ISO 850)

The top cover comes with a cable status indicator light (ONED/SLACK)

The rope pulling action/relaxation is mechanically locked and must be manually reset by rotating the blue reset button

Contact configuration

Scheme 1:2 NC+2 NO

Option 2: 3 NC+1 NO

The safety contact is a direct disconnect type to ensure safety

Protection and Structure

Protection level: IP66

Shell: Zinc based die cast alloy (LM24)

Eye nut: stainless steel

Color: Yellow shell+Blue reset button

Key technical parameters

Parameter values

The maximum cable span standard is 75m, with an extension of 125m

Typical operating tension of 103N

Locking tension typical 188N

Minimum operating force ＜ 125N (300mm deflection)

Electrical lifespan (100mA) 1 × 10 times

Protection level IP66

Safety level Cat.4/PLd/SIL2/SIL3

Interface 5pin/8pin M12, 12pin M23

Certification IEC 60947-5-1, IEC 60947-5-5

Model and Interface

Main model: 440E-L13042

Interface type:

5‑pin M12

8‑pin M12

12‑pin M23

Can connect to ArmorBlock Guard I/O

Recommended matching (safety relay)

Model safety output auxiliary output reset

MSR127RP 3 NO 1 NC Manual Monitoring

MSR127TP 3 NO 1 NC Automatic/Manual

MSR126T 2 NO – Automatic/Manual

MSR30RT 2 NO Solid State 1 NO Solid State Manual/Automatic

Standard accessories

Tensioning spring: 440E-A13078

Inner and outer corner pulleys: 440A-A17101/17102

Installation bracket: 440E-A17130

Cable fixing, connectors, indicator lights, light bulbs

Working principle

Normal: Cable tension, contacts maintain output

Action: Pull rope or press emergency stop → Contact immediately disconnects+mechanical lock

Reset: The blue reset button must be rotated to restore

Protection: If the cable is too loose, it will automatically lock to prevent misoperation and the impact of thermal expansion and contraction

Typical applications

Emergency stop of the entire belt conveyor line

Long distance, irregular equipment area protection

Workshop conveyor lines, warehousing and logistics equipment

Key questions and answers

Question 1: Lifeline ™  What is the function of “mechanical locking” for 4? How must it be reset?

answer:

The function is to keep the contact open after pulling the rope or emergency stop action, to prevent danger caused by accidental restoration of power supply, and to suppress the effects of false tripping and thermal expansion and contraction.

The blue reset knob must be manually rotated to unlock and restore the contacts, and automatic reset is not possible.

Question 2: How long can this product cover? How to distinguish different length models? How to choose on-site?

answer:

Maximum coverage of 125m; divided into two models: standard 75m and extended 75-125m.

Conveying distance * * ≤ 75m * *: Select standard type

75-125m: Choose the extended type

Multiple units need to be connected in series for use over 125m.

Question 3: How does 240E-L13042 meet safety requirements? What level of security system can be used?

answer:

Adopting a direct disconnect safety contact, it is forcibly disconnected during rope pulling/emergency stop actions to meet high safety levels.

Can be used for:

ISO 13849-1：Cat.4 / PLd

IEC 62061：SIL2 / SIL3

Suitable for emergency stop circuits with high safety requirements such as conveyors, packaging lines, and machine tools.