DOLD LG 5933 and BG 5933 Two-Hand Relays Review: Specs, Price and Applications
Updated: 7 days ago
DOLD LG 5933 and BG 5933 evaluate two-hand operator controls for machinery with dangerous closing movements. The manufacturer describes Type III C operation, monitored external-contactor feedback and variant-specific output contacts in a compact relay format.
Quick Verdict
A relevant shortlist for a deliberately designed two-hand control function. Choose the actual relay and button-contact arrangement, then validate the operator position and complete machine response; two occupied buttons do not protect every person or hazard in the surrounding cell.
DOLD LG 5933 and BG 5933 Two-Hand Relays at a Glance
Primary role: Two-hand control evaluation
Manufacturer type scope: Type III C under EN ISO 13851
Input arrangement: Two pushbuttons with one NO and one NC contact each
LG 5933 contacts: Three NO and one NC
BG/BH contact scope: Two NO/one NC or three NO/one NC; exact variant applies
Feedback: Y1–Y2 for external-contact monitoring
LG/BG width: 22.5 mm; related BH differs
Thermal current maximum: Ith 5 A; load utilization conditions apply
Price: Request a quote for the exact ordering configuration.
Technical Specifications
Specification | Documented configuration |
Primary role | Two-hand control evaluation |
Manufacturer type scope | Type III C under EN ISO 13851 |
Input arrangement | Two pushbuttons with one NO and one NC contact each |
LG 5933 contacts | Three NO and one NC |
BG/BH contact scope | Two NO/one NC or three NO/one NC; exact variant applies |
Feedback | Y1–Y2 for external-contact monitoring |
LG/BG width | 22.5 mm; related BH differs |
Thermal current maximum | Ith 5 A; load utilization conditions apply |
Design and Build
Two-hand evaluation depends on the full button and contact arrangement. Specify the compatible actuators and wiring from the exact instructions rather than substitute two ordinary commands in the PLC application. The accepted function needs to recognize the intended operating sequence and loss of a required condition, not simply count two energized input bits.
The important design question is how the device participates in the complete safety function. A component, guard, controller and actuator must work together to deliver the intended behavior. The enclosure's access points, reset locations and maintenance arrangements should be included in that design. A safety-related product should therefore be selected from a defined machine requirement, rather than added late as an accessory.
Configuration and Integration
The operator's physical position is part of the protective concept. Define the task and machine response before locating the controls, and assess access by others separately. A two-hand function should not be described as complete perimeter protection or as a substitute for every guard required by the actual operation.
Commissioning should establish the behavior during normal operation, intervention and recovery. Test the complete sequence with the actual machine state, and ensure that restoring a component or closing a guard cannot produce an unintended restart. Operators need a clear distinction between permission to operate, permission to enter and the procedure used to isolate equipment for maintenance. The product's role should be documented in that distinction.
Applications and Use Cases
Engineered two-hand operation of presses and other defined closing-motion machinery.
LG, BG and the related BH variant have different contact and packaging configurations. Confirm the complete ordering code and preserve the external-contactor feedback arrangement. The 5 A thermal figure is not a universal switched-load rating, and a component-level PL/SIL scope remains conditional on the installed protective architecture.
The selection should be reviewed by the people responsible for the machine's safety design. Protective components can support a sound design, but they do not establish compliance for the complete cell on their own.
Alternatives and Selection
Compare LG 5933 and BG 5933 by their exact contacts, supply, terminals and approved button arrangement. Compare other two-hand evaluators using the same protective task and complete response. An ordinary PLC program with two inputs is not automatically an equivalent monitored architecture.
Price and Value
Price: Request a quote. The quotation should identify the exact product configuration, included options, delivery terms and support scope. Accessories and integration work should be listed separately so the hardware price can be compared on a like-for-like basis. A family name or headline specification is not a complete purchasing description.
Assess value against the work the product enables in the machine. Include the engineering needed to configure it, the equipment that must operate alongside it and the effort required to maintain or replace it. A lower component price can be outweighed by extra integration work, while additional features are valuable only when the application can use them. Compare written configurations rather than assumed package contents.
Pros and Cons
Pros
Purpose-defined two-hand evaluation with feedback monitoring
Several compact contact configurations
Cons
Button arrangement and operator location need application design
Variant differences and downstream loads require confirmation
Who Should Consider DOLD LG 5933 and BG 5933 Two-Hand Relays?
A relevant shortlist for a deliberately designed two-hand control function. Choose the actual relay and button-contact arrangement, then validate the operator position and complete machine response; two occupied buttons do not protect every person or hazard in the surrounding cell.
The strongest purchasing case is a clearly defined requirement that matches the documented configuration. If the project depends on a particular option, interface or mechanical arrangement, include it explicitly in the order. Keep the accepted configuration with the equipment documentation so a later replacement preserves the intended application.
Commissioning and Acceptance
Acceptance should cover the intended sequence, foreseeable misuse, fault conditions and restoration after an interruption. Inspect the installed mechanical alignment and electrical connections where applicable. Keep the selected product's instructions, ordering code and machine documentation together so a replacement is evaluated against the original safety design. A successful production cycle is not evidence that a protective function has been validated.
DOLD LG 5933 and BG 5933 Two-Hand Relays FAQ
What is DOLD LG 5933 and BG 5933 Two-Hand Relays?
DOLD LG 5933 and BG 5933 evaluate two-hand operator controls for machinery with dangerous closing movements. The manufacturer describes Type III C operation, monitored external-contactor feedback and variant-specific output contacts in a compact relay format.
Which configuration is reviewed?
Primary role: Two-hand control evaluation. Manufacturer type scope: Type III C under EN ISO 13851.
What is the main selection consideration?
A relevant shortlist for a deliberately designed two-hand control function. Choose the actual relay and button-contact arrangement, then validate the operator position and complete machine response; two occupied buttons do not protect every person or hazard in the surrounding cell.
What applications should it be considered for?
Engineered two-hand operation of presses and other defined closing-motion machinery.
What is a documented advantage?
Purpose-defined two-hand evaluation with feedback monitoring. Several compact contact configurations.
What limitation matters during integration?
Button arrangement and operator location need application design. Variant differences and downstream loads require confirmation.
What is the price?
Price: Request a quote. Specify the exact ordering configuration, required options, accessories and delivery terms.
How should an alternative be compared?
Compare LG 5933 and BG 5933 by their exact contacts, supply, terminals and approved button arrangement. Compare other two-hand evaluators using the same protective task and complete response. An ordinary PLC program with two inputs is not automatically an equivalent monitored architecture.
Product information: Industrial Safety Controls Inc supplier product information.
Pricing is quotation-based and may change. Options, availability, delivery and application requirements depend on the selected ordering configuration.
