DQSRN Safety Relay Module
DIN-rail safety relay with DIP-switch selectable E-stop, OSSD, door interlock, two-hand inputs, Cat.4/PLe/SIL3.
🔍 Click to enlarge · 1/4Technical Specifications
| Input modes | 4 DIP-switch selectable modes: E-stop button / safety light curtain OSSD (single/dual-channel PNP) / safety door interlock / two-hand control device |
|---|---|
| Safety rating | Category 4 / PL e per EN ISO 13849-1; SIL 3 per IEC 61508 |
| Output contacts | 3 N.O. + 1 N.C., forcibly guided (positively driven) contacts |
| Contact material | AgSnO2 + 0.2 µm gold plating |
| Contact rating | AC-1 6A/250VAC; AC-15 4A/240VAC; DC-1 6A/24VDC; max 12A |
| Minimum load | 10 mA / 5 V |
| Response time | < 30 ms |
| Supply voltage | DC24V (+10%/-20%) |
| Power consumption | 2.9 W |
| Housing / mounting | 45 mm wide, standard DIN rail |
| Protection rating | IP30 |
Overview
DQSRN is a DIN-rail-mounted safety relay module (also referred to in DAIDISIKE's catalog as a safety monitoring relay) that takes a safety input device — an E-stop button, a safety light curtain's OSSD outputs, a safety door interlock switch, or a two-hand control device — and, once it detects the input is in its safe/actuated state, opens forcibly guided output contacts to cut power to hazardous machine motion.
It is intended for machine builders, panel integrators, and safety engineers who need a single, DIN-rail-mounted relay to interface one of these four input types into a machine's safety circuit, and who may want to standardize on one relay model rather than stocking a different relay for each input type. Via DIP switch, the installer selects which of the four input modes DQSRN monitors, and the module is rated Category 4 / PL e per EN ISO 13849-1 and SIL 3 per IEC 61508.
Features & Benefits
One module, four DIP-switch selectable safety input modes
Instead of choosing a different dedicated relay for each type of safety device, DQSRN lets the installer select via DIP switch which input it monitors: E-stop button, safety light curtain OSSD (single- or dual-channel PNP), safety door interlock, or two-hand control device. One module covers four common machine-safety input types, cutting spare-part inventory and selection errors.
Category 4 / PL e per EN ISO 13849-1, SIL 3 per IEC 61508
This is the highest safety category and performance level defined by EN ISO 13849-1, and the highest safety integrity level commonly specified for machine safety functions — suitable for high-risk machine safety circuits.
3 N.O. safety contacts + 1 N.C. auxiliary contact, forcibly guided design
Three normally-open contacts can switch multiple loads (e.g. two contactors plus a valve) while the normally-closed auxiliary contact feeds a status signal back to a PLC or indicator. The forcibly guided mechanism ensures the N.O. and N.C. contacts can never be closed at the same time, so a welded/stuck contact becomes detectable.
AgSnO2 gold-plated contacts cover power-level and signal-level switching
The same contact set is rated AC-15 4A/240VAC — suitable for switching contactor coils — while also being reliable down to a 10 mA/5 V minimum load for low-level PLC input signals, avoiding false-contact issues at small currents.
Response time under 30 ms
From safety input trigger to output contact opening, DQSRN's response time is under 30 ms. Per the ISO 13855 minimum-distance formula, a faster response allows a guard device to be mounted closer to the hazard point.
Standard 45 mm DIN rail housing, wide-tolerance 24 VDC supply, 2.9 W
Snaps onto standard DIN rail in a control cabinet, accepts DC24V with a wide +10%/-20% tolerance, and draws only 2.9 W, keeping cabinet heat low.
Compatible controller option for DAIDISIKE's passive safety devices
DQSRN is listed in the DQSA passive safety light curtain catalog as one of several compatible controllers, and JT14 safety mats (a passive dry-contact device) are documented as requiring connection to a safety relay such as DQSRN.
Applications
Models & Ordering Information
DQSRN safety relay module
DQSRP two-hand control relay module
How to Select
- If you need to monitor a transistor-type safety device signal (PNP/OSSD), choose the two-channel transistor/OSSD signal monitoring variant of DQSRN.
- If you need to monitor a normally-closed switch-type safety device, such as a mechanical safety door interlock switch, choose the two-channel N.C. switch monitoring variant of DQSRN.
- If you need to monitor a two-hand control device, choose DQSRP.
- If you need to switch between E-stop, light curtain OSSD, safety door interlock, and two-hand control inputs on one unit, choose the base DQSRN model with the 4-mode DIP switch.
- All documented versions operate on DC24V supply, so power-supply selection is compatible with standard PLC/relay-cabinet 24V sources.
- Contact your DAIDISIKE representative to confirm the exact contact rating, response time, housing dimensions, and protection rating for the specific unit version being ordered, since our source catalogs show differences across document versions.
📘 Need the full method? How to Choose a Safety Door Switch / Interlock
When NOT to specify the DQSRN — and what to use instead
Needing a device that itself senses a light-curtain beam break, e-stop pull, or door position
Why not: DQSRN is a downstream relay module that monitors the DIP-switch-selected input signal from an existing safety device; it does not sense anything on its own.
Use instead: Pair DQSRN with a DAIDISIKE light curtain (DQC/DQA/DQT/DQT4), a DX safety door lock, or an e-stop pushbutton wired to its input
Panel space is extremely tight and DIN-rail width must be minimized
Why not: DQSRN's housing is a standard 45 mm wide DIN-rail module per the primary source table, not an ultra-slim design.
Use instead: DA31 (22.6 mm ultra-slim housing)
Two-hand control device monitoring is the only function needed and a dedicated single-purpose module is preferred
Why not: DQSRN's base model covers e-stop/OSSD/door interlock via DIP switch, while two-hand control monitoring is documented as a separate model in the same series.
Use instead: DQSRP
A safety file requires one single, internally consistent response-time/IP/dimension figure with no source conflicts
Why not: Our own source catalogs give two different figures for response time (<30ms vs <15ms), enclosure rating (IP30 vs IP50), and housing dimensions (45mm DIN-rail vs 117x100x22.5mm) across document versions.
Use instead: Confirm the exact figures for the specific unit version with the factory before finalizing documentation
The connected safety input device has its own PL or Category rating lower than Cat.4/PLe
Why not: DQSRN is specified to achieve Cat.4/PLe/SIL3 on its own, but per EN ISO 13849-1 the achieved PL of the overall safety function depends on every component in the chain, not the relay alone.
Use instead: Verify the PL/Category of every component in the safety chain before assuming the system reaches Cat.4/PLe
Specifications we do not publish yet
We only publish a figure once we are confident it is true. The items below are still being validated through further testing and real-world customer feedback, so for now we would rather leave them open than guess. If one of them matters to your design, ask us for the latest validated status.
- Contact material/rating discrepancy between source catalogs (AgSnO2 + gold-plated AC-1/AC-15/DC-1 figures used here vs an alternate source's AC15 5A/250V, DC13 6A/24V) — confirm which applies to the currently shipped unit
- Response time shows conflicting figures across source catalogs (<30ms vs <15ms)
- Ingress protection rating shows conflicting figures across source catalogs (IP30 vs IP50)
- Housing dimensions show conflicting figures across source catalogs (45mm DIN-rail width vs 117x100x22.5mm)
- Relay mechanical/electrical life-cycle rating (one source lists >=1,000,000 operations, not confirmed as current)
- Operating temperature range
- Certificate numbers and issuing body for the stated Cat.4/PLe/SIL3 rating
- Exact model-code suffixes distinguishing the two DQSRN monitoring variants (transistor/OSSD vs N.C. switch)
Frequently Asked Questions
What safety input devices can DQSRN monitor?
What safety category and performance level is DQSRN rated for?
What is the output contact configuration?
What contact material does DQSRN use, and what loads can it switch?
How fast does DQSRN respond after a safety input is triggered?
What power supply does DQSRN require?
Can DQSRN be used with DAIDISIKE's passive safety light curtains or safety mats?
What mounting format does DQSRN use?
Can DQSRN switch to two-hand control device monitoring?
What certifications does DQSRN carry?
Works Well Together
On the same machine or line, DQSRN is typically ordered together with: Safety Light Curtains · Safety Door Locks & Switches · Safety Mats
DCE Automation Safety Light Curtain
Compact through-beam safety light curtain in a 30 x 30 mm housing: 10/20/30/40 mm beam pitch, up to 72 beams, 0.3-3 m or 0.3-6 m sensing distance, NPN/PNP output. Designed to the Type 4 architecture of IEC 61496-1/-3 and Category 4 (PLd) of ISO 13849-1.
DX-C1 Magnetic Coded Safety Switch
Non-contact coded-magnet safety switch with 17 mm sensing range and high misalignment tolerance for guard doors.
JT14 Safety Mat (Economical)
Economical pressure-sensitive safety mat with volt-free N.O. output for large-area or custom-shape floor guarding.
