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- F121×04
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PRODUCT DESCRIPTION
F121×04 F121 safety relay
TESCH F121×04 is a safety relay for hardwired emergency-stop and monitored-reset circuits. It has three normally open safety contacts, one normally closed auxiliary contact and a short-circuit-protected semiconductor output.
The relay supports Category 4 safety arrangements with Category 0 stopping. Documented supply variants include 24 V AC/DC and several AC voltage options; the selected variant must be identified from its label. Its IP20 terminals, IP40 housing and specified reset response times define the installation limits.
The relay supports Category 4 safety arrangements with Category 0 stopping. Documented supply variants include 24 V AC/DC and several AC voltage options; the selected variant must be identified from its label. Its IP20 terminals, IP40 housing and specified reset response times define the installation limits.
BEFORE YOU BUY
Confirm the complete F121×04 identity
ACTUAL APPLICATIONS
Application fields for F121×04
Three model-specific application areas are listed for F121×04, with two related application fields under each heading.
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01 · INDUSTRIAL MANUFACTURING
Discrete Manufacturing and Industrial Assembly
Automotive component manufacturing and precision assemblyIndustrial materials processing and product assembly -
02 · CHEMICAL PROCESSING
Chemical and Pharmaceutical Production
Chemical formulation and batch production areasPharmaceutical manufacturing and regulated processing areas -
03 · WAREHOUSING & LOGISTICS
Distribution and Material Handling
Warehouse distribution and order fulfillment areasBulk materials handling and logistics areas
Technical specifications for F121×04
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Product ModelF121×04
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Product ParametersF121 safety relay
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ManufacturerTESCH
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Safety categoryCategory 4
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Stop categoryCategory 0
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Safety contacts3 NO
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Auxiliary contact1 NC
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Semiconductor output1, short-circuit protected
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Rated supply options230 / 115 / 42 V AC; 24 V AC/DC
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Power consumption4 W
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Rated insulation voltage250 V
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Test voltage2.5 kV
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Terminal protectionIP20
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Housing protectionIP40
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Ambient temperature−5 to +55 °C
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Monitored reset response<60 ms
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Automatic reset response<600 ms
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Emergency-stop release<20 ms
View all additional
Alternative Names
F121×04
F121 machine safety relays F121 safety relay
TESCH F121 safety relay
SYSTEM & REPLACEMENT CHECK
Information needed before ordering
Three direct checks to secure your system integration and minimize ordering risks.
Information
System integration
Replacement check
Manuals & support
SYSTEM INTEGRATION
Integrate F121×04 with the documented configuration
Match the 24 V AC/DC supply and the three normally-open safety outputs to the validated machine safety circuit. The F121×04 has three normally open safety contacts, one normally closed auxiliary contact and a Y31–Y32 status output.
Verify monitored or automatic reset selection, feedback-loop wiring and cross-fault detection before energizing the relay. Use the documented 24 V AC/DC supply variant and verify the X5/S33 feedback loop, reset selection and cross-fault detection.
Confirm the required Category 4 architecture and Stop Category 0 behavior through a controlled safety-function test.
Features:
- Exact F121×04 identity
- 24 V AC/DC safety-control variant
- hardwired safety contacts
Use the complete F121×04 identity and its documented electrical and interface values when integrating the F121 safety relay. Verify the installed configuration before commissioning.
INTERCHANGEABILITY
Verify F121×04 before replacement
Record the F121×04 suffix, supply version, terminal wiring and reset mode before removing the installed relay. The F121×04 has three normally open safety contacts, one normally closed auxiliary contact and a Y31–Y32 status output.
Check the replacement for three safety contacts, one auxiliary contact and the semiconductor status output. Use the documented 24 V AC/DC supply variant and verify the X5/S33 feedback loop, reset selection and cross-fault detection.
After installation, test emergency-stop release time, contact feedback and every connected guard or light-curtain function.
Features:
- Complete label and revision
- Recorded wiring and configuration
- Controlled post-installation functional test
Match the complete F121×04 marking and the installed configuration before replacement. Preserve the approved settings and verify the relevant electrical and interface functions after installation.
DOCUMENTATION STATUS
Browse the Manuals, Datasheets, Official Documents, Links
Important Notice: Official documents are provided through manufacturer links. Accessories, manuals, cables, calibration data, software and certificates are included only when listed in the quotation.Features:
- Exact-model technical data for F121×04
- Applicable TESCH documentation
- Directory links by subcategory and brand
Documentation for F121×04 must be matched to the complete article identity and installed configuration before use.
Important notice
Manuals, software, firmware, cables, calibration data and accessories are included only when listed in the quotation. AMIKON is an independent supplier and is not affiliated with or authorised by the manufacturer.
This content has been produced using multiple sources. Takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
BUYER INFORMATION
Commercial terms without hidden steps
Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
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01
Shipping & delivery
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DispatchEligible stock: same / next day
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CarriersDHL, FedEx or UPS
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Ship fromXiamen, China
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Packed size11.4 × 9.9 × 4.5 cm
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Shipping weight0.37 kg
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Payment & customs
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PaymentBank transfer (T/T)
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CurrenciesUSD · EUR · GBP · RMB
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Credit cardsNot accepted
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HS reference85364900
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OriginGermany
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03
Warranty & returns
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Warranty12 months from AMIKON
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InspectionLabel, condition and packing checks
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ReturnsPrior RMA authorisation required
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CompatibilityConfirm before order
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OEM warrantyDoes not apply
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Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
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Part checked
Full suffix recorded -
Condition checked
Label and appearance -
Packing checked
Antistatic protection -
Tracking supplied
Established couriers -
Sandy Lin
Dedicated account manager · 15+ years
FREQUENTLY ASKED QUESTIONS
Questions buyers ask about F121×04
Direct answers about identity, compatibility, stock, warranty, payment and shipping.
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Which F121×04 supply version is being supplied?
Check the voltage printed on the relay label. The family has 230, 115 and 42 V AC and 24 V AC/DC variants; the supply circuit must match the particular unit. -
How many safety contacts does F121×04 provide?
The documented arrangement has three normally open safety contacts and one normally closed auxiliary contact. Check the terminal diagram against the installed wiring. -
Can its auxiliary contact replace a safety output?
No. The single normally closed contact is auxiliary; confirm that the required safety function uses the three designated safety contacts. -
What reset arrangement should maintenance record?
Record whether the installed circuit uses monitored or automatic reset and photograph the feedback-loop terminals before exchange. -
What is the function of Y31–Y32?
It is a semiconductor status output. Confirm its role in the existing indication circuit rather than treating it as another safety contact. -
Which safety category applies to this relay?
The documented relay is Category 4 with Stop Category 0 capability. The completed safety function still needs validation in the installed circuit. -
What evidence should a distributor request before quoting?
Request the complete F121×04 label, supply-voltage marking, terminal photograph and required contact arrangement. -
What should be tested after replacement?
Test the emergency-stop release, contact feedback, reset behavior and every connected guard function before restoring operation.
READY TO VERIFY YOUR PART?
Get a F121×04 quote with price, lead time and revision check.
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