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PRODUCT DESCRIPTION
1797-TB3 Intrinsically Safe Screw Terminal Base
Allen-Bradley 1797-TB3 is a screw-terminal base for the FLEX Ex intrinsically safe distributed I/O system. It provides the physical wiring and module connection interface for compatible 1797 I/O modules used in hazardous-area process automation.
The base has a keyed module location, screw-cage field connections and a Flexbus connection. Its documented terminal layout comprises one row of 16 and two rows of 18, with terminal assignments determined by the inserted I/O module. It is distinct from the 1797-TB3S spring-clamp version.
The base has a keyed module location, screw-cage field connections and a Flexbus connection. Its documented terminal layout comprises one row of 16 and two rows of 18, with terminal assignments determined by the inserted I/O module. It is distinct from the 1797-TB3S spring-clamp version.
BEFORE YOU BUY
Confirm the complete intrinsically safe screw terminal base
ACTUAL APPLICATIONS
Application context for 1797-TB3
1797-TB3 connects compatible FLEX Ex I/O modules to process field wiring. Such systems support chemical processing, oil and gas, and pharmaceutical manufacturing. The inserted module defines the signal assignments; the complete installation must meet the applicable intrinsic-safety and certification conditions.
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01 · CHEMICAL PROCESSING
Chemical Production and Process Manufacturing
Industrial Chemical ProductionPetrochemical Production and Processing -
02 · OIL & GAS
Oil Refining and Natural Gas Processing
Petroleum Refining and ProcessingNatural Gas Processing -
03 · PHARMACEUTICALS
Pharmaceutical and Biopharmaceutical Production
Pharmaceutical Ingredient ManufacturingBiopharmaceutical Process Production
Technical specifications for 1797-TB3
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Product Model1797-TB3
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Product ParametersIntrinsically Safe Screw Terminal Base
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In stock4 units
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ManufacturerAllen-Bradley
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Terminal arrangement1 row of 16 + 2 rows of 18
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Terminal connection typeScrew-cage
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Terminal screw torque0.8 to 1.0 Nm
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Maximum stranded conductor cross-section4 mm² (12 AWG)
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Maximum conductor insulation diameter1.2 mm
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Operating temperature-20 to +70 ℃
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Storage temperature-40 to +85 ℃
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Relative humidity5 to 95%, non-condensing
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Shock test15 g peak, 11 ±1 ms pulse
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Vibration test2 g at 10 to 500 Hz
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Flexbus intrinsic-safety voltage limitUi <10 V DC
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Flexbus intrinsic-safety current limitIi <400 mA
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IECEx certificate referenceBVS 08.0006X
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ATEX certificate referenceDMT 98 ATEX E012 U
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IECEx marking in manufacturer referenceEx ia IIC T4 Gb
View all additional
Alternative Names
1797-TB3
FLEX Ex Intrinsically Safe Screw Terminal Base
1797 intrinsically safe terminal base
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 1797-TB3 intrinsically safe screw terminal base
1797-TB3 is the screw-terminal base for compatible FLEX Ex I/O modules. Match the inserted module and keying position before assigning field wiring.
Use the module-specific terminal diagram and intrinsic-safety assessment. The base has one row of 16 and two rows of 18 terminals; the manufacturer specifies 0.8–1.0 Nm terminal torque.
Check Flexbus continuity, mounting, conductor connections and the applicable certification marks. Use the complete Rockwell system instructions before energizing field circuits.
Features:
- Module-specific terminal assignments and keyed position
- Screw-cage wiring with 0.8–1.0 Nm terminal torque
- FLEX Ex intrinsic-safety system interfaces
The 1797-TB3 intrinsically safe screw terminal base requires appropriate configuration before system integration and commissioning.
INTERCHANGEABILITY
Verify 1797-TB3 intrinsically safe screw terminal base
Compare the 1797-TB3 identity with the installed screw-terminal base. The TB3S spring-clamp construction is a different variant.
Record the I/O module identity, keyed position, terminal assignments and hazardous-area markings. Keep field-circuit segregation and the approved wiring arrangement.
After exchange, verify secure conductors, Flexbus contacts and each module signal. Confirm the correct module configuration and intrinsic-safety documentation before service.
Features:
- 1797-TB3 screw version versus TB3S spring version
- Preserved I/O module keying and field wiring
- Flexbus contact, latch and certification marking inspection
The 1797-TB3 intrinsically safe screw terminal base requires replacement verification against the complete installed configuration and current manufacturer documentation.
DOCUMENTATION STATUS
Browse the Manuals, Datasheets, Official Documents, Links
Important Notice: The linked files are Amikong-hosted reference documents. Match their product identity and scope to the supplied assembly, and consult the applicable manufacturer instructions before use. Accessories and additional documents are included only when expressly listed in the quotation.Features:
- 1797-IN001G terminal-base specifications
- IECEx and ATEX certificate references
- Module-dependent isolation and conductor limits
Documentation for the 1797-TB3 intrinsically safe screw terminal base must be checked for document applicability before installation or commissioning.
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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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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 size9.6 × 9.6 × 5.8cm
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Shipping weight0.25kg
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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 reference8538900000
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OriginUSA
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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 1797-TB3
Direct answers about identity, compatibility, stock, warranty, payment and shipping.
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Is 1797-TB3 an active I/O module?
No. It is the terminal-base interface for a compatible FLEX Ex I/O module. The inserted module determines the signals and terminal assignments. -
How does TB3 differ from TB3S?
1797-TB3 uses screw-cage connections; 1797-TB3S uses spring-clamp terminals. Match the existing wiring and documented module compatibility. -
What tightening torque is specified for TB3 screws?
Rockwell specifies 0.8–1.0 Nm for 1797-TB3 terminal screws. Use the correct conductor and the complete manufacturer wiring instructions. -
What conductor cross-section is permitted in the terminal base?
The documented maximum is 4 mm² (12 AWG) stranded conductor, with 1.2 mm maximum insulation diameter as stated in the reference. -
Does this base establish channel-to-channel isolation?
The inserted I/O module determines channel-to-channel isolation. Do not infer an isolation rating from the terminal base alone. -
What operating environment is documented for the TB3 base?
The reference lists -20 to +70 ℃ operation and 5–95% non-condensing humidity. Hazardous-area use also requires the applicable complete-system conditions. -
What should a TB3 replacement inquiry include?
Provide 1797-TB3, the inserted I/O module number, certification markings, wiring photographs, quantity and destination. -
What physical checks should be made on the spare base?
Inspect screw terminals, the module keying switch, latch and Flexbus contacts. Compare the exact base type and module position before connection.
READY TO VERIFY YOUR PART?
Get a 1797-TB3 quote with price, lead time and revision check.
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