Phoenix Contact PTTB 2 DINRail Terminal Block

Phoenix Contact DoubleLevel Pushin DINRail Terminal Block, Order No.: 3210567

Basic Information

Series: PTTB 2.5 (CLIPLINE complete PT Pushin Series)

Type: Doublelevel feedthrough terminal block, 2 independent potentials, 4 connection points (2 per level)

Connection Technology: Pushin toolfree connection. Solid conductors or stranded conductors with wire ferrules can be inserted directly. For bare stranded conductors, press the orange actuator lever before inserting wires.

Mounting: DIN rail NS35/7.5, NS35/15

Width: 5.2 mm, grey; Insulation material PA, UL94V0 flame retardant

Wire stripping length: 810 mm

Electrical Specifications

Key Features

1. Doublelevel independent circuits. Two signal/power circuits within one 5.2 mmwide unit, saving cabinet space. Frontside wiring for easy operation in confined cabinet spaces.
2. Builtin test jacks: test ports in doublefunction shaft plus extra external test connection. Multimeter probes can be applied without disconnecting wiring.
3. Certifications: UL, cULus, VDE, ATEX/IECEx for hazardous areas, DIN EN 455452 for railway, DNV marine certification. Suitable for railway equipment, machinery, process automation and explosive hazardous areas.
4. Part of CLIPLINE complete system, compatible with system jumpers, marker strips and end partitions.

Commercial Data

Order No.: 3210567

Standard packing: 50 pcs per pack

Unit weight: approx. 11 g

Domestic Equivalent Reference

Specifications: 5.2 mm doublelevel pushin terminal block, 2 electricallyisolated potentials, 0.144 mm², 22 A, DINrail mount

Inovance: ITB2.52D

Weidmüller: A2T 2.5

DINKLE: DK2.52P

Note: When replacing, verify currentcarrying capacity, stripping length, jumper compatibility and certifications for explosionproof / railway projects.

PTTB 2,53210567

Order No.: 3210567｜Product: Doublelevel electricallyisolated pushin DINrail terminal block｜CLIPLINE complete PT Pushin series

1. Mechanical Specifications

2. Electrical Specifications (IEC 6094771)

3. Builtin Functions & Accessory Compatibility
4. Dual test points: test ports in doublefunction shaft plus separate external test jacks. Multimeter probes can measure signals without wire disassembly.
5. System compatibility: fully interoperable with CLIPLINE complete system accessories: jumpers, end partitions, ZB marker strips, separator partitions.
6. Certifications: UL/cULus, VDE, IECEx, DIN EN455452 railway, DNV marine, RoHS.
7. Typical applications: cabinet I/O signal wiring, power distribution, railway equipment, process automation hazardousarea cabinets, marine equipment.
8. Comparison: PTTB 2.5 (3210567) vs PT2.5TWIN

Frequently confused doublelevel pushin terminal blocks

⚠️Selection Pitfall: Using TWIN (commonpotential) to substitute PTTB (isolated doublelevel) will result in shortcircuit upon poweron. Always verify potential relationship in projects.

5. Selection Notes for Domestic Replacements

Reference models: Inovance ITB2.52D; Weidmüller A2T2.5; DINKLE DK2.52P

Mandatory confirmation: doublelevel electrical isolation, NOT TWIN commonpotential type

Verify: conductor range 0.144 mm², 22 A rating, 5.2 mm width, test jacks, leveractuated operating structure

For railway / explosionproof projects: domestic substitutes must satisfy corresponding certification requirements; mechanical dimension match alone is not sufficient.

6. Installation & Maintenance Guidelines
7. Do NOT forceinsert bare stranded conductors without ferrules. Always depress the orange lever before inserting bare flexible wires, otherwise internal spring damage and excessive contact resistance with overheating risk may occur.
8. Jumpers shall only be applied within the same level. Crosslevel jumpering is prohibited; use dedicated jump wires for crosslevel connections.
9. Use standard 2.3 mm multimeter probes. Oversized probes may damage test jacks.

Application Scenarios of PTTB 2,53210567 (Doublelevel Isolated Pushin Terminal Block)

Core characteristics: 5.2 mm width, electricallyisolated two independent circuits, 4 connection points, Pushin toolfree wiring, builtin test jacks; 22 A / 500 V; certified for railway, ATEX/IECEx hazardousarea, marine DNV applications.

⚠️Reminder: It is NOT a TWIN commonpotential terminal. Upper and lower levels are electrically separated for two independent circuits, NOT for 1to2 branching.

1. Industrial Automation Control Cabinet (Most Common Use)
2. PLC I/O Signal Circuits

One single terminal block handles two DI/DO signals to save DINrail space. Upper level connects to PLC side; lower level connects to field sensors / actuators. Builtin test jacks allow multimeter measurement without disconnection during commissioning. Ideal for highdensity wiring in robot, packaging, injectionmolding and machinetool cabinets.

2. Two independent control power distribution

Within one unit: one channel for 24 V control power, the other for isolated signal power, preventing interference between different power circuits. Used for smallsize solenoid valves and indicator light loops.

3. Isolated inputoutput transfer

Two fullyisolated circuits for internal cabinet signal transfer, where signal grounds must be separated.

2. RollingStock & Railway Vehicles (Certificationcritical Application)

Qualified with DIN EN455452 railway fireprotection and EN50155 vibrationshock standards. Wide operating temperature 60 ~ +110 ℃, high vibration resistance.

1. Onboard cabinet: door control, airconditioning, lighting, passengerinformation systems. Compact cabinet requires highdensity wiring.
2. Locomotive / EMU control panels: transfer of two isolated signals and power circuits. Springclamp connection avoids screwloosening under vibration.

Prefer original Phoenix unit for railway projects. Domestic alternatives must pass firesafety and vibration certifications; mechanical dimension matching is insufficient.

3. Process Industry / HazardousArea Cabinets (ATEX/IECEx)
4. Chemical and pharmaceutical explosionproof cabinets: isolated transfer for intrinsicallysafe and nonintrinsicallysafe signals. Doublelevel isolation prevents crosscircuit interference, complying with hazardousarea wiring requirements.
5. Transmitter signal wiring: one channel for 420 mA analog signal, the other for isolated alarm loop. Saves cabinet installation space.
6. Marine & Offshore Equipment (DNV Marine Approval)

Control cabinets on vessels and deck enclosures. Vibrationresistant, widetemperature, humiditytolerant. Used for two independent signal / power circuit transfer.

5. Other Industrial Applications
6. Building Automation / HVAC Control Cabinets: DDC controller wiring for two independent sensor signals (temperature, humidity). Optimized for compact smallsize cabinets.
7. NewEnergy Equipment (Energystorage, smallscale PV cabinets): Lowvoltage controlloop wiring for isolated 24 V signal channels.
8. Testbenches & laboratory equipment: Two independent test circuits with convenient probeaccess test jacks to improve commissioning efficiency.

✅ Typical Correct Wiring Examples

1. Upper level: Circuit A (24V+ /24V); Lower level: Circuit B (separate isolated 24V+ /24V), circuits fully independent.
2. Upper level: DI input signal; Lower level: DO output signal, isolated signal transfer.

❌ Forbidden Practices

1. Do NOT use as PT2.5TWIN (commonpotential 1to2 splitter). PTTB upperlower levels are insulated with no internal continuity. For oneinputtwooutput branching, select Order No. 3211062.
2. Crosslevel jumpers are prohibited. Jumpers can only connect terminals on the same level.

Selection Guidance

Choose PTTB2.53210567: Two circuits require full electrical isolation.

Choose PT 2.5TWIN3211062: One signal to be branched into two outputs, upperlower levels internally connected.