Description
- Model & Brand: T8842 | ICS Triplex
- Series: Trusted
- Part Type: Trusted Versatile Field Termination Assembly (VFTA)
- Core System: Trusted TMR control system
- Channel Capacity: 40 field channels
- Physical Dimensions: Approx. 360 W × 110 H × 68 D mm (14.2 × 4.3 × 2.6 in)
- Estimated Net Weight: Approx. 0.95 kg fully populated
- Estimated Shipping Weight: Approx. 1.3–1.8 kg, depending on protective packaging and installed accessories
- What’s in the Box: T8842 VFTA assembly; protective ESD packaging; fuses/links only when included with the specific unit; mating cables or field connectors only when stated in the PO
- Power Groups: 5 groups × 8 channels
- Field Connections: 40 × 3-way field-loop connectors; five 10-way module-side connectors; five 4-way power connectors
Product Introduction
In a Trusted installation, the T8842 is the physical termination layer between the field and the safety-system I/O hardware. The ICS Triplex T8842 Trusted Versatile FTA provides termination for up to 40 input or output channels, with channel circuits configurable for different analog and digital field-device arrangements. The assembly is divided into five independent power groups of eight channels, allowing the same hardware platform to accommodate multiple field-interface requirements within one cabinet assembly.
The T8842 is not a CPU, I/O processor, or standalone safety controller. It works with compatible Trusted modules and uses plug-in fuses, links, resistors, and dedicated connectors to condition and distribute field signals. For example, each channel includes a 250 Ω, 7 W resistor for short-circuit current limiting and a precision 250 Ω, 0.25 W, 0.1% resistor for analog current measurement. That makes exact channel configuration a procurement issue, not just a cabinet-fit issue (especially when replacing a populated VFTA during a shutdown).
Core Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | ICS Triplex / Rockwell Automation |
| Model | T8842 |
| Series | Trusted |
| Product Type | Trusted Versatile FTA |
| Functional Role | Field termination and signal-conditioning assembly |
| Maximum Channels | 40 |
| Channel Groups | 5 power groups × 8 channels |
| Supported Field Signals | Analog 0–20 mA and digital signals, depending on configuration |
| Field Loop Connectors | 40 × 3-way |
| Module-Side Connectors | 5 × 10-way |
| Power Connectors | 5 × 4-way |
| Analog Input Resistor | 250 Ω, 0.25 W, 0.1% |
| Short-Circuit Limiting Resistor | 250 Ω, 7 W, 1% |
| Typical Recommended Channel Current | 220 mA per channel |
| Field Supply Voltage Range | 18–28 VDC |
| Maximum Field-Supply Current | 2.52 A per power group |
| Maximum Power Consumption | 9 W |
| Signal Input Range | 0–20 mA |
| Fuses | 50 mA, 315 mA, and 2 A plug-in types |
| Dimensions | 360 × 110 × 68 mm |
| Fully Populated Weight | Approx. 950 g |
| Operating Temperature | -5 to +60 °C |
| Operating Humidity | 5–95% RH, non-condensing |
| Vibration | 10–57 Hz: ±0.075 mm; 57–150 Hz: 1.0 g |
| Shock | 15 g, 11 ms half-sine |
| ESD Test | 15 kV air / 8 kV contact |
| Radiated Immunity | 10 V/m, 27–500 MHz |
| Burst/Transient Test | 2 kV, 2.5 kHz |
| Firmware | None in the VFTA itself |
The manufacturer documentation identifies as a 40-channel Trusted Versatile FTA and specifies the electrical, mechanical, environmental, and connector characteristics above.
ICS Triplex T8842
🚨 Global Compliance & Industry Certifications
The is an internal termination assembly for the Trusted safety-control architecture. Certification must therefore be evaluated against the complete installed Trusted system, cabinet, barriers, power arrangement, and field installation.
- CE Mark: Applicable compliance may exist at the Trusted system/equipment level; do not assume a standalone CE declaration for every assembly.
- UL/cUL: No standalone UL/cUL certificate was established from the manufacturer records reviewed.
- ATEX: No standalone ATEX certificate was established from the reviewed records.
- IECEx: No standalone IECEx certificate was established.
- Marine Approvals: No -specific DNV, ABS, or Lloyd’s Register approval was established.
- EMC: The technical specification includes ESD, radiated-immunity, and transient/burst test criteria.
- Hazardous-Area Considerations: The final suitability depends on the selected fuse/link arrangement, field wiring, barriers, enclosure, and the connected Trusted I/O hardware.
For plant compliance, the important point is that is a field termination assembly, not the complete safety function. A replacement must maintain the approved system architecture, including the proper fusing and channel configuration.
Verify specific lot certifications with OEM.
🚨 Long-Term Storage & Asset Preservation Guide
Keep the clean, dry, and mechanically protected. Unlike a simple cable assembly, the VFTA contains numerous resistors, connectors, fuse holders, links, and exposed interface points. Dust and oxidation around these points can produce high-resistance connections or intermittent field faults.
Store unused fuses and links with the unit only when their ratings are verified. The supports 50 mA, 315 mA, and 2 A plug-in protective devices, and those values are part of the field-interface design. A warehouse substitution with a visually similar fuse can change the protection characteristics of the channel.
Control humidity. The specified operating environment permits 5–95% RH non-condensing, but long-term warehouse preservation should be more conservative. A practical target below 60% RH reduces oxidation risk around connectors, fuse clips, and exposed metal hardware.
Record the channel configuration before shelving. Photograph the fuse/link positions, connector arrangement, and any configured channel groups. The VFTA is configurable, and losing the original arrangement can turn a simple spare replacement into a full field-retermination exercise. (That is an avoidable shutdown cost.)
Physical Installation Prerequisites
is a field termination assembly, not a DIN-rail electronic controller. Its physical installation must match the associated Trusted module, SmartSlot cable, and field termination architecture.
Before installation:
- Confirm the host system uses the Trusted VFTA architecture.
- Verify the exact part identity before removal of the existing assembly.
- Check the rack/module-side cable arrangement; the is connected to Trusted hardware through dedicated multi-pin interfaces.
- Verify the 40 field channels against the approved wiring schedule.
- Confirm the five power-group assignments before reconnecting field power.
- Inspect all 3-way field connectors and module-side connectors for bent, recessed, oxidized, or contaminated contacts.
- Match every fuse and link to the approved channel configuration.
- Confirm field supply voltage is within 18–28 VDC before energization.
- Verify protective-earth and cabinet grounding according to the Trusted installation drawings.
- Maintain cable separation between low-level analog signals and high-energy switching circuits where the cabinet layout permits.
- Do not impose a generic 50 mm clearance around the assembly. Use the actual Trusted cabinet ventilation and service-access requirements.
- Confirm adequate access for fuse replacement and field-terminal inspection.
- Use ESD controls when handling the module-side electronics and connectors.
- After reconnection, perform point-to-point verification before returning field loops to service.
For applications using the with the T8480 analog output module, Rockwell documentation specifies a dedicated SmartSlot cable arrangement for the VFTA interface.
Buyer’s FAQ
Q1. What HS tariff code should be used for ICS Triplex ?
A: Do not assign a final tariff code from “field termination assembly” alone. Because is a dedicated industrial electrical interface assembly, HS heading 8538 may be considered when classified as a part suitable for electrical control equipment. The final country-specific classification should be confirmed by the importer or customs broker.
Q2. Does Country of Origin mean the country where the supplier stores the ?
A: No. COO relates to the applicable origin rules for the physical product, not the warehouse location. For audit purposes, retain the actual unit identification, manufacturer or supplier origin declaration, commercial invoice, and Certificate of Origin when required.
Q3. How should be packed for international freight?
A: Protect the assembly from moisture and impact, place exposed connectors under protective covers, immobilize the unit inside a rigid carton, and protect the fuse holders and field connectors from point loading. The documented fully populated weight is about 950 g, but actual shipment weight will depend on installed accessories and packaging. Cargo insurance should cover the declared replacement value for a critical spare.
Q4. Does include the latest firmware pre-loaded?
A: No. is a versatile field termination assembly, not a processor or intelligent I/O module. There is no conventional application firmware to preload. Compatibility depends on the associated Trusted module, cable type, fuse/link configuration, and field wiring arrangement.
Q5. Can be hot-swapped?
A: Do not treat it as a generic hot-plug assembly. The carries field power and signal terminations, and the correct maintenance procedure depends on the connected Trusted I/O architecture. Isolate the relevant field circuits according to the approved site procedure, verify the power-group state, document every fuse/link and cable position, then perform channel verification before returning the system to operation.
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