Product Details
Configured for high-integrity digital signal acquisition in safety-critical ESD and Fire & Gas networks, the ICS Triplex T8403, also cataloged as the T8403 TMR 24 Vdc Digital Input Module, provides direct physical/electrical execution. The hardware operates across 40 isolated input channels designed for fault-tolerant operation without channel-to-channel isolation.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | T8403 |
| Brand | ICS Triplex |
| Origin | United Kingdom |
| Weight | 1.18 kg (2.6 lb) |
| Dimensions | 266 mm x 31 mm x 303 mm (10.5 in x 1.2 in x 12.0 in) |
| Operating Temp | 0 deg C to +60 deg C |
| Power Consumption | 20 W (Backplane) / 29 W Max Dissipation |
| Input Voltage Range | -6 VDC to +36 VDC |
| Input Channels | 40 Channels |
| Input Impedance | 5 kOhm |
| Backplane Supply Voltage | 20 VDC to 32 VDC |
| Isolation Voltage | 50 V Reinforced continuous / 250 V Basic fault / 2436 VDC test |
| Safety Accuracy | 0.5 VDC |
| SOE Resolution | 1 ms |
| Timestamp Accuracy | +/-10 ms |
High-Reliability Safety Control & TMR Architecture
The T8403 module utilizes a triple modular redundancy (TMR) 2oo3 architecture to achieve SIL3 certification in safety-instrumented applications. Internal voter circuits perform majority voting on incoming digital input signals to prevent single-point hardware failures from triggering false trips or inhibiting safety functions. Galvanic isolation rated at 50 V reinforced continuous insulation isolates the field commons from the system inter-module bus (IMB), ensuring fail-safe state execution under severe electrical transients or ground potential variations.
Frequently Asked Questions
Q: What is the isolation threshold between field inputs and system backplane circuits?
A: The module features 50 V continuous reinforced isolation and 250 V basic fault isolation between field commons and system circuits, type-tested at 2436 VDC for 60 seconds.
Q: Does the T8403 module require external fuses or intrinsic safety barriers for hazardous areas?
A: The T8403 contains no internal channel fusing. For hazardous location field loops requiring intrinsic safety protection, external Ex-i barriers must be installed separately in series with field wiring.
Field Installation Guidelines
- Power off the system rack slot or follow hot-swap maintenance procedure limits prior to module insertion into the T8100 or T8300 I/O chassis slot.
- Verify field cable signal lines do not exceed the max continuous withstanding limit of +/-50 VDC prior to connecting terminal blocks.
- Connect signal cable shielding to designated ground bars using short, high-frequency grounding straps to prevent noise coupling on 1 ms Sequence of Events (SOE) timestamp channels.
- Maintain a minimum bending radius on field wiring harnesses to eliminate physical strain on the front connector interface.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
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