Product Details
Configured for high-integrity discrete load switching in safety-critical ESD and shutdown systems, the ICS Triplex T8451 (T8451 Digital Output Module) provides direct physical/electrical execution. The module drives up to 40 field-side channels partitioned into 5 independent power groups over an operational voltage range of 18 VDC to 32 VDC.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | T8451 |
| Brand | ICS Triplex |
| Origin | United Kingdom |
| Weight | 1.13 kg (Shipping Weight: 3.0 kg) |
| Dimensions | 300 mm x 30 mm x 241 mm (11.8 in x 1.2 in x 9.5 in) |
| Operating Temp | -5 deg C to +60 deg C (+23 deg F to +140 deg F) |
| Power Consumption | 24 W (System Supply) / 24 W (Field Supply @ 1 A/ch) |
| System Supply Voltage | 20 VDC to 32 VDC |
| Operational Field Voltage | 18 VDC to 32 VDC (Max Withstanding: -1 VDC to +40 VDC) |
| Output Channels | 40 Channels (5 Power Groups of 8 outputs) |
| Continuous Current Rating | 2 A per channel (Max 8 A per power group) |
| Minimum On-State Load | 50 mA |
| On-State Resistance | 0.6 Ohm |
| Output Turn-On/Off Delay | 0.5 ms |
| Sample Update Time | 0.5 ms |
| Field Common Isolation | +/-250 VDC Sustained Working / +/-2.5 kVDC Max Withstanding |
| Operating Humidity | 5% to 95% RH non-condensing |
High-Reliability Safety Control & TMR Architecture
The T8451 incorporates a triple modular redundancy (TMR) 2oo3 fault-tolerant architecture to achieve SIL3 certification within high-availability safety execution loops. Triplicated output channels utilize internal voter circuits and automatic electronic latching short-circuit protection to maintain continuous fail-safe state execution without dropping active control loops. Field-common galvanic isolation rated at +/-250 VDC sustained working voltage suppresses cross-talk and ground potential shifts, ensuring process field outputs execute deterministic shutoff logic during system fault events.
Frequently Asked Questions
Q: What are the current distribution limits per channel and per power group on the T8451 module?
A: Each individual output channel supports a maximum continuous load of 2 A, with the total combined load capped at 8 A per power group across the 5 independent output groups.
Q: How does the T8451 respond to an overcurrent or output short-circuit condition?
A: The module features automatic, electronic latching short-circuit protection that isolates the faulted channel to protect output switching hardware and surrounding control circuitry.
Q: Is external isolation required for installation of the T8451 in hazardous location field loops?
A: Yes. The module does not contain built-in intrinsic safety barriers; external Ex-i barriers must be wired in series with field loops requiring intrinsic safety protection.
Field Installation Guidelines
- Isolate field power and verify the 18 VDC to 32 VDC field voltage source before inserting the module into the active chassis slot.
- Ensure field load currents remain above the 50 mA minimum on-state threshold to maintain valid channel diagnostic state sensing.
- Route field output cables away from high-voltage AC lines to maintain channel-to-channel crosstalk suppression better than -40 dB.
- Securely seat the module retaining hardware into the rack frame to guarantee low-impedance frame grounding and continuous +/-2.5 kVDC isolation withstand capability.
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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