7400221-100 Triconex PI2381 Datasheet & Technical Manual

Triconex 7400221-100 PI2381 Pulse Safety Input Module

Triconex 7400221-100 PI2381 Pulse Safety Input Module

Availability: 10 left in stock

Triconex 7400221-100 PI2381 Pulse Input Baseplate Configured for high-reliability frequency acquisition in Safety Instrumented Systems (SIS), the Triconex 7400221-100, also...

SKU: PI2381 7400221-100

Manufacturer: Triconex
Product No.: PI2381 7400221-100
Product Type: Pulse Input Modules
Product Origin: USA
Payment:T/T, Western Union
Weight: 500g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Triconex 7400221-100 PI2381 Pulse Input Baseplate

Configured for high-reliability frequency acquisition in Safety Instrumented Systems (SIS), the Triconex 7400221-100, also cataloged as the PI2381 Pulse Input Baseplate, provides direct physical/electrical execution. The hardware serves as the primary interface executing sensor pulse conversion into digital frequency and rotational speed data for downstream processing. It acts as an isolated signal conditioning plane operating under a Triple Modular Redundant (TMR) processing framework to manage high-velocity field telemetry.

Hardware Specifications

Parameter	Specification
Model	7400221-100 PI2381
Brand	Triconex
Origin	China
Weight	0.5 kg
Dimensions	122 x 87 x 90 mm
Operating Temp	-40 to +70 deg C
Storage Temp	-40 to +85 deg C
Humidity	5% to 95% non-condensing
Channels	6 isolated input channels
Sensor Compatibility	Magnetic pickups, active sensors, open-collector outputs
Input Voltage Range	Up to +/-33 VDC maximum
Minimum Input Voltage	0.5 to 1 V P-P depending on frequency
Input Frequency Range	0.5 Hz to 32 kHz
Speed Range	0 to 32,000 RPM
Resolution	24-bit
Accuracy	+/-0.01% (2,000 to 32,000 Hz), +/-0.1% (0.5 to 2,000 Hz)
Isolation	Greater than or equal to 500 VDC channel-to-earth
Gear Teeth Supported	1 to 255
Hot-Swappable	Yes
Certifications	IEC 61508 SIL 3, TUV

Triple Modular Redundant Safety Control

The architecture utilizes a triple modular redundancy (TMR) 2oo3 architecture to eliminate single-point failures across critical execution loops. Three isolated hardware branches simultaneously execute continuous internal diagnostics and fault detection on incoming pulses. Hardware channels route through a dedicated mid-value selection algorithm to reconcile discrepancies across the independent processing paths. Galvanic isolation measures equal to or exceeding 500 VDC safeguard internal processing logic against external field transients, enforcing a predictive fail-safe state execution should input values degrade beyond operational setpoints.

Frequently Asked Questions

Q: Does the hot-swap functionality pose a threat of spurious trip execution to the active 2oo3 voting network?

A: No. The hot-swappable architecture allows online module replacement without halting system operations. The internal mid-value selection logic isolates the slot under replacement, maintaining system integrity via the remaining redundant channels during the replacement window.

Q: What are the input electrical limits required to maintain standard 24-bit resolution accuracy at lower frequency ranges?

A: The minimum input amplitude ranges from 0.5 V to 1 V Peak-to-Peak (P-P). Frequencies below 2,000 Hz operate at an accuracy of +/-0.1%, while high-frequency operations between 2,000 Hz and 32 kHz achieve +/-0.01% accuracy.

Field Installation Guidelines

Chassis Grounding and Isolation Compliance: Ensure the baseplate DIN-rail mounting or panel assembly connects directly to a low-impedance instrument ground plane. Channel-to-earth isolation boundaries must maintain a minimum threshold of 500 VDC.
Shield Interconnection Rules: Run field wiring for magnetic pickups or active pulse sensors via twisted, shielded pairs. Terminate the shields strictly at the designated baseplate ground terminals. Never loop ground shields back to the field sensor housing to prevent parasitic ground loops.
Terminal Wiring Mechanical Constraints: Secure field connections using standard commercial instrumentation practices. Ensure a minimum thread engagement for terminal screws to avoid vibration-induced signaling faults. Maintain physical separation between low-voltage pulse input cables and high-voltage AC distribution paths.

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