Triconex 3721 32-Channel Analog Input Module For Tricon Systems
Introduction:
Triconex 3721 analog input module provides 32 differential DC inputs, 10ms update rate, 12/14-bit programmable resolution and 150VDC overrange protection for industrial safety systems.
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Product Attributes:
Manufacturer: Triconex
Series: Tricon
Part Number: 3721
Type: Analog Input Module
Condition: In Stock
Origin: U.S.A
Shipping Port: Xiamen
Warranty: one year
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Description
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Product Overview
The Triconex 3721 analog input module is built for high-reliability Tricon safety and control systems. It delivers stable and accurate analog signal measurement in demanding industrial environments. This module uses TMR architecture to maintain operation even under component fault conditions. It accepts 0 to 5 VDC or -5 to +5 VDC input signals with a small tolerance range of ±6%. Each unit includes 32 fully differential DC-coupled input channels for precise signal reading. The module supports both voltage inputs and 0–20mA current inputs with an external 250Ω shunt resistor. Its yellow color code helps technicians identify the module type quickly in cabinet installations. Built-in diagnostics allow real-time status monitoring for fast troubleshooting and system maintenance.
Technical Specifications
Input Configuration & Signal Ranges
The Triconex 3721 supports 0 to 5 VDC or -5 to +5 VDC input voltage with ±6% tolerance. It also accepts 0–20mA current signals when used with a 250Ω external shunt resistor. The module features 32 differential DC-coupled input points for improved noise immunity. All input points are isolated to support safe connection to field sensing devices. Common mode voltage range spans from -12V to +12V peak for industrial signal compatibility.
Resolution & Update Performance
This module offers programmable resolution of either 12 bits or 14 bits based on application needs. The input update rate is fixed at 10 ms for consistent and responsive data acquisition. Fast update speed ensures real-time monitoring of process variables in safety-critical applications. Programmable resolution lets users balance measurement detail and system performance as required.
Accuracy & Environmental Performance
Accuracy stays below 0.15% of full-scale range from 0°C to 60°C operating temperature. High accuracy maintains reliable measurement even in changing industrial temperature conditions. Input resistance measures a minimum of 10 MΩ at DC to minimize signal loading effects. Typical power-off resistance is 140 kΩ at DC for consistent circuit behavior in shutdown states.
Noise Rejection & Isolation
Common mode rejection reaches -85 dB from DC up to 100 Hz for strong interference filtering. Normal mode rejection is -3 dB at 23 Hz, -8 dB at 60 Hz and -14 dB at 120 Hz respectively. Leg-to-leg isolation resistance is typically 420 kΩ to protect circuits and improve safety. Strong rejection capabilities reduce signal distortion from nearby motors, drives and power lines.
Overrange Protection & Physical Data
The module provides continuous input overrange protection at 150 VDC or 115 VAC. This protection prevents damage from unexpected voltage spikes in field wiring systems. Total weight of the Triconex 3721 module is 1.36 Kg for easy handling and installation. Diagnostic LEDs show PASS, FAULT, ACTIVE and FIELD status for clear operational feedback.
Installation Guide
Begin installation by powering down the Tricon chassis to avoid electrical damage or hazards. Align the 3721 module with the correct slot and slide it firmly into the rack until seated. Ensure all locking mechanisms engage fully to secure the module in its operating position. Connect field wiring to the appropriate terminals following differential input polarity rules. Use proper shielding and grounding practices to reduce electrical noise in analog signal lines. If using current inputs, install a 250Ω shunt resistor across the desired input terminals. After wiring, restore power to the chassis and verify diagnostic indicators show normal status. Check input readings through the host system to confirm proper signal acquisition and operation.
Packaging List
The package includes one Triconex 3721 analog input module and standard terminal connectors. It also contains a physical installation guide and required mounting hardware for rack fitting. All components are packed in anti-static packaging to prevent damage during transit. External wiring accessories and shunt resistors are not included in the standard package.
Shipping Information
We ship the Triconex 3721 via reliable international carriers including FedEx, UPS and DHL. All orders are processed promptly to minimize lead time and ensure on-time delivery worldwide. Packages are fully protected against shock, vibration and electrostatic discharge during shipping. Tracking information is provided once the order is dispatched for full shipment visibility.
Frequently Asked Questions
What input types does the Triconex 3721 support?
The Triconex 3721 supports 0–5VDC or ±5VDC voltage and 0–20mA current with a 250Ω shunt. It uses 32 differential DC-coupled inputs suitable for most industrial analog sensors.
What resolution options are available on this module?
The module offers programmable resolution of 12 bits or 14 bits to match application requirements. Users can select the appropriate resolution during system configuration for desired precision.
What is the input update rate of the Triconex 3721?
The Triconex 3721 has a fixed input update rate of 10 ms for real-time process monitoring. This speed supports fast response in safety instrumented systems and critical control loops.
Does the module include overvoltage protection?
Yes, it provides continuous overrange protection at 150 VDC and 115 VAC for field wiring safety. This feature guards the module against wiring errors and transient voltage surges on site.
What diagnostic indicators are present on the module?
The module shows PASS, FAULT, ACTIVE and FIELD status lights for quick operational diagnosis. These indicators help maintenance staff identify faults and normal operating conditions easily.
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