Product Description
The Triconex 3503 is a 32-channel high-density digital input (DI) module for the Tricon Triple Modular Redundancy (TMR) system. Designed for SIL 3 Safety Instrumented Systems (SIS), it continuously monitors field-state conditions with fault-tolerant TMR voting and integrated diagnostics, ensuring no single failure compromises safety.
Key Features
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32 digital input channels, TMR 2-out-of-3 voting
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Nominal 24 VDC operation (15–30 VDC range)
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Forced Value Diagnostics (FVD) for real-time path verification
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Hot-spare capable for online replacement
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<10 ms signal switching delay (On/Off)
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Low current consumption (<1 mA per point)
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Industrial-grade -40°C to +70°C operation, IP54 protection
Technical Specifications
| Parameter | Specification |
|---|---|
| Input Channels | 32 |
| Redundancy | TMR, 2oo3 voting |
| Voltage Range | 15–30 VDC nominal 24 VDC |
| Input Impedance | ~3 kΩ installed, >30 kΩ standalone |
| Signal Delay | <10 ms On/Off |
| Diagnostics | Forced Value Diagnostics (FVD) |
| Current per Input | <1 mA |
| Temperature | -40°C to +70°C |
| Storage | -55°C to +85°C |
| Ingress Protection | IP54 |
| Dimensions | 12.5 × 17 × 14.2 cm |
| Weight | 1.42 kg |
Applications
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Monitoring E-Stop pushbuttons
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Limit switch and valve position monitoring
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Flame detector and gas sensor status acquisition
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Pressure/level switch integration in SIL 3 loops
FAQ
Q: Does the 3503 support hot-swapping?
A: Yes, it can be replaced online using the adjacent baseplate slot without interrupting the process.
Q: How does Forced Value Diagnostics (FVD) work?
A: The module briefly forces the input circuit to a known state. If the returned signal doesn’t match, a fault is immediately flagged.
| Quick Quotes | Receive price & availability FAST from our dedicated customer service team. |
|---|---|
| Delivery | Expedited, Freight, And International Shipping Available. |
| Condition | 100% New with Original Package |
| Payment | We accept American Express, Discover, MasterCard, PayPal, and Visa. Our site is secured by RapidSSL. |
| Shipping Port | ShangHai, Xiamen |
| Warranty | 12 Months |
| Q: Is Our Pricing Competitive? |
| A: Yes, we collaborate with over 50 countries worldwide. As a top supplier in China, we offer significant discounts based on market trends. |
| Q: What Is the Warranty Period? |
| A: All our new and original products come with a standard one-year warranty. |
| Q: What Payment Methods Do We Accept? |
| A: We require 100% T/T (Telegraphic Transfer) payment before shipping. For items with a lead time, a 30% deposit is needed upfront, and the remaining 70% is due before shipping. If you have a representative in China, you can arrange an RMB transfer through them. |
| Q: What Shipping Methods Do We Use? |
| A: We primarily use FedEx, DHL, UPS, and BRE for shipping. If you have an account with any of these carriers, you can handle shipping directly. We also offer free shipping to China-based freight forwarders. |
| Q: What Is Our Delivery Time? |
| A: Delivery usually takes 1-3 days after receiving the initial payment. For items with a lead time, shipping will occur according to the specified schedule. |
| Q: How Do We Package the Goods? |
| A: We ensure safe packaging with multiple layers of protection. Products are first placed in their original boxes and sealed with labels. A layer of bubble wrap is then added for collision protection during transit. Finally, the items are packed securely in durable boxes. |
| Q: How Can Customers Contact Us and Request a Quote? |
| A: You can reach out to us via email, WhatsApp, WeChat, Skype, or your preferred communication platform. Contact us with your needs, and we'll provide a prompt, customized quote. |
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