Triconex 5351S2 32 channel digital input DI module

Triconex 5351S2 32 channel digital input DI module (TriPak old generation Tricon SIS system)

1、 Basic Core Information
Model: 5351S2
Brand: Triconex (formerly Invensys under Schneider)
Adaptation system: TriPak old-fashioned Tricon safety instrument system, mixed with 5301S2, 5401S2, 5481-1S2 in the same rack
Category: TMR Triple Redundant 32 Channel Digital Input Card
Origin: United States USA
Safety certification: T Ü V IEC61508 SIL3, meets ESD and turbine interlocking standards
Architecture: Three independent hardware channels with 2oo3 hardware voting, supporting online hot plugging, single channel failure does not trigger system trip and shutdown

2、 Complete electrical parameters
Channel specifications
Total number of channels: 32 isolated digital inputs
Standard adaptation signal: 24VDC dry contact, wet contact (valve position feedback, emergency stop, pressure/level switch, flame probe)
Level threshold: ON ≥ 15VDC, OFF ≤ 5VDC
Single channel input impedance: approximately 3k Ω
Response speed: OFF → ON ＜ 3ms, ON → OFF ＜ 2ms
Isolation and Diagnosis
On site circuit ↔ Backplane bus: 2500VAC optoelectronic isolation
Full circuit diagnosis: single channel disconnection, ground/power short circuit, triple redundant channel cross check self-test
Panel independent LED indicator light, real-time upload of faults to TriStation software
Power Supply and Environment
Power supply: The rack backplane is powered by 5V DC, with a full load power consumption of approximately 6.3W
Working temperature: -40 ℃~+70 ℃; Storage temperature: -40 ℃~+85 ℃
Humidity: 5% to 95% without condensation
Size: Standard 3U TriPak card, net weight approximately 1.2kg
3、 Shutdown status (critical for procurement)
Original factory officially discontinued EOP: 2017
The production line of TriPak’s entire series of I/O cards (5351S2, 5301S2, 5401S2, 5481 series) is synchronously stopped;
Original factory inventory clearance period: 2017-2020. After 2020, Schneider’s original factory did not release any new complete machines;
Market supply: Only a small amount of inventory of new machines, second-hand dismantled machines, and third-party refurbished repair parts, making it impossible to place new orders with the original factory;
Original factory maintenance policy: In 2022, the original factory board level maintenance channel will be closed, and the supply of acquisition chips and optocouplers will gradually be cut off. Only third-party industrial control vendors can perform board level repairs.

4、 Comparison with TriPak series DI cards (5351S2 vs 5481-1S2)
Comparison item 5351S2 5481-1S2
Module type 32 channel digital input DI 32 channel analog input AI
Collect 24V switch signal, dry/wet contact 0-5V analog transmitter signal
Usage: Collect emergency stop, valve feedback, safety switch, collect pressure/temperature/liquid level simulation process values
Rack compatibility TriPak universal slot for old racks TriPak can be mixed and inserted in the same rack, but the functions are not interchangeable
Production stoppage time: synchronous shutdown in 2017
5、 Alternative solutions
Short term emergency: Only stock the same model 5351S2 for direct replacement, with fully compatible wiring and configuration;
Long term system upgrade: The entire machine is upgraded to the Trident new generation platform, using 3201 (24V DI) and 3211S2 universal DI cards, which require synchronous rack replacement CPU、 Rewrite the security logic program.