Product Name:Analog Input Module
Brand Name: TRICONEX
Model Number:3700A
Country of Origin:USA
Warranty: 12 Months
Whatsapp：+86 18159889985
Email：[email protected]
Brand Name: |
TRICONEX |
Model Number: |
3700A |
Country of Origin: |
USA |
Packaging Details: |
Original new Factory Sealed |
Delivery Time: |
Delivery time in stock |
Payment Terms: |
T/T |
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Sales Manager: |
Stella |
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Send an email: |
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Contact in Whatsapp: |
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Parameter |
Specification |
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Model |
3700A |
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Manufacturer |
Triconex (Schneider Electric / Invensys) |
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Product Type |
TMR Analog Input Module |
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Architecture |
Triple Modular Redundant (TMR), 2oo3 voting |
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Number of Input Points |
32, differential, DC-coupled |
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Input Voltage Range |
0–5 VDC (+6% over-range, up to 5.3 VDC) |
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Input Resistance (load) |
30 MΩ (DC), minimum |
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Power-Off Resistance |
30 kΩ (DC), typical |
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Resolution |
12 bits |
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Accuracy |
<0.15% of FSR, from 0°C to 60°C |
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Input Update Rate |
55 ms |
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Common Mode Rejection |
–80 dB (DC–100 Hz), typical |
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Common Mode Range |
–12V to +12V peak |
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Normal Mode Rejection |
–3 dB @ 8Hz; –17 dB @ 60Hz; –23 dB @ 120Hz |
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Leg-to-Leg Isolation |
200 kΩ, typical |
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Input Overrange Protection |
150 VDC / 115 VAC continuous |
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Current Range |
0–20 mA (with external 250 Ω shunt resistor) |
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Logic Power |
<10 W |
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Color Code |
Yellow |
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Status Indicators |
Pass, Fault, Active |
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Hot-Spare Capability |
Yes |
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Safety Rating |
SIL 3 (IEC 61508) |
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Operating Temperature |
0°C to 60°C |
The 3700A is a high-density TMR analog input module from Triconex, engineered for the Tricon Safety Instrumented System (SIS) platform. The 3700A provides 32 differential, DC-coupled input channels, converting 0–5 VDC signals into 12-bit digital values for the three Main Processor modules. With a 55 ms update rate and <0.15% FSR accuracy, the 3700A delivers reliable analog signal acquisition for safety-critical applications. The 3700A sustains continuous per-channel diagnostics and supports hot‑spare capability for online module replacement, making it ideal for demanding industrial environments.
Analog Signal Acquisition – Captures variable voltage signals (0–5 VDC) from 32 field input points and converts them to digital values
TMR Redundant Processing – Three independent input channels process each signal; a mid-value selection algorithm ensures correct data for every scan
Channel Isolation Protection – Sensing is performed to prevent a single failure on one channel from affecting another
Continuous Diagnostics – Per-channel diagnostics detect faults and activate the module Fault indicator and chassis alarm
Hot‑Spare Replacement – Supports online replacement of a faulty module without system shutdown
External Termination Panel Interface – Connects to the Tricon backplane via a separate external termination panel (ETP) with cable interface
Fault-Tolerant Operation – TMR architecture with 2-out-of-3 voting ensures the module operates correctly even with up to two faulty channels; a single channel failure does not affect system performance
High Precision Signal Acquisition – 12-bit resolution with <0.15% FSR accuracy over 0°C to 60°C delivers reliable measurements for safety-critical monitoring
Superior Noise Immunity – –80 dB common mode rejection and differential inputs effectively reject electromagnetic interference in harsh industrial environments
Reduced Downtime – Hot-spare capability allows online module replacement, minimizing process interruption
Comprehensive Diagnostic Coverage – Continuous per-channel diagnostics with Pass, Fault, and Active status indicators enable rapid fault identification and maintenance
High Channel Density – 32 inputs per module maximize I/O capacity while minimizing chassis space requirements
Refinery Emergency Shutdown (ESD) – Monitoring critical analog inputs for reliable trip logic and event logging in fire and gas systems
Chemical Plant Process Control – Temperature monitoring and safety interlocks for reactors and heaters, requiring high accuracy and fast fault detection
Power Generation Turbine Systems – Vibration and pressure sensor feedback for turbine monitoring and safety controller integration
Offshore Gas Platform Safety – Valve position and flow meter analog readings in harsh maritime environments
Oil & Gas Pipeline Monitoring – Continuous process variable monitoring (pressure, flow, level) in safety-critical pipeline applications
Legacy SIS Modernization – Consolidating low-voltage analog points in aging refinery and power plant racks without full chassis rewiring
Q1: What is the input voltage range of the 3700A?
A1: The 3700A accepts 0–5 VDC differential inputs with a +6% over-range tolerance (up to 5.3 VDC). It can also interface with 0–20 mA current signals using an external 250 Ω shunt resistor.
Q2: What is the TMR architecture of the 3700A?
A2: The 3700A uses Triple Modular Redundancy (TMR) with three independent input channels per point. A mid-value selection algorithm ensures the correct data is selected from the three channels for every scan. The module can operate properly with as many as two faulty channels.
Q3: How many input channels does the 3700A provide?
A3: The 3700A provides 32 differential, DC-coupled analog input channels in a single module.
Q4: What is the update rate and resolution of the 3700A?
A4: The 3700A offers a full-card scan cycle of ≤55 ms with 12-bit native ADC conversion resolution.
Q5: Does the 3700A support hot-swap replacement?
A5: Yes. The 3700A supports hot-spare capability, allowing online replacement of a faulty module without shutting down the system.
Inquiry Now : [email protected]
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