Overview
Specification
| Parameter | Specification |
|---|---|
| Model | 3721 |
| Module Type | Analog Input Module |
| Manufacturer | Triconex |
| Color Code | Yellow |
| Number of Input Signals | 32 differential, DC-coupled |
| Input Update Rate | 10 ms |
| Resolution | 12-bit or 14-bit programmable |
| Accuracy | <0.15% of full scale (0° to 60°C) |
| Input Resistance (Load) | 10 MΩ DC minimum |
| Input Resistance at Power Off | 140 kΩ DC typical |
| Common Mode Rejection (Typical) | -85 dB (DC – 100 Hz) |
| Common Mode Voltage Range | -12 V to +12 V peak |
| Channel-to-Channel Isolation | 420 kΩ typical |
| Normal Mode Rejection | -3 dB @ 23 Hz, -8 dB @ 60 Hz, -14 dB @ 120 Hz |
| Input Voltage Range | 0 to 5 V or -5 to 5 VDC |
| Input Over-Range Measurement | +6%, -5.3 to +5.3 VDC |
| Logic Power | <15 watts |
| Input Over-Range Protection | 150 VDC continuous, 115 VAC continuous |
| Input Current Range | 0 to 20 mA with 250 Ω shunt resistor |
| Field to System Isolation | 800 VDC minimum |
| Module Status Indicators | Pass, Fault, Active, Field |
| Input Diagnostic Fault Coverage | Minimum input change: 2% full scaleInput change sample period: 20 msMinimum period of mis-compares: 25 samples |
| Sampling Rate | Up to 50 Hz per channel |
| Power Supply | 24 V DC nominal |
| Operating Temperature | 0°C to 70°C |
| Storage Temperature | -40°C to 85°C |
| Relative Humidity | 5% to 95%, non-condensing |
| Mounting | DIN rail or chassis mount |
| Status Indicators (LEDs) | Power and channel status indicators |
| Compliance / Standards | IEC 61508 SIL 3, CE certified |
| Dimensions (L×W×H) | 125 mm × 40 mm × 120 mm |
| Weight | Approx. 0.45 kg |
FAQ
A1: The module supports 4–20 mA, 0–20 mA, and 0–10 V analog inputs.Q2: How many channels does the module offer?
A2: The 3721 is configurable with 4 or 8 analog input channels.
Q3: Is this module SIL certified for safety applications?
A3: Yes, it is SIL 3 certified for safety-instrumented systems.
Q4: What is the typical sampling rate per channel?
A4: The module samples analog signals up to 50 Hz per channel.
Q5: Can it integrate with Triconex 3700 series controllers?
A5: Yes, it is fully compatible with Triconex 3700 I/O networks and controllers.
Q6: What is the operating temperature range?
A6: The module reliably operates between 0°C and 70°C.
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