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B&R 3AM374.6
Model Series: X20 System (AM = Analog Module — Input)
Product Overview:
The 3AM374.6 is a 4-channel analog input module from B&R’s X20 I/O system. It acquires analog signals (current or voltage) from field sensors such as pressure transmitters, temperature sensors, and flow meters. The module provides 12-bit resolution and supports both 4–20 mA and 0–10 V input ranges.
Detailed content
Technical Specifications:
- Module Type: Analog Input (AI)
- Number of Channels: 4 channels (single-ended)
- Input Signal Types: 4–20 mA (2-wire) OR 0–10 V DC (voltage)
- Resolution: 12 bit (4096 steps)
- Input Impedance (Voltage Mode): Greater than 500 kΩ
- Input Impedance (Current Mode): 250 Ω (internal shunt)
- Accuracy: ±0.1% of full scale (at 25 °C)
- Conversion Time: 1 ms per channel (4 channels simultaneous sampling)
- Isolation Voltage: 500 V DC (channel-to-channel, channel-to-bus)
- Common Mode Rejection: Greater than 80 dB
- Communication Interface: X20 Link (100 Mbps Ethernet)
- Bus Connection: RJ45 connector (X20 bus daisy-chain)
- Power Supply: 24 V DC via X20 bus
- Power Consumption: Approximately 1.5 W (typical)
- Protection Rating: IP20
- Operating Temperature: 0 °C to +55 °C
- Storage Temperature: -25 °C to +70 °C
- Dimensions (W × H × D): Approximately 45 mm × 90 mm × 75 mm
- Weight: Approximately 0.12 kg
- Mounting: DIN rail TS 35, 7.5 mm width per module
Functional Features:
- 4 independent analog input channels
- Configurable per-channel: 4–20 mA or 0–10 V
- 12-bit resolution with simultaneous sampling
- Galvanic isolation on all channels
- LED status indicators per channel
- Diagnostic data available via Automation Studio
- Hot-swap capable on X20 bus
Applicable Industries:
Process control, HVAC, water treatment, oil and gas, chemical processing, food and beverage, pharmaceutical.
Installation Requirements:
- Mount on DIN rail TS 35 (7.5 mm module width)
- Connect to X20 bus via RJ45 daisy-chain
- 24 V DC power via X20 bus — no external power required
- For 4–20 mA: connect transmitter in series with internal 250 Ω shunt
- For 0–10 V: connect sensor output to differential input terminals
- Use shielded twisted-pair cable for all analog signals
Usage Notes:
- Do not apply voltage exceeding 12 V DC to voltage input terminals
- For 4–20 mA: ensure loop power supply voltage is sufficient (min 18 V DC + sensor drop)
- Calibrate zero and span via Automation Studio for each channel
- Shield ground must be connected at controller end only (single-point grounding)
