Technical Specifications:

• Number of Channels: 2 channels
• Input Signal: 4–20 mA DC (2-wire loop powered)
• Display: 4-digit red LED display (7-segment, 14.2 mm digit height)
• Output Signal: 4–20 mA DC (isolated retransmission, optional)
• Accuracy: ±0.2% of span
• Power Supply: 24 VDC (±10%)
• Insulation: Input-to-output isolation
• Insulation Resistance: ≥20 MΩ at 500 VDC
• Dielectric Strength: 1500 VAC for 1 minute
• Response Time: ≤200 ms
• Alarm Output: 2 relay contacts (SPDT) per channel — configurable high/low
• Operating Temperature: -10°C to +55°C
• Mounting: 35 mm DIN rail (EN 50022) or Panel mount
• Dimensions: 48 mm × 96 mm × 112.5 mm (W × H × D)
• Weight: Approximately 200 g

Functional Features:

• 2-channel independent monitoring with individual LED displays
• 4-digit LED display shows process value in engineering units
• Alarm relay outputs — independently configurable high/low setpoints per channel
• Isolated 4–20 mA retransmission — passes signal to downstream devices
• Loop-powered — no external power required for input channels
• DIP switch configuration — range, alarm setpoints, output type

Material Composition:

• Housing: Flame-retardant ABS resin (UL94 V-0)
• Front Panel: Polycarbonate with LED window
• Terminals: Phosphor bronze, tin-plated screw terminals
• PCB: Epoxy-coated FR-4

Structural Characteristics:

• Form Factor: Compact DIN rail / panel mount
• Width: 48 mm
• Height: 96 mm
• Depth: 112.5 mm

Working Principle:
The AMM22T receives a 4–20 mA signal on each of its 2 input channels. The signal is converted to a digital value by an internal A/D converter and displayed on the 4-digit LED. The microprocessor compares the measured value against configurable alarm setpoints (high and low). When a setpoint is violated, the corresponding relay contact changes state. The input signal is also retransmitted as an isolated 4–20 mA output to downstream devices.

Key Advantages:

• Dual-channel monitoring in one compact unit
• Visible LED display — instant process value verification
• Built-in alarm relays — eliminates need for separate alarm units
• Isolated retransmission — clean signal pass-through
• Loop-powered — simple 2-wire installation

Applicable Industries:

• Process control panels (signal verification)
• Water & Wastewater
• HVAC systems
• General industrial automation
• Food & Beverage

Installation Requirements:

• Mount on 35 mm DIN rail (EN 50022) or panel
• Wire 4–20 mA inputs using shielded twisted-pair cable
• Set alarm setpoints via front-panel DIP switches or digital interface
• Provide 24 VDC power supply for the module itself

Usage Precautions:

• Do not exceed maximum input of 25 mA
• Verify alarm setpoints before commissioning
• Relay contacts rated 250 VAC 3 A / 30 VDC 3 A — do not exceed
• Ensure shield grounding at control panel end only