IEMMU21 ABB

‌IEMMU21 Module Setup & Operation Steps‌

1. ‌Physical Installation‌

   • Mount horizontally/vertically on DIN rail with ≥100mm clearance for ventilation.
   • Verify wiring to terminal blocks (A1-A8, B1-B8) per I/O schematics; tighten screws to ‌0.5 N·m torque‌.

2. ‌Power & Communication Connection‌

   • Connect ‌24VDC ±10%‌ to TB1 (Terminals 1+: / 2-).
   • Link Controller Bus via ‌RJ45‌ to upstream module (max. 3 cascaded units).

1. ‌Hardware Configuration‌
   ‌Critical‌: Set ‌Node Address‌ via DIP switch (SW1).

   • Example: Address “3” = Switch 1+2 ON (Binary 0011).

2. ‌Software Integration‌

   • In DCS/PLC engineering tool (e.g., Honeywell Experion):
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     Add Module → Select "IEMMU21" → Enter configured Node Address → Assign I/O tags

   • Validate mapping to A/B channels (e.g., AI_CH01 = Pressure_Transmitter01).

3. ‌Diagnostic Verification‌

   • Confirm steady ‌GREEN‌ status LED (power) and blinking ‌YELLOW‌ (bus activity).
   • Force analog inputs to test values (e.g., 4mA/20mA) → Check DCS readings match within ±0.1%.

4. ‌Troubleshooting‌

   • ‌Red LED‌: Check power polarity or bus termination.
   • Data skew: Verify ground wire at TB1 Terminal 3 (earth resistance <1Ω).
   • No signal: Validate CSV configuration file matches DIP switch addresses.

IEMMU21 ABB pdf

IEMMU21

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