Description
Designed for direct integration into industrial control architectures, the Honeywell 2MLF-AC8A functions as a high-density, 8-channel analog current input interface. This module translates external analog process signals into precise digital values for the host controller, offering rapid processing with a conversion speed of 250 microseconds per channel. Built to maintain signal fidelity in electrically noisy environments, the module incorporates robust photo-coupler isolation between the field input terminals and the internal PLC backplane logic.
Key Features
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8 High-Density Channels: Allows simultaneous monitoring of up to eight independent current loops.
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Fast Conversion Rate: Accomplishes analog-to-digital processing within 250 microseconds per active channel.
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Optoelectronic Isolation: Safe photo-coupler isolation protects sensitive control logic from field-side electrical surges.
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Standard 18-Point Terminal: Employs a physical 18-point connection block for secure, reliable field wiring.
Applications
- Continuous process monitoring in water and wastewater treatment facilities.
- Integrated pressure, flow, and temperature transmitter feedback loops.
- Petrochemical and chemical processing plant telemetry acquisition.
- Factory automation systems requiring high-speed analog signal tracking.
Technical Specifications
| Parameter |
Value / Specification |
| Manufacturer |
Honeywell |
| Model Number |
2MLF-AC8A |
| Module Type |
Analog Current Input Module |
| Input Channels |
8 Channels / 1 Module |
| Max Conversion Speed |
250 us / channel |
| Accuracy (at 25 degC) |
+/-0.2% or less (within 25 degC +/-5 degC) |
| Accuracy (Full Temp Range) |
+/-0.3% or less (0 to 55 degC) |
| Absolute Maximum Input |
+/-30 mA |
| Isolation Method |
Photo-coupler isolation (Terminals to PLC power); No channel-to-channel isolation |
| Connection Method |
18-point terminal block |
| I/O Address Allocation |
Fixed: 64 points / Variable: 16 points |
| Internal Current Consumption |
420 mA @ 5 VDC |
| Net Weight |
0.14 kg |
| Shipping Weight |
2.0 kg (packaged) |
Installation Guidelines
CRITICAL WARNING
Ensure all primary AC and secondary DC power sources feed-in to the system rack are completely de-energized before mounting, unmounting, or wiring the module. Failure to isolate power can result in terminal damage, logic errors, or localized electrical shock hazards.
1
Align the module's lower locking tab with the designated slot on the PLC backplane rack.
2
Carefully pivot the module upward, pressing it firmly into the backplane connector until you hear the retention clip click securely into place.
3
Connect analog field wiring to the 18-point terminal assembly, keeping low-voltage current signals physically routed away from high-voltage motor control lines to prevent induced electromagnetic noise.