AMM12T-S2 Yokogawa Analog Input Module

AMM12T-S2 Yokogawa CENTUM Voltage Input Multiplexer Module

AMM12T-S2 Yokogawa CENTUM Voltage Input Multiplexer Module

Availability: 20 left in stock

Yokogawa AMM12T-S2 Voltage Input Multiplexer Module The Yokogawa AMM12T-S2, also cataloged as the AMM12T-S2 Voltage Input Multiplexer Module, operates as...

SKU: AMM12T S2

Manufacturer: Yokogawa
Product No.: AMM12T S2
Product Type: Analog Input Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 500g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa AMM12T-S2 Voltage Input Multiplexer Module

The Yokogawa AMM12T-S2, also cataloged as the AMM12T-S2 Voltage Input Multiplexer Module, operates as a dedicated hardware component for sequential signal multiplexing and analog data acquisition within CENTUM VP and CENTUM CS 3000 control system platforms.

Hardware Specifications

Parameter	Specification
Model	AMM12T-S2
Brand	Yokogawa
Origin	Japan
Weight	0.5 kg
Dimensions	51 x 76 x 229 mm
Operating Temp	0 to 55 deg C
Power Consumption	24 VDC
Input Channels	16 channels
Supported Signal Types	4-20 mA current, AC/DC voltage, RTD, thermocouple
Resolution	16-bit A/D conversion
Accuracy	+/- 0.1% of full scale
Isolation	Channel-to-channel and channel-to-system bus
Temperature Measurement Range	-200 to +600 deg C
Maximum Input Current	20 mA max
Storage Temperature	-20 to 70 deg C
Humidity Range	10 to 90% RH (non-condensing)
Mounting	Rack slot or DIN rail
Certifications	CE, UL, IEC standards

DCS Process Control and Channel Isolation Features

The Yokogawa AMM12T-S2 integrates advanced channel-to-channel isolation architecture to eliminate ground loops and prevent common-mode voltage interference across field instrumentation loops. The onboard multiplexing circuitry sequentially routes up to 16 analog inputs—including 4-20 mA HART loops, DC voltage inputs, RTDs, and thermocouples—into a high-resolution 16-bit A/D converter core.

Additionally, internal cold junction compensation (CJC) algorithms ensure high-accuracy thermal readings when processing thermocouple signals directly from field junction boxes. By routing signals through robust galvanic isolation barriers, the module maintains data integrity and shields the internal CENTUM system backplane bus from external electrical surges.

Frequently Asked Questions

Q: How does the module handle signal isolation across its 16 input channels?

A: The module utilizes integrated optical and galvanic isolation barriers between individual channels as well as between the input circuitry and the system backplane bus. Consequently, this prevents stray ground loop currents from distorting precision voltage readings.

Q: Can the AMM12T-S2 process thermocouple inputs without external temperature reference units?

A: Yes. The module features integrated cold junction compensation (CJC) logic, which automatically adjusts thermocouple voltage readings to account for ambient temperature shifts at the module terminal interface.

Field Installation Guidelines

Cabinet Mounting and Clearance: Mechanics must mount the module securely into the designated backplane rack slot or standard DIN rail setup. Furthermore, field technicians must preserve a minimum top and bottom clearance of 50 mm to facilitate passive convective cooling across the internal heat sinks.
Shielding and Grounding Connections: Installers must terminate all analog field cabling using twisted shielded pairs. Consequently, connect cable drain wires directly to the functional earth (FE) terminal bus bar at a single point to mitigate high-frequency electromagnetic interference.
Wiring Separation and Voltage Isolation: Field engineers must maintain strict physical separation between low-level sensor cabling (thermocouples, RTDs, 4-20 mA loops) and high-voltage AC power lines within the enclosure wire trunks.
Hot-Swapping and Terminal Verification: Before removing or inserting the module during system maintenance, technicians must ensure the terminal block retention screws are fully disengaged and verify that loop power voltages do not exceed the 24 VDC operating boundary.

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Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

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We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.