AMM21 S3 Yokogawa Thermocouple Input Multiplexer Module

Availability: 10 left in stock

Yokogawa AMM21 CENTUM VP/CS 3000 Module Configured for Specific Technical Task in CENTUM VP, CS 3000, STARDOM FCN/FCJ controllers, the...

SKU: AMM21

Manufacturer: Yokogawa
Product No.: AMM21
Product Type: Thermocouple Input Multiplexer Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 200g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa AMM21 CENTUM VP/CS 3000 Module

Configured for Specific Technical Task in CENTUM VP, CS 3000, STARDOM FCN/FCJ controllers, the Yokogawa AMM21 S3 (AMM21 Thermocouple Input Multiplexer Module) provides direct physical/electrical execution. This dedicated hardware component acquires multiple thermocouple signals, executes analog-to-digital conversion, and executes deterministic data transmission to system controllers. The assembly integrates 16 distinct thermocouple input channels alongside localized analog-to-digital circuitry, providing direct processing of sub-millivolt temperature sensor potentials across the internal system bus architecture.

Hardware Specifications

Parameter	Specification
Model	AMM21 S3
Brand	Yokogawa
Origin	Japan
Weight	0.2 kg
Dimensions	12.7 cm x 2.5 cm x 20.3 cm
Operating Temp	0-55 deg C
Power Consumption	3.5 W
Input Channels	16 thermocouple inputs
Supported Thermocouples	K, J, T, E, N, B, R, S
Resolution	16-bit A/D conversion
Accuracy	+/-0.1% FS
Input Impedance	>=10 MΩ
Input Voltage Supply	24 V DC via I/O base
Compliance	CE, RoHS, IEC 61010-1, IEC 61326-3-1

Cold Junction Compensation and Channel Isolation

The hardware incorporates automated cold junction compensation (CJC) directly at the terminal block level to negate the thermal EMF generated at the copper-to-thermocouple junction points. The micro-architecture relies on channel-to-bus and channel-to-ground isolation elements to block common-mode voltage spikes and suppress localized ground loops from interfering with the 16-bit A/D conversion subsystem. Internal 50/60 Hz noise filters remove induced AC frequency interference from the low-voltage sensor lines before the system multiplexer cycles the signals. This maintains physical loop stability and signal clarity under fluctuating plant environments where high-power electrical machinery creates localized electromagnetic fields.

Frequently Asked Questions

Q: How does the hot-swap restriction govern the replacement of this module during controller execution?

A: Technicians can pull and replace the module while the I/O base remains powered. The internal diagnostic subsystem handles live insertion parameters, but operators must ensure that the specific loop configurations match the firmware revision active on the backplane to prevent bus faults.

Q: What action does the module execute if a field wire breaks on a thermocouple channel?

A: The integrated diagnostics activate an open-circuit detection routine. The module transmits a specific out-of-range upscale or downscale diagnostic value across the system bus, signaling the controller to register an I/O channel error state.

Field Installation Guidelines

Mount the I/O base securely onto the structural frame using standard industrial layout criteria before sliding the module into its designated slot. Field thermocouple wiring requires dedicated twisted-pair extension cables matching the specific thermocouple chemistry in use. Route all low-level sensor cables through separate wire ducts away from high-voltage motor supply lines to reduce capacitive noise coupling. Connect the outer cable shields to the single-point instrument ground termination bar inside the enclosure. Ensure the internal ambient temperature within the cabinet remains below 55 deg C by providing adequate space for natural convection or mechanical air movement across the I/O rack.

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