Description

Yokogawa AMM11T Voltage Input Multiplexer Module

The Yokogawa AMM11T, also cataloged as the AMM11T Voltage Input Multiplexer Module, operates as a dedicated hardware component for sequential multi-channel voltage acquisition within distributed control system (DCS) networks.

Hardware Specifications

Parameter	Specification
ModelBrand	Yokogawa AMM11T
Origin	Japan
Weight	0.6 kg
Dimensions	Panel-mount module, chassis-adapted
OperatingTemp	-20 degC to +70 degC
PowerConsumption	Nominal, per datasheet specifications
InputChannels	16 voltage input lines
VoltageInputRange	-10 VDC to +10 VDC (adaptable to 0–5 V or 1–5 V)
SwitchingSpeed	Up to 1000 channels per second
SignalIsolation	Input-to-output and channel-to-channel isolation
Accuracy & Resolution	±0.1% of full-scale

Channel-to-Channel Isolation & Cold Junction Compensation (CJc)

The AMM11T incorporates dedicated electrical isolation between each input channel and the output bus to prevent cross-talk and maintain signal integrity. Cold junction compensation (CJc) is implemented for applications interfacing with thermocouples and other temperature-dependent voltage sensors, ensuring linearized, stable measurements across varying ambient conditions.

Frequently Asked Questions

Q: VnA: Does the AMM11T support hot-swappable operation?
A: No. The module must be powered down prior to insertion or removal to prevent transient voltage spikes or channel misrouting.

Q: VnA: What is the maximum allowable backplane load when multiple AMM11T modules are installed?
A: The module’s current draw is designed to comply with standard DCS backplane ratings; parallel installation should consider cumulative load and isolation requirements.

Q: VnA: Can the firmware be upgraded in-field?
A: Firmware updates are performed through the DCS configuration interface; direct module access is not supported for field flashing.

Field Installation Guidelines

• Mount modules securely to internal panel chassis or designated subsystem racks using standard panel-mount brackets.
• Maintain grounding continuity for shielding layers to minimize EMI/RFI interference.
• Route input wiring in separate channels from power and high-current lines to prevent induction noise.
• Verify isolation gaps and terminal torque specifications to ensure reliable signal integrity.
• Follow standard industrial safety practices when working on live backplanes or terminal blocks.

Specifications

• Brand: Yokogawa

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems