Description

Yokogawa AMM22M Analog Input Multiplexer Module

Configured for process signal multiplexing in Yokogawa CS3000 Distributed Control System, the Yokogawa AMM22M (AMM22M Analog Input Multiplexer Module) provides direct physical/electrical execution. The module conditions and sequentially scans multiple analog field inputs including voltage, current, and RTD temperature signals, converting them into time-multiplexed data streams for DCS acquisition and processing without additional external signal switching hardware.

Suffix Breakdown & Model Matrix

No documented suffix segmentation or ordering matrix is defined for AMM22M in the provided technical data. The model is treated as a single fixed hardware variant.

Hardware Specifications

Parameter	Specification
ModelBrand	Yokogawa AMM22M
Origin	JAPAN
Weight	0.3kg
Dimensions	45 x 97 x 103 mm (W x H x D)
OperatingTemp	-10 degC to +60 degC
PowerConsumption	Not specified
Input Voltage Range	-10 VDC to +10 VDC
Input Current Range	0 mA to 20 mA DC
Temperature Input	-200 degC to +600 degC (RTD)
Sampling Rate	100 Hz
Switching Time	10 ms max
Input Impedance	100 MOhm min
Insulation Resistance	100 MOhm min

Channel-to-Channel Signal Multiplexing Architecture (Yokogawa DCS Behavior)

The AMM22M implements sequential channel scanning across 22 analog input channels, executing time-division multiplexing prior to digitization within the CS3000 I/O architecture. In Yokogawa DCS environments, channel-to-channel isolation is maintained to reduce inter-channel loading effects during high-impedance measurement acquisition, particularly for RTD and low-current loop inputs. The multiplexing cycle operates within defined switching latency limits, ensuring deterministic sampling alignment at system-level scan intervals.

Frequently Asked Questions

Q: Does the AMM22M support simultaneous multi-channel acquisition?
A: No. The module performs sequential multiplexing across 22 channels using time-division scanning.

Q: What is the impact of input impedance on signal loading?
A: The 100 MOhm minimum input impedance minimizes loading effects on high-impedance voltage and RTD sources.

Q: Is channel switching synchronized with DCS scan cycles?
A: Channel switching operates within a 10 ms maximum switching window and is aligned to CS3000 acquisition scheduling.

Field Installation Guidelines

The AMM22M shall be installed on a standard Yokogawa I/O base unit with secure backplane engagement. Field wiring must use shielded twisted pair conductors for analog voltage and current loops, with shield termination performed at a single-point ground to prevent ground loop formation. RTD inputs require dedicated 3-wire or 4-wire configuration depending on sensor type, with lead resistance balancing applied at terminal level. Maintain separation between analog signal cables and power conductors to reduce electromagnetic coupling. Ensure module seating is fully locked into the rack connector to maintain stable backplane communication integrity.

Specifications

• Brand: Yokogawa

Advantages

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