The YOKOGAWA AMM52T, also cataloged as the AMM52T Current Output Multiplexer Module, operates as a dedicated hardware component for driving field-level actuators and valve positioners within CENTUM RIO platform architectures.
| Model | Description |
|---|---|
| AMM52T | Standard current output multiplexer module |
| AMM52T-S2 | Conformal-coated variant for corrosive industrial environments |
| Parameter | Specification |
|---|---|
| Model | AMM52T |
| Brand | YOKOGAWA |
| Origin | Japan |
| Weight | 0.6 kg |
| Dimensions | 282 mm x 210 mm x 20 mm |
| Operating Temp | -10 deg C to +60 deg C |
| Power Consumption | <= 4 A @ 5 VDC |
| Output Channels | 16 (Multiplexed) |
| Signal Range | 4-20 mA DC |
| Accuracy | +/- 48 uA (~0.3% FS) |
The AMM52T employs time-division multiplexing to distribute 16 channels of 4-20 mA DC control signals. In this architecture, channel-to-channel isolation is not provided within the module itself; therefore, external signal isolators are required for applications where ground loop suppression or common-mode noise rejection is necessary. The module interfaces directly with the backplane to receive process variables, converting digital control commands into precise analog current loops with a refresh cycle of approximately 1 second.
Q: Can the AMM52T be used in a redundant system configuration?
A: Yes. The module supports dual-redundant setups when installed in compatible CENTUM RIO nests. Users must ensure that the corresponding software configuration in the Field Control Station (FCS) is set to support pair-based redundancy to prevent control output discontinuities during module failover.
Q: Are there specific installation requirements for the M4 screw terminals?
A: Yes. Field wiring must utilize appropriately sized lugs for M4 screws. Torque the connections according to standard industrial specifications to ensure consistent contact resistance, especially since the module relies on backplane power and lacks internal galvanic channel isolation.
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