Overview
The Yokogawa AMM42 S4 Multiplexer Input Module is a high-density analog input interface engineered for precision and efficiency in distributed control systems. It enables multiple analog signals to be sequentially sampled through a single A/D converter, reducing wiring complexity and improving cost-effectiveness. Moreover, its robust design and advanced signal conditioning ensure accurate measurement of voltage, current, and thermocouple inputs even in noisy industrial environments. Designed with Yokogawa’s signature reliability, the AMM42 S4 helps users achieve greater scalability and flexibility in process automation.
Technical Specifications
| Parameter |
Description |
| Model |
AMM42 S4 |
| Manufacturer |
Yokogawa Electric Corporation |
| Function |
Multiplexer Input Module |
| Input Channels |
32 multiplexed analog inputs |
| Input Types |
Voltage, current, thermocouple |
| Input Range |
±10 V DC, 4–20 mA, or thermocouple range |
| A/D Conversion |
16-bit resolution |
| Sampling Time |
1 ms per channel (typical) |
| Isolation |
Channel-to-bus optical and galvanic isolation |
| Accuracy |
±0.1% of full scale |
| Power Supply |
Supplied from system backplane |
| Power Consumption |
Approx. 4.0 W |
| Operating Temperature |
0 to 55°C (32 to 131°F) |
| Storage Temperature |
-20 to 70°C (-4 to 158°F) |
| Humidity Range |
10% to 90% RH, non-condensing |
| Mounting Type |
Rack-mounted, hot-swappable |
| Dimensions |
Approx. 120 mm × 30 mm × 130 mm |
| Weight |
Approx. 200 g |
| Certifications |
CE, UL, CSA, RoHS compliant |
FAQ
Q1: What is the main function of the Yokogawa AMM42 S4 module?
A1: It multiplexes multiple analog input signals into one converter, reducing wiring and improving system efficiency.
Q2: Which input types does it support?
A2: It supports voltage, current, and thermocouple signals for flexible application use.
Q3: Can the AMM42 S4 be used in Yokogawa’s CENTUM VP systems?
A3: Yes, it is fully compatible with CENTUM VP and other Yokogawa DCS platforms.
Q4: How does it improve signal accuracy?
A4: It uses a high-resolution 16-bit A/D converter and advanced noise filtering circuits to ensure precise readings.
Q5: Does the module require system shutdown for maintenance?
A5: No, it supports hot-swapping, allowing safe replacement without system interruption.
