Yokogawa AAT145-S00

AAT145-S00 Input Module

Manufacturers: Yokogawa

Model(s): Yokogawa Centum CS - Centum VP

Estimated Shipping Size: 2.5 x 12.7 x 12.7 cm

Weight: 0.3kg

Availability: In Stock

Estimated Lead Time: Usually Ships in 5 - 7 Working Days

Shipping Weight: 1 Kg

12 Month Free Replacement Warranty

Other Version of AAT145

AAT145

AAT145-S00

AAT145-S03

AAT145-S50

AAT145-S53

About Yokogawa'sProSafe-RS

Yokogawa's ProSafe-RS safety instrumented system is used for many applications1 as a system conforming to the safety integrity level (SIL) 3 defined in the IEC61508 international functional safety standard2.

To deal with temperature inputs, systems were conventionally configured using signal conditioners. However, securing enough space for signal conditioners was often difficult in such system configurations. Especially when SIL 3 is required, the problem is serious because a redundant configuration is required. Figure 1 shows an external view of the newly developed temperature input modules conforming to SIL 3: SAT145 for the thermocouple and SAR145 for the resistance temperature detector.

Using a new temperature input module eliminates the need for a signal conditioner as shown in Figure 2. Combined with the compact terminal board that was concurrently developed, the modules solve the problem of installation space.

These newly developed modules are based on the basic specifications and highly reliable technologies of the existing AAT145 and AAR145 temperature input modules for the CENTUM VP integrated production control system. Employing more advanced self-diagnosis, they have achieved conformity to SIL 3, which safety systems are required to meet. The modules have also satisfied the requirements for high-speed input response and fault detection, both of which safety system applications are required to meet. They also have achieved high availability and maintainability to increase plant productivity.

This paper explains the high safety integrity level, high-speed response, high availability, and increased maintainability required for a safety module, which is all achieved in the new modules.

The basic specifications of the newly developed SAT145/ SAR145 temperature input modules are equal to or higher than those of the AAT145 and AAR145 temperature input modules for our CENTUM VP system. Table 1 shows the basic specifications of the new modules.

While there are as many as 16 input points, individual channels are isolated and the data update period is as high as 150 ms.

The burnout (breaking of a wire) detection time is reduced to 1.5 seconds, over ten times faster than the CENTUM VP I/O modules.

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