TRICONEX Trident Controller

1. Analog input module

The Model 3351 analog input module consists of three independent isolated channels, each of which independently processes analog input signals from field devices. After processing, the data is transmitted to the associated MP, which then votes and sends it to the application. In TMR mode, the data passed is median; In dual-mode, it is the average value.

This module has comprehensive continuous diagnostic functions, which can detect and indicate any single channel fault, ensuring normal operation under a single fault, and even maintaining operation under multiple faults. Its technical specifications include 32 common points, supporting a nominal input current of 4-20mA DC, and an operating range of 2-22mA DC. The absolute maximum input voltage is 33VDC, and the reverse voltage is -0.6VDC. The input bandwidth (3dB) of the module is 16Hz, the source impedance is 180 ohms, the resolution reaches 12 bits, and the absolute error is less than 0.15% of the full scale. The scanning time is less than 1 millisecond (for all 32 points). In addition, the AI module is compatible with multiple substrates, including standard substrates, RTD/TC/4-20mA dedicated substrates, and substrates that support the HART protocol (including hazardous area types).

2. Analog output module

Trident's analog output module (AO) adopts Model 3481 standard or Model 3482 high current type. Each module has three isolated channels that independently receive MP data. It selects a single channel to drive the output through a voting circuit and short circuits other channels to prevent interference.

Model 3481 provides 4 common circuit and DC coupled isolation points, with an output range of 4-20mA (controllable) and overload capacity of 0-22mA. The output accuracy is less than 0.25% (FSR) within the range of 32 ° F to 158 ° F, with a resolution of 12 bits. The nominal value of the external circuit power supply is 24VDC, with a maximum of 32VDC. The Model 3482 supports high current outputs of 4-40mA on Points 3 and 4 to meet higher power requirements.

The AO module also has hot standby capability and is compatible with standard AO baseboards, HART AO baseboards, and dedicated baseboards for hazardous areas.

3. Digital input module

The Model 3301 digital input module independently processes digital signals through three isolated channels. Each channel transmits the processed data to the corresponding MP for voting. This architecture can effectively prevent a single channel failure from affecting other channels.

This module supports 32 common input points, with a nominal input voltage of 24VDC and an operating range of 15-30VDC. Input delay less than 10 milliseconds (on/off), equipped with Force to value diagnostics (FVD) function, and testing cycle less than 2 milliseconds. The input impedance is approximately 3 kiloohms with a backplane and greater than 30 kiloohms without a backplane. To ensure diagnostic coverage, the maximum switching frequency of input points should be less than 20 times per second.

The DI module is compatible with standard baseboards, external terminal baseboards for high-voltage applications, and specialized baseboards for hazardous areas, and can adapt to various harsh on-site environments.

4. Digital output module

The Model 3401 digital output module adopts proprietary Quad Voter circuit technology. This circuit is based on a parallel series path, and only allows output on/off when any two commands in the three channels (A, B, C) are closed. This design provides multiple redundancies on all critical signal paths, ensuring maximum safety and availability.

The DO module regularly executes the Output Voting Diagnosis (OVD) program, which can detect "adhesion" or "disconnection" faults at all points, as well as faults in related switches or drive circuits, within 500 milliseconds. Its specifications support multiple configurations, including standard type, low current type (with 180 ohm series resistance), and applications for high voltage or hazardous areas.

5. Hybrid and specialized modules

Trident also offers the Model 3361 analog/digital input hybrid module, which integrates 16 digital input points and 16 analog input points, suitable for applications with limited space. The Pulse Input (PI) module (Model 3381) is designed specifically for processing speed sensor signals, capable of converting voltage into frequency (RPM) data and supporting speed measurements up to 32000 RPM. The Solid State Relay Output (SRO) module is used for control of 

Physical Structure, Interconnection, and Expansion

The physical layout of the Trident system emphasizes modularity and compactness.

1. Size and base plate

The dimensions of the MP motherboard, HART AI motherboard, and HART AO motherboard are 9 inches (229 millimeters) wide and 9.79 inches (249 millimeters) long. All types of I/O module baseboards have a width of 7.0 inches (178 millimeters) and the same length. All I/O modules have uniform physical dimensions: 8.65 inches (220 millimeters) high, 1.75 inches (44 millimeters) wide, and 6.65 inches (169 millimeters) deep.

2. I/O Expansion and Interconnection