On AC voltage Digital Output Modules, a fault switch identified by the OVD process causes the output signal to transition to the opposite state for a maximum of half an AC cycle. This transition may not be transparent to all field devices. After a fault is detected, the module discontinues further iterations of OVD. Each point on an AC voltage Digital Output Module requires periodic cycling to both the On and Off states to ensure 100 percent fault coverage.

DC Digital Output Modules

DC voltage Digital Output Modules are specifically designed to control devices which hold points in one state for long periods of time. The OVD strategy for a DC voltage Digital Output Module ensures full fault coverage even if the commanded state of the points never changes. On this type of module, the output signal transition normally occurs during OVD execution, but is guaranteed to be less than 2.0 milliseconds (500 microseconds is typical) and is transparent to most field devices.

Dual DC Digital Output Modules

Dual Digital Output (DDO) Modules provide just enough redundancy to ensure safe operation. Dual modules are optimized for those safety-critical applications where low cost is more important than maximum availability

Supervised Digital Output Modules

Supervised Digital Output Modules provide both voltage and current loopback, allowing complete fault coverage for both energized-to-trip and de-energized-to-trip conditions. In addition, a Supervised Digital Output Module verifies the presence of the field load by doing continuous circuit-continuity checks. Any loss of field load is annunciated by the module.

Pulse Input Modules

Each Pulse Input Module includes three channels which measure the input frequency independently. Special algorithms, optimized for accurately measuring the speed of rotating machinery, are used to compensate for irregularly spaced teeth on timing gear or for periodic acceleration/de-acceleration. The results are placed into a table of values. Each input table is passed to its associated MP using the corresponding I/O bus. The input table in each MP is transferred to its neighbors across the TriBus. The middle value is selected by each MP and the input table in each MP is corrected accordingly. In TMR mode, the mid-value is used by the application; in duplex mode, the average is used. Special self-test circuitry is provided to diagnose the health state of all input points, even when an active signal is not present. Each Pulse Input Module is guaranteed to remain in calibration for the life of the controller; periodic manual calibration is not required.

Thermocouple Input Modules

Each Thermocouple Input Module has three independent input channels. Each input channel receives variable voltage signals from each point, performs thermocouple linearization and cold-junction compensation, and converts the result to degrees Celsius or Fahrenheit. Each channel then transmits 16-bit signed integers representing 0.125 degrees per count to the three Main Processors on demand. To ensure correct data for every scan, a value is selected using a mid-value selection algorithm.

Triplicated temperature transducers residing on the field termination module support coldjunction compensation. Each channel of a thermocouple module performs auto-calibration and reference-junction compensation every five seconds using internal-precision voltage references. On the Isolated Thermocouple Module, a cold-junction indicator announces the failure of a cold-junction transducer. On the Non-Isolated Thermocouple Module, a Fault indicator announces a transducer fault.

Sensing of each thermocouple input is performed in a manner which prevents a single failure on one channel from affecting another channel. Each module performs complete ongoing diagnostics on each channel.

Field Terminations

Various termination options are available for field wiring of the Tricon chassis, including external termination panels (ETPs) and fanned-out cables.

An ETP is an electrically-passive printed circuit board to which field wiring is easily attached. An ETP passes input signals from the field to an input module or passes signals generated by an output module directly to field wiring, thereby permitting removal or replacement of the input or output module without disturbing field wiring.

A fanned-out cable is a lower-cost alternative to an ETP when using digital input or digital output modules. One end of a fanned-out cable connects to the Tricon chassis backplane and the other end provides 50 fanned-out leads, each individually labeled with a pin number that matches the connector signals. For more information, see the Field Terminations Guide for Tricon v9–v11 Systems.

Communication Modules

A Tricon controller can communicate with other Triconex controllers and external devices. Communication modules enable serial and network communication using a variety of communication protocols. The Main Processors broadcast data to the communication modules across the communication bus. Data is typically refreshed every scan; it is never more than two scan-times old.

For more information about communication setup and protocols, see the Communication Guide for Tricon v9–v11 Systems.

Advanced Communication Module (ACM)

The ACM (Advanced Communication Module) acts as an interface between a Tricon controller and a Foxboro Intelligent Automation (I/A) Series DCS, appearing to the Foxboro system as a safety node on the I/A Series® Nodebus. The ACM communicates process information at full network data rates for use anywhere on the I/A Series DCS, transmitting all Tricon controller aliased data (including system variables and system aliases) and diagnostic information to operator workstations in display formats that are familiar to Foxboro operators.

Note: ACMs are compatible with Tricon v10.x and earlier systems.

Enhanced Intelligent Communication Module (EICM)

The Enhanced Intelligent Communication Module (EICM) enables a Tricon controller to communicate with Modbus devices (masters or slaves), with a TriStation PC, and with a printer. The four serial ports are uniquely addressed and can be used for Modbus or TriStation communication at speeds up to 19.2 kilobits per second. A single Tricon High-Density controller supports up to two EICM modules which reside in one logical slot. This arrangement provides a total of six Modbus ports, two TriStation ports, and two printer ports.

Note :EICMs are compatible with Tricon v10.x and earlier systems.

Hiway Interface Module (HIM)

The Hiway Interface Module (HIM) acts as an interface between a Tricon controller and a Honeywell TDC-3000 control system via the Hiway Gateway and Local Control Network (LCN). The HIM can also interface with a Honeywell TDC-2000 control system via the Data Hiway. The HIM enables higher-order devices on the LCN or Data Hiway, such as computers and operator workstations, to communicate with the Tricon controller. The HIM allows redundant BNC connections directly to the Data Hiway and has the same functional capacity as up to four extended Data Hiway Port (DHP) addresses.

Network Communication Module (NCM)

The Network Communication Module (NCM) enables the Tricon controller to communicate with other Triconex controllers and with external devices on Ethernet networks using a highspeed 10 megabits per second data link. The NCMG allows the Tricon controller to synchronize controller time based on GPS information.

Safety Manager Module (SMM)

The Safety Manager Module (SMM) acts as an interface between a Tricon controller and a Honeywell Universal Control Network (UCN), which is one of three principal networks of the TDC-3000 Distributed Control System. Appearing to the Honeywell system as a safety node on the UCN, the SMM communicates process information at full network data rates for use anywhere on the TDC-3000. The SMM transmits all Tricon controller aliased data (including system variables and system aliases) and diagnostic information to operator workstations in display formats that are familiar to Honeywell operators.

Tricon Communication Module (TCM)

The Tricon Communication Module (TCM) enables a Tricon controller to communicate with Modbus devices (masters or slaves), a TriStation PC, a network printer, other Triconex controllers, and other external devices on Ethernet networks.

Each TCM has four serial ports, two Ethernet network ports, and one debug port (for Invensys use). TCM Models 4353 and 4354 have an embedded OPC server, which allows up to ten OPC clients to subscribe to data collected by the OPC server. The embedded OPC server supports the Data Access standard and the Alarms and Events standard.

A single Tricon controller supports up to four TCMs, which reside in two logical slots. This arrangement provides a total of sixteen serial ports and eight Ethernet network ports.

TCMs are compatible only with Tricon v10.0 and later systems. TCM Models 4351B, 4352B, 4353, and 4354 are compatible only with Tricon v10.3 and later systems. For complete compatibility information, see the Tricon Product Release Notices available on the Global Customer Support (GCS) center website.
Same functional module:
TRICONEX   3504E
TRICONEX   3511
TRICONEX   3515
TRICONEX 3601E
TRICONEX 3604E
TRICONEX 3607E
TRICONEX   3623T
TRICONEX   3625
TRICONEX  3625A
TRICONEX   3625C1
TRICONEX   3625
TRICONEX 3636R
TRICONEX   3664
TRICONEX 3700A
TRICONEX 3703E
TRICONEX   3708E
TRICONEX   3708EN
TRICONEX   3721C
TRICONEX 3721
TRICONEX   3805E
TRICONEX   3806E
TRICONEX 3902AX
TRICONEX 4000056-002
TRICONEX 4000066-025