AI2351 Triconex Analog Input Module

grounded, and the Tricon is operating normally, the wiring and attached devices will not

release sufficient energy to cause ignition in the specified flammable atmosphere.

Termination Panels with Interposing Relays

Termination panels with interposing relays can be used with most digital output modules and

are recommended for these applications:

• Load currents greater than 2 amps

• Field voltages greater than 115 VAC

• Voltage-level conversions

• Motor-starter circuit compatibility

Interposing relay panels are available in these configurations:

• 16-point c

ommoned

• 16-point non-commoned

The digital outputs of the interposing relays are not fault-tolerant. However, each relay

provides an auxiliary contact that can be fed into a digital input to send a loopback signal to the

control program. A user-written loopback check in the control program can ensure that the relay

has achieved its commanded state. The loopback cable must be ordered separately.

Each interposing relay panel provides the capability to common power and return through a

factory-mounted bus-bar arrangement.

Each interposing relay panel consists of:

• A 7 in x 19 in (36 cm x 48 cm) rack-mountable panel with terminals for 16 digital

outputs and 16 digital inputs.

• Two ELCO connectors mounted on the panel for connecting to digital input modules

using digital input cables 9141-010. 9142-010. or 9143-010.

• An EIA standard RS-310-C plate on which the termination panel is mounted.

• A digital output module and a cable compatible with the selected coil voltage.

Bypass Panel for Digital Inputs

Bypass termination panels can be used to connect digital inputs using a bank of 32 pre-wired

switches. Bypass panels have a master keyswitch and terminals for redundant +24 VDC power

sources. Each input point contains an ON status indicator and can be energized only if the

master keyswitch is ON and the corresponding point switch is ON. Each point has a location for

a user-definable label.

Each bypass termination panel comes with one or two 10-foot (3-meter) cables for connecting

the termination panel to a Tricon backplane.

Therefore, each Tricon variable name must be assigned an alias that will be read by

or written to the Modbus device.

An alias is a five-digit number that represents the Modbus message type and the address

of the variable in the Ticon. An alias number is assigned in the TriStation.

Any standard Modbus device can communicate with Tricon via TCM, provided an alias is

assigned to the Tricon variable.

The alias number must also be used when the host accesses the Tricon through other

communication modules.

Each TCM contains two network ports – NET 1 and NET 2. Models 4351A and 4353 have

two copper Ethernet (802.3) ports and Models 4352A and 4354 have two fiber optic Ethernet ports.

NET 1 and NET 2 support TCP/IP, Modbus TCP/IP Slave/Master, TSAA, TriStation,

The NET 1 also supports the Peer-to-Peer and Peer-to-Peer Time Synchronization protocols.

A single Tricon system supports up to four TCMs, which must reside in two logical slots.

Different TCM models cannot be mixed in a logical slot.

Each Tricon system supports a total of 32 Modbus masters or slaves, including network and serial ports.

The hot standby feature does not apply to TCMs, but you can replace a defective

TCM while the controller is online.