What is the exact system role of T8442?

It is the Trusted TMR rotating-machinery speed and acceleration monitor with fault-tolerant shutdown outputs.

Which host, rack or carrier is required for T8442?

Use the configured Trusted chassis together with the T8846 speed-input FTA and T8891 speed-output FTA.

What wiring or connector checks apply to T8442?

Verify the TC-801 interface, probe polarity, field returns, shields and the field-output circuits before test injection.

How is T8442 configured for service?

Configure each group for probe type, tooth count, speed scaling, trip values, acceleration logic, voting and bypass behavior.

Which diagnostics should be reviewed for T8442?

Review probe faults, frequency validity, slice discrepancies, group status, module health and shutdown-output diagnostics.

What must be preserved when replacing T8442?

Preserve all three group assignments, probe data, setpoints, output mapping, hardware revision and approved bypass state.

How should T8442 be commissioned after installation?

Inject controlled frequency ramps, prove indication and voting, then verify each trip output and reset sequence.

What model-specific limitation must be checked for T8442?

The 30 kHz input limit and the tooth-count/RPM relationship must both be checked for the monitored rotor.

T8442

Name: T8442
Brand: ICS Triplex
SKU: T8442

Trusted TMR Speed Monitor

Product image is representative; revision or series may vary. Contact us to request a specific version.

Product Describe：

ICS Triplex T8442 is a Trusted triple modular redundant speed monitor for rotating machinery. It evaluates speed and acceleration inputs and supplies fault-tolerant shutdown outputs for overspeed protection.

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Technical specifications for T8442

Manufacturer:

ICS Triplex
Product Category:

PLC Systems
Spare Part Number:

T8442
Estimated shipping dimensions:

3x30.5x26.5cm
Weight:

1.24 kg
Tariff Code:

8537101190
Counliy of origin:

USA
Speed groups:

3
Input architecture:

3 TMR speed inputs per group
Output architecture:

2 quad-redundant structures per group
Sensor types:

Active and passive
Input frequency:

Up to 30 kHz
Input duty cycle:

20 to 80%
Speed resolution:

+/-1 RPM
Speed accuracy:

0.01% FS or 1 RPM, whichever is greater
Detection threshold:

200 mV peak-to-peak
Field supply:

18 to 32 Vdc
System supply:

20 to 32 Vdc
System power:

22 W at 24 Vdc
Operating temperature:

0 to 60 deg C

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Information

Overview Manuals Common Applications Product Precautions

T8442 provides three independent rotating-machine protection groups in one Trusted TMR module. Each group combines redundant speed sensing with fault-tolerant shutdown structures.

Protects rotating equipment against overspeed and overacceleration
Handles active or passive probe interfaces through the approved SIFTA
Provides independent protection groups for multiple machine trains
Combines continuous diagnostics with fault-tolerant shutdown outputs

The module operates through the Trusted chassis and model-specific speed-monitor field termination assemblies. Engineering setup includes probe type, tooth count, speed scaling, acceleration logic, trip voting, bypass state and proof testing of associated shutdown circuits.

Important Notice: Confirm T8442 identity and revision, Trusted chassis, T8846 SIFTA, T8891 SOFTA, TC-801 cabling, probe type, tooth count, speed and acceleration settings, firmware/application versions, bypass status and full trip proof test before commissioning.

Apter Power T8442 Manuals and Guides

The first document is the model-specific technical and system reference. The second is a distinct field workbook for installation, wiring, commissioning and acceptance records.

Turbine overspeed protection

Monitors shaft-speed inputs and commands the engineered shutdown path when the configured limit is exceeded.

Compressor train protection

Applies independent speed groups to rotating compressor drivers and their trip circuits.

Generator speed supervision

Tracks shaft frequency and acceleration during controlled start-up and operation.

Pump-driver acceleration monitoring

Supervises transient speed behavior where rapid acceleration must initiate protective action.

Read the applicable ICS Triplex installation instructions before work. Verify T8442, the installed host system and all configured field interfaces before isolation, wiring or commissioning.

Confirm T8442, hardware revision and all three configured speed groups.

Place each connected machine train and trip circuit in a safe test state.

Verify T8846 SIFTA, T8891 SOFTA and TC-801 cable identities.

Record probe type, tooth count, scaling, trip and acceleration settings.

Check field and system supplies, returns, shields and grounding.

Inspect bypasses and overrides and obtain approval before test injection.

Simulate each speed channel and verify voting and diagnostic behavior.

Prove every shutdown output and remove test states before service release.

Technical notes

Install T8442 with the approved T8846 SIFTA, T8891 SOFTA and TC-801 field interface cable, then configure each speed group for its probe type and toothed-wheel data. Validate direction, frequency response, trip setpoints and every shutdown output using controlled rotation or signal simulation.

FAQ View All FAQ

What is the exact system role of T8442?

It is the Trusted TMR rotating-machinery speed and acceleration monitor with fault-tolerant shutdown outputs.
Which host, rack or carrier is required for T8442?

Use the configured Trusted chassis together with the T8846 speed-input FTA and T8891 speed-output FTA.
What wiring or connector checks apply to T8442?

Verify the TC-801 interface, probe polarity, field returns, shields and the field-output circuits before test injection.
How is T8442 configured for service?

Configure each group for probe type, tooth count, speed scaling, trip values, acceleration logic, voting and bypass behavior.

Which diagnostics should be reviewed for T8442?

Review probe faults, frequency validity, slice discrepancies, group status, module health and shutdown-output diagnostics.
What must be preserved when replacing T8442?

Preserve all three group assignments, probe data, setpoints, output mapping, hardware revision and approved bypass state.
How should T8442 be commissioned after installation?

Inject controlled frequency ramps, prove indication and voting, then verify each trip output and reset sequence.
What model-specific limitation must be checked for T8442?

The 30 kHz input limit and the tooth-count/RPM relationship must both be checked for the monitored rotor.

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