TMR 24 / 48V DC, Digital Output module, interfaces to 40 field devices. The module performs triple diagnostic tests, including measurements of current and voltage on each portion of the voted output channel.

Tests are also performed for stuck-on and stuck-off failures. Fault tolerance is achieved through a Triple Modular Redundant (TMR) architecture within the module for each of the 40 output channels.

Automatic line monitoring of the field device is provided. This feature enables the module to detect both open and short circuit failures in field wiring and load devices.

The module provides onboard Sequence of Events (SOE) reporting with a resolution of 1ms. An output state change triggers an SOE entry. Output states are automatically determined by voltage and current measurements on board the module.

- T8461, T8461C, P8461
- T8461 Digital Output Module

Features
- 40 Triple Modular Redundant (TMR) output channels per module.
- Comprehensive, automatic diagnostics and self-test.
- Automatic line monitoring per channel to detect open circuit and short circuit field wiring and load faults.
- 2500V dc optical isolation barrier.
- Automatic over-current protection (per channel), no fuses required.
- On-board Sequence of Events (SOE) reporting with 1ms resolution.
- Module can be hot-replaced on-line using dedicated Companion (adjacent) Slot or SmartSlot (one spare slot for many modules) configurations.
- Front panel output status LEDs for each channel indicate output status and field wiring faults.
- Front panel module status LEDs indicate module health and operational mode (Active, Standby, Educated)
- TUV Certified IEC 61508 SIL 3
- Outputs are powered in isolated groups of eight.
- Each power group can be of a different voltage