ICS Triplex T8451 digital output module

• Brand
  ICS Triplex
• Model
  T8451
• Product Name
  Trusted TMR 24VDC Digital Input/Output Module
• Country of Origin
  United States
• HS Code
  85389000
• Dimensions
  150mm×110mm×40mm
• Weight
  0.75kg
• Operating Temperature
  -40°C to +70°C
• Storage Temperature
  -60°C to +115°C
• Power Supply
  24VDC
• Warranty
  12 month
• Product Status
  New and original

Electrical Input and Output Parameters

System Power Input: Operating voltage 20VDC to 32VDC; field operating tolerance 18VDC to 32VDC; transient voltage tolerance -1VDC to 40VDC.

Field Input: No field input channels. The module receives control logic commands via the system backplane bus, with no external signal input interface.

Digital Output Specifications: Equipped with 40 TMR-fault-tolerant digital output channels, divided into five isolated power banks (8 channels per bank). Each channel provides up to 2A sinking output current, allowing direct drive of solenoid valves and safety relays without intermediate relay amplification. Every channel supports real-time loop diagnostics, including open-circuit detection, short-circuit protection and load fault monitoring.

Core Product Features

The T8451 features full triplicated TMR voting circuitry on every output channel, enabling single fault tolerance and double fault safe state response. It integrates 1ms high-precision SOE timestamp function to record all safety state changes for audit and analysis. Five independent isolated power banks ensure localized fault isolation, so failures in one bank do not affect other normal operating channels. Full-range loop monitoring covers open circuit, short circuit and overload conditions for all field output loops. Its high-current 2A channel drive capability eliminates the need for external relay cabinets, simplifying safety loop architecture.

Product Advantages

Certified for SIL 3 safety integrity, the T8451 delivers reliable fail-safe output for critical ESD and process safety loops. High-density 40-channel design greatly improves SIS system channel capacity compared with conventional low-density I/O modules. Independent bank isolation architecture enhances system fault tolerance and reduces system-level downtime risks. Built-in SOE logging provides accurate event traceability, improving plant safety management and maintenance efficiency. Vibration-resistant fixed terminal design and wide-temperature industrial rating ensure long-term operational stability in harsh process industrial environments, lowering lifecycle maintenance and replacement costs.

Wiring and Installation Methods

Wiring Mode: The T8451 adopts bank-isolated fixed terminal wiring. Each of the five output groups uses independent terminal blocks to achieve electrical isolation between banks, preventing fault propagation and signal crosstalk across channels. Fixed screw terminals provide permanent vibration-resistant connection, suitable for long-term continuous operation in vibrating industrial sites. All field loops support full-time monitoring wiring for real-time circuit health diagnosis.

Installation Mode: Designed for Trusted system rack mounting with dedicated anti-lock vibration-proof latches. It also supports standard DIN rail mounting for flexible cabinet layout. The high-density strip structure optimizes multi-channel layout and reduces overall system cabinet occupancy.