1. General Description

2. Key Features

• 8 digital output channels, simplex (non‑redundant)

• Commoned output configuration (common return)

• Designed for direct use with T9451 (8‑Ch Digital Output Module, Simplex)

• Output rating: 24 VDC, 0.5 A per channel (resistive load)

• Built‑in channel‑wise fuse protection (field fault isolation)

• LED status indicators per channel (On / Fault)

• EMI/RFI filtering for noise immunity

• Screw terminals for field wiring (16 AWG max)

• Conformal coated PCB for harsh industrial environments

• Hot‑swap compatible (online replacement)

• SIL 2 certified per IEC 61508 (system level)

3. Electrical Specifications

Output

• Number of Channels: 8

• Redundancy: Simplex (non‑redundant)

• Configuration: Commoned (common return)

• Voltage Range: 20.4–32 VDC (nominal 24 VDC)

• Current Rating: 0.5 A per channel (resistive)

• Maximum Total Current: 4 A (all channels ON)

• Fusing: 500 mA fast‑blow fuse per channel

• Leakage Current: ≤ 100 µA (OFF state)

• On‑State Voltage Drop: ≤ 1 VDC

Isolation & Protection

• Backplane to Field: 500 VDC isolation

• Surge Protection: TVS diode per channel

• EMI Filter: Low‑pass filter per channel

• Fault Detection: Overcurrent / short‑circuit (fuse blow)

Backplane Interface

• Supply Voltage: 18–32 VDC

• Maximum Current: 150 mA

• Power Dissipation: ≤ 2 W

4. Mechanical Specifications

• Form Factor: Single‑width 6U Termination Assembly (AADvance standard)

• Dimensions (W × H × D): 132 mm × 126 mm × 22 mm

• Weight: Approximately 0.89 kg

• Terminals: Screw‑type (field wiring)

• Mounting: T9300 I/O Base or T9100 System Chassis

• Cooling: Natural convection

5. Environmental Specifications

• Operating Temperature: −40 °C to +70 °C

• Storage Temperature: −40 °C to +85 °C

• Humidity: 5% to 95% RH, non‑condensing

• Pollution Degree: PD2

• Protection: Conformal coated PCB

6. Safety & Approvals

• Safety Standard: IEC 61508

• Safety Integrity Level: SIL 2 (system‑level certified)

• Approvals: CE, UL, CSA, ATEX, IECEx, TÜV

7. Compatibility & Ordering Information

Compatible Modules

• T9451: 8‑Channel Digital Output Module, Simplex

• T9300: 3‑Way I/O Base Unit

• T9100: AADvance System Chassis

Ordering Codes

• T9851: 8‑Ch Digital Output TA, Simplex, Commoned

• T9451: 8‑Ch Digital Output Module, Simplex

• T9300: I/O Base, 3‑Way

8. Typical Application

• SIL 2 safety instrumented systems

• Emergency Shutdown (ESD) auxiliary outputs

• Fire and Gas (F&G) alarm outputs

• Solenoid valves, relays, and contactors

• Non‑critical process control outputs