Triconex 3805E Analog Output Module

The Triconex 3805E Analog Output Module delivers precise and reliable analog signals with its Triple Modular Redundancy (TMR) design. This module ensures fault tolerance, supports diagnostics, and provides hot-spare capability, making it vital for safety-critical systems.

Key Features

TMR Design Ensures Robust Operation
- Three channels process signals independently, and the system selects the healthiest channel to drive outputs.
- Non-selected channels remain isolated, enhancing safety and preventing interference.
Active Diagnostic Monitoring
- The module uses current loopback circuits to continuously verify signal accuracy and presence, even without a load.
- Ongoing diagnostics identify faults in circuits or channels, triggering the Fault Indicator and chassis alarm when issues arise.
- Even with up to two faulty channels, the module continues operating reliably.
Open Loop Detection with Immediate Feedback
- The LOAD Indicator alerts users when the module fails to drive current to any output, reducing troubleshooting time.
Redundant Loop Power Guarantees Continuity
- Two external power sources supply the module, ensuring uninterrupted operation.
- PWR1 and PWR2 indicators confirm the presence of power from both sources, adding visibility and assurance.
Hot-Spare Capability for Reduced Downtime
- Technicians can replace faulty modules while the system remains online, ensuring minimal disruption to operations.
Mechanical Keying Enhances Safety
- The module includes a mechanical keying system, which prevents incorrect installation and protects the setup.

Specifications

Specification	Details
Model Number	3805E
Type	TMR
Output Current Range	4-20 mA (+6% overrange)
Number of Outputs	8
Point Isolation	No, commoned return, DC coupled
Resolution	12 bits
Output Accuracy	<0.25% (within 4-20 mA range) of full-scale range (FSR: 0-21.2 mA)
Operating Temperature	32°F to 140°F (0°C to 60°C)
External Loop Power	Nominal: +24 VDC; Maximum: +42.5 VDC (reverse voltage protected)
Output Loop Power Requirements
	– 250 Ω Load: >20 VDC (1 amp min)
	– 500 Ω Load: >25 VDC (1 amp min)
	– 750 Ω Load: >30 VDC (1 amp min)
	– 1000 Ω Load: >35 VDC (1 amp min)
Over-range Protection	Continuous up to +42.5 VDC
Switch Time on Leg Failure	<10 ms (typical)
Diagnostic Indicators	PASS, FAULT, ACTIVE, LOAD, PWR1, PWR2
Color Code	Pea Green

Applications

Process Control Systems
Industries such as oil and gas, power generation, and chemical processing benefit from the module’s reliable analog output capabilities.
Turbomachinery Operations
The 3805E Module performs effectively in high-demand environments and complements the 3806E High Current Module.
Safety-Critical Applications
Its self-diagnostic abilities and TMR design make the module essential for systems requiring precision and reliability.