3-AADC1 | Edwards Addressable Analog Circuit Module for EST3, 99 Sensors & 99 Modules
Edwards · PLCs & Industrial Controllers
Description The Edwards 3-AADC1 (part number 3-AADC1) is an addressable analog circuit module for EST3 systems, providing connectivity for up to 99 sensors and 99 modules on a single loop. It supports Class A (Style 7) or Class B (Style 4) wiring and includes ground fault detection at the loop level. The 3-AADC1 is discontinued by the manufacturer but remains a key replacement option for legacy EST3 installations. Technical Specifications Condition New/Never Used Surplus Brand Edwards Category PLCs/Machine Control Part Number 3-AADC1 Subcategory PLC Module/Rack Installation 1 LRM space Module Configuration 1 Addressable Analog Circuit Operating Current (Standby) 175 mA Operating Current (Alarm) 205 mA Circuit Capacitance 0.5 µF max, all branches Circuit Resistance 50 Ohms max Addressable Capacity 99 sensors + 99 modules Wiring Configuration Class A (Style 7) or Class B (Style 4) Ground Fault Limits 10k Ohms minimum Isolator Modules Allowed 6 maximum per circuit Devices Between Isolators 25 maximum Devices Between Panel & First Isolator 25 maximum Wire Size 12 AWG (2.5 mm²) max Termination Removable plug-in terminal strip Operating Environment 32°F to 120°F (0°C to 49°C), 93% RH non-condensing Agency Listings UL, ULC, CE, LPCB, EN54 (pending at discontinuation) Weight 0.66 lbs Information About 3-AADC1 The 3-AADC1 is a microprocessor-based module that installs in one local rail module (LRM) space within EST3 chassis assemblies. Designed as a direct replacement for the 3-AADC, it offers 100% backward compatibility with existing systems. The unit continuously monitors analog device outputs, reporting their status to the system CPU, while internal diagnostics aid in troubleshooting. With removable plug-in connectors, nonvolatile memory, and System Definition Utility programming, the 3-AADC1 simplifies installation, programming, and long-term maintenance of EST3 fire alarm systems. Key Features: Addressable Analog Circuit Module: Provides supervised communication with intelligent devices. Device Capacity: Supports up to 99 analog sensors and 99 input/control modules per circuit. Wiring Options: Compatible with Class A (Style 7) and Class B (Style 4) wiring topologies. Ground Fault Detection: Identifies ground faults by loop for faster troubleshooting. Backward Compatibility: Fully compatible with legacy 3-AADC systems. Nonvolatile Memory: Stores operating system software and data files securely. PC Programmable: Configurable with System Definition Utility for device address, type, sensitivity, and verification. Internal Diagnostics: Built-in test functions to support maintenance and fault isolation. Removable Terminals: Plug-in connectors simplify installation and replacement without tools. Supports UIM Modules: Provides hinged panel space for optional Control Display Modules. The 3-AADC1 delivers the reliability and supervision required for managing addressable loops in EST3 fire and security systems.
Brand: Edwards · Category: PLCs & Industrial Controllers
Key features
- Addressable Analog Circuit Module: Provides supervised communication with intelligent devices.
- Device Capacity: Supports up to 99 analog sensors and 99 input/control modules per circuit.
- Wiring Options: Compatible with Class A (Style 7) and Class B (Style 4) wiring topologies.
- Ground Fault Detection: Identifies ground faults by loop for faster troubleshooting.
- Backward Compatibility: Fully compatible with legacy 3-AADC systems.
- Nonvolatile Memory: Stores operating system software and data files securely.
- PC Programmable: Configurable with System Definition Utility for device address, type, sensitivity, and verification.
- Internal Diagnostics: Built-in test functions to support maintenance and fault isolation.
- Removable Terminals: Plug-in connectors simplify installation and replacement without tools.
- Supports UIM Modules: Provides hinged panel space for optional Control Display Modules.
Specifications
| Manufacturer part number | 3-AADC1 |
|---|---|
| Condition | New/Never Used Surplus |
| Brand | Edwards |
| Category | PLCs/Machine Control |
| Part Number | 3-AADC1 |
| Subcategory | PLC Module/Rack |
| Installation | 1 LRM space |
| Module Configuration | 1 Addressable Analog Circuit |
| Operating Current (Standby) | 175 mA |
| Operating Current (Alarm) | 205 mA |
| Circuit Capacitance | 0.5 µF max, all branches |
| Circuit Resistance | 50 Ohms max |
| Addressable Capacity | 99 sensors + 99 modules |
| Wiring Configuration | Class A (Style 7) or Class B (Style 4) |
| Ground Fault Limits | 10k Ohms minimum |
| Isolator Modules Allowed | 6 maximum per circuit |
| Devices Between Isolators | 25 maximum |
| Devices Between Panel & First Isolator | 25 maximum |
| Wire Size | 12 AWG (2.5 mm²) max |
| Termination | Removable plug-in terminal strip |
| Operating Environment | 32°F to 120°F (0°C to 49°C), 93% RH non-condensing |
| Agency Listings | UL, ULC, CE, LPCB, EN54 (pending at discontinuation) |
| Weight | 0.66 lbs |
| Product type | PLC Module/Rack |
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