Description:
The Allen-Bradley 2085-OW16 is a 16-point relay output expansion module for the Micro800 series programmable controllers. It features 16 Form A (SPST-NO) mechanical relays, each capable of switching up to 2 A at 250V AC or 30V DC. Designed for right-side expansion of Micro850 and Micro870 PLCs, it provides flexible mixed AC/DC load control for small to mid-sized automation systems, with individual status LEDs and a removable terminal block for easy installation.
Application Scenarios:
In a Taiyuan-based small conveyor sorting system, the 2085-OW16 is mounted to the right of a Micro850 controller. It directly drives 24V DC solenoid valves (for pneumatic pushers) and 220V AC indicator lamps from the same module, eliminating the need for external interposing relays. The module’s mixed voltage capability simplifies the control cabinet layout and reduces component costs for the OEM machine builder.
Parameter:
| Main Parameters | Value/Description |
|---|---|
| Product Model | 2085-OW16 |
| Manufacturer | Rockwell Automation (Allen-Bradley) |
| Product Series | Micro800 Expansion I/O |
| I/O Type | Digital Output (DO) |
| Number of Points | 16 points |
| Output Type | Mechanical Relay (Form A, SPST-NO) |
| Contact Rating | 2 A per point (Resistive Load) |
| Voltage Range | 5–250V AC / 5–30V DC (per point) |
| Isolation | Channel-to-Channel & Channel-to-Backplane (1500V AC) |
| Status Indicators | 16 Green LEDs (One per output channel) |
| Connection | Removable Terminal Block (RTB), 22–14 AWG |
| Backplane Power | 5V DC (from controller), typically ≤ 160 mA |
| Operating Temperature | -20 °C to +65 °C |
| Compatible Controllers | Micro850, Micro870 (via right-side expansion bus) |
| Lifecycle Status | Active / Standard |
Technical Principles and Innovative Values:
The 2085-OW16 leverages the simplicity and versatility of electromechanical relays for flexible system design.
- Innovation Point 1: True Mixed AC/DC Load Support. Unlike transistor output modules (e.g., 2085-OB16) that are locked to DC polarity, the relay contacts in the 2085-OW16 are voltage-agnostic. This allows a single module to control a mix of 24V DC solenoids and 220V AC contactor coils simultaneously, providing exceptional wiring flexibility for cost-sensitive applications.
- Innovation Point 2: High Isolation and Simplicity. The module provides 1500V AC optical isolation between the field load circuits and the controller logic. This inherent isolation protects the sensitive Micro800 CPU from high-voltage transients and ground loops, a critical feature in electrically noisy industrial environments like those found in Shanxi’s manufacturing plants.
- Innovation Point 3: Hot-Swap Terminal Block. The Removable Terminal Block (RTB) allows pre-wiring of field devices on the bench before snapping the module into place. This drastically reduces on-site commissioning time and simplifies maintenance—if a module fails, the wiring can be transferred to a new unit in seconds without touching screw terminals.
