Product Introduction
The Allen-Bradley 1756-OW16IK is a ControlLogix isolated relay output module engineered for demanding industrial environments. As part of the ControlLogix family, this 16-point module delivers individually isolated outputs that ensure clean signal separation and reliable switching for a wide range of field devices.
Whether you are upgrading an existing line or building a new control system, the 1756-OW16IK provides the flexibility and robustness required for mission-critical automation.
Key Features & Benefits
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16 individually isolated outputs – prevents cross-talk and improves system reliability.
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Wide operating voltage range – supports 10-265 VAC and 5-150 VDC, covering diverse applications.
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Multiple current ratings – 2 A, 0.5 A, and 0.25 A output current options for various loads.
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Fast response – maximum output delay time of 10 ms ensures timely switching.
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Compact design – occupies only one slot in the ControlLogix chassis.
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Conformal coating – protects the module from moisture, dust, and corrosive atmospheres.
Technical Specifications
| Specification |
Value |
| Manufacturer |
Rockwell Automation |
| Brand |
Allen-Bradley |
| Part Number |
1756-OW16IK |
| Series |
ControlLogix |
| Module Type |
Isolated Relay Output Module |
| Outputs |
16-Point Individually Isolated |
| Operating Voltage |
10-265 Volts AC, 5-150 Volts DC |
| Output Current |
2, 0.5, 0.25 Amps |
| Maximum Output Delay Time |
10 milliseconds |
| Contact Output |
13 N.O. |
| Power Dissipation (Max) |
4.5 Watts at 60 Celsius |
| Backplane Current at 5 Volts |
150 milliamps |
| Backplane Current at 24 Volts |
150 milliamps |
| Removeable Terminal Blocks |
1756-TBCH, 1756-TBS6H |
| Isolation Voltage |
50 Volts Continuous |
| Enclosure |
None |
Applications
The 1756-OW16IK excels in applications where discrete outputs must switch AC or DC loads with high isolation. Typical uses include:
- Motor starters and contactor control in manufacturing lines.
- Valve actuation in process control systems.
- Alarm and indicator lamp driving in panel applications.
- Interfacing with legacy equipment that requires relay-level signals.
Its wide voltage range and multiple current ratings make it a versatile choice for both new installations and retrofits.
Installation & Setup
Install the 1756-OW16IK into any ControlLogix chassis slot. Ensure the chassis power is off before insertion to avoid electrical arcing, especially in hazardous locations. Use the recommended removable terminal blocks (1756-TBCH or 1756-TBS6H) for secure field wiring. The module requires one slot and draws 150 mA from both the 5V and 24V backplane supplies.
For remote mounting, the module can be placed in a remote chassis connected via EtherNet/IP, ControlNet, or other networks supported by ControlLogix.
Maintenance & Reliability
Regularly inspect the module for signs of overheating, loose connections, or contamination. The conformal coating helps resist moisture and chemical attack, but periodic cleaning with approved solvents is recommended. The expected contact life is 300 kilocycles resistive and 100 kilocycles inductive, ensuring long-term reliability. Monitor the module's health indicators for real-time status and fault reporting.
Compatibility & Integration
The 1756-OW16IK is designed for ControlLogix 5580 controllers and other Logix5000 controllers. It supports rack-optimized and direct connections, allowing flexible I/O mapping. The module can be used in the same chassis as the controller or remotely over EtherNet/IP, ControlNet, or other networks. It requires either a Bulletin 1492 wiring interface module (IFM) or a removable terminal block for field wiring.
Selection Guide
When selecting the 1756-OW16IK, verify your system's voltage and current requirements against the module's ratings. Ensure you have the correct terminal blocks (1756-TBCH or 1756-TBS6H) and, if needed, a 1492 IFM. Confirm chassis slot availability and backplane current capacity. For expert assistance and fast delivery, PLC Source PRO is your trusted supplier for genuine Allen-Bradley automation parts.