Description
Description
The Allen-Bradley 1769-ECL is a passive end cap terminator designed for use with CompactLogix and MicroLogix 1500 I/O systems. As a critical component for the 1769 backplane, this module is required to terminate the communication bus on the left side of the I/O bank. Proper termination is essential for maintaining signal integrity; without the 1769-ECL, the controller will fail to recognize or communicate with the I/O modules installed in the bank.
Features
- Provides necessary electrical termination for the 1769 backplane communication bus.
- Compact, open-style enclosure designed for space-efficient panel mounting.
- Compatible with all standard 1769 I/O modules, including communication adapters for EtherNet/IP and DeviceNet.
- Integrated tongue-and-groove design for secure mechanical connection to adjacent modules.
Technical Specifications
| Model |
1769-ECL |
| Product Line |
CompactLogix / MicroLogix 1500 |
| Module Type |
Left End Cap / Terminator |
| Bus Current Draw |
5 mA @ 5.1 VDC |
| Operating Temperature |
0 to 60 degC (32 to 140 degF) |
| Storage Temperature |
-40 to 85 degC (-40 to 185 degF) |
| Relative Humidity |
5% to 95% (non-condensing) |
| Operating Altitude |
Up to 2000 m (6562 ft) |
| Vibration |
5 g @ 10 to 500 Hz |
| Series |
A and B |
Installation Guidelines
- Ensure the system power is disconnected before installing or removing any 1769 I/O modules or terminators.
- Align the tongue-and-groove connectors on the 1769-ECL with the corresponding slots on the leftmost I/O module.
- Slide the end cap into position until it is firmly seated and locked, ensuring a reliable electrical connection to the backplane.
- Handle the module using standard ESD (Electrostatic Discharge) precautions to prevent damage to internal circuitry.
FAQ
Is the 1769-ECL required for all 1769 I/O banks?
Yes, every 1769 I/O bank requires an end cap terminator on the left side to complete the backplane communication signal. Failure to install this will result in system communication errors.
Can this be used on the right side of the I/O bank?
No, the 1769-ECL is specifically designed as a left-side terminator. Right-side termination is handled by the controller or the power supply module depending on the specific system configuration.
