Product Introduce
1769 – OF8V is an 8-channel analog voltage output module of the CompactLogix series. It has 8 single-ended analog voltage output channels and supports multiple output ranges of ±10V DC, 0 – 10V DC, 0 – 5V DC, 1 – 5V DC. The full-scale range corresponds to ±10.5V DC, -0.5 – 10.5V DC, etc.; the digital resolution is up to 16 The bits are signed (bipolar), the current consumption is 145mA at 5.1V, 125mA at 24V, the maximum heat dissipation power is 2.16W; the maximum conversion rate of the whole channel is 5.0ms, the 63% step response time is less than 2.9ms, the maximum load current of a single channel is 10mA; it has an isolation voltage resistance of 500V AC / 710V DC for 1 minute.
Parameter
| Comparison Dimension | 1769-OF8V | 1769-OF8C | 1769-OF4CI |
|---|---|---|---|
| Core Output Type | Voltage output only, supports multiple voltage ranges such as ±10V DC, 0-10V DC | Current output only, supports two current signals: 0-20mA, 4-20mA | Flexible configuration for voltage or current output; voltage supports ±10V etc., current supports 4-20mA etc. |
| Number of Channels | 8 single-ended output channels | 8 output channels | 4 single-ended output channels |
| Key Electrical Parameters | 5.1V/145mA, 24V/125mA, heat dissipation power 2.16W | Current consumption: 110mA at 5V, no 24V current consumption specified | Rated operating voltage 30V DC, with 40mA overcurrent protection |
| Core Advantages | Compatible with various voltage-controlled devices; multi-voltage range adapts to low-power, high-precision voltage-driven scenarios | Current signal has strong anti-interference ability, suitable for long-distance transmission scenarios; compatible with current-type actuators like valves and pumps | Flexible configuration, supports seamless integration of multi-layer networks; suitable for distributed control systems and scenarios requiring both voltage and current control |
| Typical Application Scenarios | Controlling servo motor speed, small heater power, etc. | Driving regulating valves, industrial pumps installed over long distances, etc. | Complex control loops in industries such as steel and petrochemicals; remote control scenarios across networks |
| Comparison Dimension | 1769-OF8V | 1769-IF8 |
|---|---|---|
| Core Function | Converts digital signals from the controller into analog voltage signals for output, driving external actuators | Converts analog signals (voltage/current) from sensors into digital signals and transmits them to the controller for data processing |
| Signal Compatibility Range | Voltage signal output only | Accepts voltage signals such as ±10V DC and current signals such as 4-20mA |
| Electrical Consumption | 5.1V/145mA, 24V/125mA | 5V/120mA, 24V/70mA, heat dissipation power 3.64W |
| Core Role | Executes control commands and drives equipment operation | Collects on-site data and provides a basis for control decisions |
| Collaborative Scenarios | After 1769-IF8 collects data from temperature sensors, the controller calculates adjustment parameters, and 1769-OF8V outputs corresponding voltage signals to control cooler power | – |
FAQ:
1.How will the actual resolution and accuracy of the 1769-OF8V differ at different voltage output ranges (such as ±10V DC, 0-5V DC)?
| Voltage Output Range | Effective Resolution | Note |
|---|---|---|
| ±10V DC | 15.89 bits | Bipolar, highest resolution, suitable for high-precision positive and negative control |
| 0-10V DC | 14.89 bits | Unipolar, 1-bit lower resolution, used for conventional positive voltage drive |
| 0-5V DC | 13.89 bits | Small-range unipolar, ideal for low-voltage precision control |
| 1-5V DC | 13.57 bits | Offset unipolar, lowest resolution, adapted to reference offset scenarios |
2.Can the 1769-OF8V directly adapt to all controller models in the CompactLogix series? Are there firmware version restrictions?
- Adaptation scope: It can be seamlessly connected to the 1769 series CompactLogix controller through the 1769 backplane, and can also be adapted to some 1768 series CompactLogix controllers. However, for the more special customized or early niche models in the CompactLogix series, they may not be directly adaptable due to differences in backplane communication protocols. In this case, special adapters must be used for conversion before they can be used.
- Firmware version restrictions: There is no separate firmware version requirement for the 1769-OF8V module, but it must match the version of the controller’s firmware and programming software. For example, when used with mainstream 1769 series controllers such as 1769-L31 and 1769-L35CR, if the controller firmware version is too low, module recognition failure or abnormal channel configuration may occur. It is usually recommended to upgrade the CompactLogix controller firmware to version v20 and above, and use it with the corresponding version of Studio 5000 programming software to ensure that the parameter configuration, signal output and other functions of the module’s 8 analog output channels are stably realized.
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