Overview
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-OF8C |
| Brand | Allen-Bradley |
| Product Type | Analog Output Module |
| Product Line | CompactLogix |
| UPC | 662468861625 |
| Number of Outputs | 8 |
| Output Configuration | Single-Ended |
| Output Current Ranges | 0 to 20 mA or 4 to 20 mA |
| Bus Current Draw at 5 VDC | 145 mA |
| Bus Current Draw at 24 VDC | 185 mA |
| Maximum Heat Dissipation | 2.69 W |
| Maximum Conversion Rate (All Channels) | 5 ms |
| Open-Circuit Protection | Supported |
| Short-Circuit Protection | Supported |
| Maximum Short-Circuit Current | 21 mA |
| Output Overvoltage Protection | Supported |
| Weight | 0.26 kg (0.56 lbs) |
Analog Output Configuration
The 1769-OF8C provides eight analog current output channels. Each channel supports either a 0-20 mA or 4-20 mA signal range, allowing the module to transmit current-based control references to compatible field devices.
For example, a 4-20 mA output can represent a proportional control value, with 4 mA as the lower range and 20 mA as the upper range. The selected output range should match the receiving device’s signal requirements.
Protection and Electrical Characteristics
The module incorporates open-circuit, short-circuit, and output overvoltage protection. These features help protect the output circuitry when field wiring or connected loads experience electrical faults.
Furthermore, the module draws current from both the 5 VDC and 24 VDC system buses. These values should be included when calculating the available power budget for the CompactLogix system.
Frequently Asked Questions
Q: How many analog output channels does the 1769-OF8C provide?
A: It provides eight single-ended analog current output channels. Each channel supports the specified 0-20 mA or 4-20 mA operating range.
Q: What is the maximum conversion rate of the 1769-OF8C?
A: The maximum conversion rate for all channels is 5 ms. This specification is relevant when evaluating analog output update requirements in a control application.
Q: What protection features does this module provide?
A: The 1769-OF8C supports open-circuit protection, short-circuit protection, and output overvoltage protection. Its specified maximum short-circuit current is 21 mA.
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