Overview
Input Configuration and Signal Operation
The 1769-IM12 provides 12 AC input points in one group. All points share internally connected common terminals. Each channel monitors an external AC signal and sends its ON or OFF status to the controller.
Furthermore, the module has a 20 ms input delay for both ON and OFF transitions. This delay determines how quickly the module detects a change in the input signal. As a result, the controller receives input status after the specified response time.
Electrical Specifications
The module supports the 200/240 VAC input category and operates within a voltage range of 159-265 VAC at 47-63 Hz. Therefore, it handles high-voltage AC signals rather than 30 VAC or 24 VDC signals.
The minimum ON-state voltage is 159 VAC, while the maximum OFF-state voltage is 40 VAC. These voltage limits help the module identify valid input states. In addition, the maximum OFF-state current is 2.5 mA, and the maximum inrush current is 250 mA.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-IM12 |
| Brand | Allen-Bradley |
| Product Line | Compact I/O |
| UPC | 662468992824 |
| Module Type | AC Digital Input Module |
| Number of Inputs | 12 |
| Input Voltage Category | 200/240 VAC |
| Operating Voltage Range | 159-265 VAC |
| Frequency | 47-63 Hz |
| Input Delay (ON) | 20 ms |
| Input Delay (OFF) | 20 ms |
| On-State Voltage (Minimum) | 159 VAC |
| Off-State Voltage (Maximum) | 40 VAC |
| Off-State Current (Maximum) | 2.5 mA |
| Inrush Current (Maximum) | 250 mA |
| Input Impedance (Maximum) | 27 kOhm at 50 Hz; 23 kOhm at 60 Hz |
| Bus Current Draw | 100 mA at 5.1 VDC |
| Maximum Heat Dissipation | 3.65 W |
| Input Point-to-Bus Isolation | 1836 VAC for 1 s or 2596 VDC for 1 s |
| Power Supply Distance Rating | 8 modules |
| Wiring | Copper |
| Solid Wire Size | 22-14 AWG |
| Stranded Wire Size | 22-16 AWG |
| Wire Temperature Rating | 90 deg C |
| Enclosure Type | Open-style |
| Approximate Weight | 0.61 lb (0.28 kg) |
| Dimensions (H x W x D) | 4.65 x 1.38 x 3.43 in. |
| Country of Origin | Malaysia |
Installation and Wiring Considerations
The 1769-IM12 uses internally connected AC common terminals for its 12 input points. Therefore, installers should follow the specified wiring arrangement when connecting field devices. Also, do not use the unused NC terminals as electrical connection points.
The module has a power supply distance rating of 8. This means you must install it within eight module positions of the power supply or controller. In addition, use copper conductors that meet the specified wire sizes and temperature rating.
Frequently Asked Questions
Q: Is the 1769-IM12 compatible with 24 VDC input signals?
A: No. The 1769-IM12 is a 200/240 VAC digital input module. It operates within 159-265 VAC, so it does not support 24 VDC input signals.
Q: How many input channels does the 1769-IM12 provide?
A: It provides 12 AC input channels in one group. All 12 points share internally connected common terminals.
Q: What is the maximum distance from the power supply?
A: The module has a power supply distance rating of 8. Therefore, you must install it within eight module positions of the power supply or controller
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