1769-IM1212 Allen-Bradley 240VAC digital input module
Manufacturer: Allen Bradley
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Part Number: 1769-IM12
Condition：New with Original Package
Product Type: Digital I/O Cards
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Allen-Bradley 1769-IM12 Compact Digital Input Module
The Allen-Bradley 1769-IM12, also cataloged as the 1769-IM12 Compact Input Module, operates as a dedicated hardware component for high-voltage AC discrete signal acquisition within CompactLogix and MicroLogix 1500 systems. The device converts 200/240 V AC line level sensor responses into internal logic states via an isolated bus boundary interface. A multi-point termination field uses internally connected common return lines to group the field circuitry into a single parallel wiring node.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-IM12 |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.3 kg |
| Dimensions | 118 x 35 x 87 mm |
| Operating Temp | 0 to +60 deg C |
| Storage Temp | -40 to +85 deg C |
| Power Consumption | 3.65 W maximum heat dissipation |
| Channels | 12 discrete AC inputs (1 group of 12) |
| Voltage Category | 200/240 V AC |
| Operating Voltage Range | 159 to 264 V AC |
| Input Frequency Range | 47 to 63 Hz |
| Input Current Loading | 100 mA nominal / 12 mA maximum inrush |
| Input Impedance | 27 kOhm @ 50 Hz / 23 kOhm @ 60 Hz |
| Backplane Current Draw | 100 mA @ 5 VDC |
| Isolation Voltage | 132 V AC working voltage (tested at 1836 V AC for 1 s) |
| Signal Propagation Delay | 20 ms nominal ON/OFF delay |
| Mounting Base | DIN-rail or panel chassis attachment |
| Terminal Block | 1769-RTBN18 removable assembly |
| Certifications | CE, UL, CSA, IEC Class II Reinforced Insulation |
Backplane Bus Communication and I/O Density Scaling
The internal logic card coordinates status frames across the 1769 system bus, utilizing a fixed 100 mA current draw from the 5 VDC rail to drive the optical isolation circuitry. The physical architecture scales local I/O density by mapping all 12 AC input channels onto a single logix data word without generating configuration latency. Firmware flash compatibility rules require proper alignment within the standard chassis configuration layout to prevent backplane communication velocity degradation when mixing digital modules alongside process controllers.
Frequently Asked Questions
Q: How does the internal common arrangement affect field wiring layouts?
A: The hardware groups all 12 input points into a single shared return node, meaning all field devices wired to this card must operate off the same AC distribution phase.
Q: Can the 1769-IM12 module withstand sudden high-voltage line spikes?
A: The input-point-to-bus insulation barrier is verified by a dielectric test of 1836 V AC for 1 second, providing IEC Class II reinforced insulation against electrical transients.
Q: What power supplies supply the internal voltage rails for this hardware?
A: The backplane power allocation requires system integration with 1769-PA2, 1769-PB2, 1769-PA4, or 1769-PB4 power modules.
Field Installation Guidelines
- Shielding and Separation: Route high-voltage AC field lines through independent wire ducts, maintaining physical distance from low-voltage DC signals and serial data cables.
- Torque Specifications: Secure field wires into the 1769-RTBN18 terminal block using 22 to 14 AWG solid or 22 to 16 AWG stranded copper wire, clamping screws to specified industrial tight tolerances.
- DIN-Rail Grounding: Ground the mounting rail to the enclosure master ground lug to verify that common-mode electrical noise drains correctly away from the internal logic bus.