Product Details
Overview
The Allen-Bradley 1771-IMD/B is a versatile digital input module designed to support both AC and DC signals. It provides reliable monitoring of 16 input channels and is suitable for diverse control applications requiring fast, accurate signal detection and robust electrical performance.
Technical Specifications
-
Manufacturer: Allen-Bradley
-
Model & Part Number: 1771-IMD/B
-
Category: PLC Modules
-
Number of Inputs: 16
-
Nominal Input Voltage: 220V DC, 220V AC at 50–60 Hz
-
Nominal Input Current: 0.6 mA at 220V DC, 9.9 mA at 220V AC (50 Hz), 10.4 mA at 220V AC (60 Hz)
-
On-State Voltage Range: AC 184–250V, DC 166–230V
-
Maximum Off-State Voltage: 92V AC or DC
-
Maximum Off-State Current: 3 mA at 92V AC, 0.25 mA at 92V DC
-
Minimum On-State Current: 8.7 mA at 184V AC (50 Hz), 0.43 mA at 166V DC
-
Input Signal Delay: OFF to ON: 15 ± 8 ms; ON to OFF: 172 ± 56 ms
-
Input Impedance: 0.15 μF capacitor in parallel with 21.2 kΩ at 50 Hz; 370 kΩ resistor in series with 1 kΩ
-
Backplane Current: 250 mA at 5V DC ±5%
-
Power Dissipation: Minimum 1.3 W, Maximum 5.8 W
-
Thermal Dissipation: Minimum 4.5 BTU/hr, Maximum 19.8 BTU/hr
-
Operating Temperature: 0–60°C (32–140°F)
Applications
-
Monitoring AC and DC signals in PLC control systems
-
Input interface for machinery and process automation requiring precise digital detection
-
Systems where rapid and reliable signal processing is critical
FAQ
Q: How many input channels does the 1771-IMD/B support?
A: The module supports 16 digital input channels for AC or DC signals.
Q: What is the acceptable input voltage range?
A: AC: 184–250V, DC: 166–230V, with off-state voltage up to 92V.
Q: Can it handle fast signal changes?
A: Yes, the OFF to ON delay is 15 ± 8 ms, and the ON to OFF delay is 172 ± 56 ms for both AC and DC inputs.
Q: What are the environmental operating limits?
A: The module operates within 0–60°C (32–140°F), suitable for standard control cabinet installations.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Preventing Emergency Stop Spurious Trips in Industrial Control Systems
Emergency Stop pushbuttons use Normally Closed contacts for fail-safe safety, but mechanical wear can cause costly spurious trips. This technical guide examines E-Stop contact failure root causes, redundant hardware setups, PLC logic monitoring, and maintenance strategies to maximize plant availability.
Why 24V DC Is the Universal Standard for Industrial Automation Power Supplies
Industrial manufacturing requires continuous uptime to prevent equipment damage. Unlike AC power, 24V DC circuits seamlessly integrate with UPS units and battery banks. During main grid failures, a 24V DC backup system instantly maintains PLC memory, instrument loops, and critical safety valves without interruption.
Site Acceptance Testing (SAT) for PLC Control Systems: An Engineering Execution Guide
The Site Acceptance Test (SAT) represents the definitive handover stage in industrial automation projects. While the Factory Acceptance Test confirms cabinet hardware assembly off-site, the SAT validates real-world performance under live site conditions. Consequently, a structured execution strategy prevents equipment damage and guarantees seamless integration into plant operations.