Product Details
Overview
The 1785-MJ by Allen-Bradley is a dedicated memory module designed for PLC-5 systems, providing secure program backup and reliable data storage. Optimized for standard PLC-5 processors, it ensures consistent system operation and safeguards critical control programs.
Technical Specifications
-
Model: 1785-MJ
-
Module Type: Memory Module
-
Memory Capacity: 8K Words (6K SRAM usable)
-
Write Protection: Removable jumper for added data security
-
Primary Function: Program backup for PLC applications
-
Supported Processors: Standard PLC-5 series
-
Backplane Power Requirement: 2.5 A at 5 V DC
Compatibility
-
PLC-2/17 Series: 1772-LW, 1772-LWP
-
PLC-5 Series: 1785-LT (10), 1785-LT2 (12), 1785-LT3 (15), 1785-LT4 (25)
Environmental Conditions
-
Operating Temperature: 0° to 60° C (32° to 140° F)
-
Storage Temperature: –40° to 85° C (–40° to 185° F)
-
Relative Humidity: 5–95% (non-condensing)
Size & Weight
-
Dimensions: 2.18L x 1.73H x 0.69D in (55.4 x 43.9 x 17.4 mm)
-
Weight: Approx. 0.34 kg
Additional Features
-
Designed for secure program backup in PLC-5 systems
-
No removal under power (RIUP) capability
-
Compact form factor fits standard PLC-5 backplane
-
Reliable SRAM ensures stable performance under industrial conditions
Applications
-
Industrial PLC-5 automation systems
-
Program backup and memory extension
-
Control system redundancy and protection
FAQ
Q: Can this module be used in PLC-5 processors of all memory sizes?
A: Yes, it is compatible with all standard PLC-5 series processors.
Q: Does it support hot-swapping?
A: No, removal under power is not supported.
Q: What type of memory does it use?
A: It uses SRAM with write-protection jumper for secure backup.
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
Redundant Automation Systems: Ensuring Continuous Uptime in Critical Control Infrastructure
System reliability directly determines operational profitability across high stakes process industries. Modern industrial automation platforms must eliminate single points of failure to prevent catastrophic shutdowns. Deploying fault tolerant architecture safeguards complex facilities against unexpected hardware glitches, network disruptions, and maintenance outages.
Understanding Types of Noise in Electronic Circuits and Control Systems
Signal integrity directly determines measurement accuracy and loop stability across industrial automation environments. Electronic noise introduces unwanted stochastic interference into analog loops, sensor feedback lines, and digital fieldbus networks. Understanding how intrinsic electronic noise and external electromagnetic interference manifest allows control engineers to optimize signal conditioning and shield sensitive instrumentation effectively.
Why 24V DC Power Supplies Standardize Modern Industrial Automation
Industrial control cabinets worldwide rely on 24V DC as the universal power standard for field instrumentation, sensors, and controllers. Walk into any manufacturing plant, and you will find PLCs, human-machine interfaces (HMIs), and smart actuators running on extra-low voltage DC. Standardizing on 24V DC enhances operational safety, lowers cabinet footprint, and maintains steady control performance across factory networks.