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The ProSoft Technology MVI56-S3964R is single-slot serial interface module for Rockwell 1756 ControlLogix PAC, implementing Siemens 3964R and RK512 point-to-point serial protocol. It enables bidirectional data exchange between ControlLogix and legacy Siemens PLC systems via serial connection, with BCC checksum for reliable data integrity. Technical data sourced directly from official ProSoft MVI56-S3964R datasheet & user manual. Supplied by SHLY-PLC, an independent industrial automation distributor; each unit undergoes visual inspection and functional testing before shipment for retrofit and spare replacement projects. Contact our team for compatibility verification.
Official Datasheet & User Manual Technical Parameters
| Technical Specifications | |
| Catalog Number | MVI56-S3964R |
| Hardware Type | 1756 Single-Slot 3964R / RK512 Serial Communication Module |
| Backplane Current Draw | 800mA @ 5.1 VDC, 3mA @24VDC |
| Application Serial Ports | 2 ports, jumper selectable RS232/RS422/RS485, full handshaking |
| Protocol Mode | 3964R or 3964R+RK512, BCC checksum |
| Max Message Size | 512 bytes per transfer |
| Environmental Ratings | |
| Operating Temperature | 0°C ~ +60°C (32°F ~ +140°F) |
| Storage Temperature | -40°C ~ +85°C (-40°F ~ +185°F) |
| Relative Humidity | 5% ~ 95% RH, Non-Condensing |
| Shock / Vibration | 30g operational /50g non-operational; 5g vibration 10Hz~150Hz |
| Agency Certifications | |
| cULus | UL508, Class I Div 2 Groups A,B,C,D T5 |
| ATEX | II 3 G Ex nA nL IIC T5 X |
| Compliance | CE, RoHS |
The MVI56-S3964R is legacy serial gateway for 1756 ControlLogix to communicate with Siemens S5 controllers over 3964R / RK512 protocol. It appears as standard I/O module to ControlLogix CPU, translating backplane tag data to serial 3964R frames. Two independent serial ports can run separate point-to-point connections. This listing is provided by an independent industrial-automation distributor; brand names and part numbers are used for product identification only.
Warranty: 12-month seller warranty provided by SHLY-PLC. See our Return Policy for coverage and claims.
A: MVI56-S3964R is ProSoft single-slot serial communication module for 1756 ControlLogix, implementing Siemens 3964R and RK512 point-to-point serial protocol to connect legacy Siemens S5 PLC.
A: Two application ports with jumper selectable RS232, RS422 or RS485, full hardware handshaking for modem or radio links.
A: Maximum 512 bytes per message, with configurable byte swap for different word ordering requirements.
A: RK512 enables Siemens DB block commands DB-SEND and DB-FETCH, allowing direct access to S5 data blocks over 3964R serial link.
MVI56-S3964R · Technical reference data · Independently supplied by SHLY-PLC
Standard International (tracked courier): delivered in 5–8 business days. In-stock items are processed within 2–4 business days. USD 25 flat rate on orders of $500 or less; free on orders over $500.
Express (DHL Express / FedEx International): upgraded expedited delivery in 2–4 business days. The Express surcharge is calculated at checkout based on destination and order weight.
Non-Stock / On-Order items ship on request: dispatch time is confirmed before your order — see our Shipping Policy. Remote-area and overweight surcharges, where applicable, are shown before checkout.
Every product is covered by a 12-month seller warranty provided by SHLY-PLC, effective from the date of delivery, against defects in materials and workmanship under normal use. Manufacturer or factory warranty service is not applicable, and extended warranty packages are not provided.
This warranty does not cover damage from misuse, improper installation, power surges, neglect, unauthorized repair, or normal wear and tear. See our Return Policy for warranty-claim instructions.
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