Prosoft MVI56E-MCM Slave Communication Module

• Brand
  Prosoft
• Model
  MVI56E-MCM
• Product Name
  Slave Communication Module
• Place of Origin
  United States
• HS Code
  85389099
• Dimensions
  155mm × 110mm × 40mm
• Weight
  0.5kg
• Operating Temperature
  0℃ to +60℃
• Storage Temperature
  -40℃ to +85℃
• Power Supply
  24 VDC
• Warranty
  12 month
• Product Status
  New and original

Backed by abundant in-stock inventory and nearly 20 years of industry experience, our company stands as a leading player in the industrial control sector.We offer an extensive range of industrial control products covering numerous models. Should you have any other requirements, please feel free to contact us, and we will respond to you promptly.

Our main brand:

1.ABB's module cards, touch screens, controllers, etc., such as PP846 touch screen, IGCT starting with 5SHY, PM starting controller, AI, DO starting input/output module, SP starting Bailey module, etc

2.GE's module card CPUs, such as VMIC starter, IS200, IS215, IS400, IS420 series, etc,

3.Emerson's card components and EPRO probes, Westinghouse 1C series, Honeywell CC series, Schneider 140 series, Envision full series, Bentley 3500 series, Rexroth motors and drives, and Foxboro small modules.

1. Backplane Power Input

The module draws power exclusively from the ControlLogix 1756 rack backplane with no external power supply required.

Rated 5 VDC operating current: 800 mA

Auxiliary 24 VDC quiescent current: 3 mA

Galvanic isolation: 500 V isolation between serial ports and PLC backplane

Supports RIUP hot-swap function.

2. Physical Hardware I/O Interfaces

2.1 RJ45 Ethernet Configuration Port (E1)

10/100 Mbps Base-T auto-adaptive Ethernet interface.

Input functions: PC online configuration, firmware update, remote diagnostic access, IP assignment via ProSoft Discovery service.

Output functions: Real-time module status feedback, fault log export, network debugging data transmission.

Built-in auto crossover detection, with dedicated link & activity LED indicators.

2.2 Dual Independent Serial Ports (P1, P2, RJ45 with DB9 adapters)

Interface type configurable via jumpers: RS-232 / RS-422 / RS-485.

General communication parameters: Baud rate 110~115200 bps; data bits 7/8; stop bits 1/2; parity (None/Odd/Even); programmable RTS delay (0~65535 ms).

RS-232: ±12 V signal level; idle static current ≤5 mA; short-circuit protection current limited to 30 mA.

RS-422/485 differential bus: 1.5~5 V differential output voltage; driver short-circuit limit 250 mA; receiver input impedance ≥12 kΩ; common-mode voltage withstand range: -7 V ~ +12 V.

Each port is fitted with TX/RX running indicators.

2.3 Status & Display Output

4-character scrolling alphanumeric LED: Displays firmware version, IP address, port master-slave mode, running state and fault codes.

Fixed LED indicators: OK indicator for overall module health, APP indicator for application program status.

3. Logical Data I/O Mapping between PLC and Modbus Network

3.1 Input Buffer (Field Modbus Devices → ControlLogix Controller)

Maximum 10000-word 16-bit register buffer for receiving field device data.

Acceptable data types: 0x coil status, 1x discrete input, 3x input register, 4x holding register and 32-bit floating-point values.

3.2 Output Buffer (ControlLogix Controller → Field Modbus Devices)

Support single coil write, single register write, batch multi-coil write and batch multi-register write.

Master mode: Each serial port supports up to 100 independent command lists for automatic cyclic polling output.

Slave mode: Responds to read/write requests from external Modbus masters and uploads internal PLC tag data to the bus.

4. Auxiliary Backup & Protective Output

Built-in rechargeable lithium backup battery: Preserves real-time clock and configuration data for 21 days after power loss.

Hardware protection: Serial port short-circuit protection, backplane overvoltage & overcurrent surge suppression, industrial-grade EMC anti-interference design.

1. Backplane Installation & Power Connection

Power Supply Mode

The module has no external power terminals and is solely powered by the ControlLogix 1756 rack backplane. Insert the module into any vacant single slot and fasten the top and bottom latches securely.

Rated current draw: 800 mA @ 5 VDC; auxiliary quiescent current: 3 mA @ 24 VDC. 500 V galvanic isolation is provided between serial ports and the PLC backplane, and RIUP hot-swap function is supported.

Slot Configuration

Set the DIP switch on the rear panel of the module to match the exact slot number configured in Studio 5000 project.

2. Overview of Interfaces & Jumper Settings

E1: RJ45 Ethernet configuration port

P1, P2: Two independent serial ports, matched with RJ45-to-DB9 male adapters; jumpers beside each port select RS232 / RS422 / 2-wire RS485 mode.

Jumper rules:

Jumpers on pins 2-3 only: RS232 mode (point-to-point short-distance communication)

Jumpers on pins 1-2 only: RS422 / 4-wire full-duplex RS485

Jumpers on pins 1-2 and 3-4 simultaneously: 2-wire half-duplex RS485 (standard Modbus RTU application)

3. Wiring for E1 Ethernet Port

Specification: 10/100 Mbps auto-negotiation Base-T Ethernet, automatic crossover cable detection.

Cable: Standard Cat5e twisted-pair Ethernet cable.

Connection: One end connects to the module E1 port, the other connects to a PC; configure the PC IP address within the same network segment as the module.

Application: Online configuration, firmware upgrade, remote diagnosis and maintenance.

4. RS232 Wiring (Point-to-Point Debugging)

RJ45 Pin Definition

Pin 2 = TXD (Transmit Data), Pin 3 = RXD (Receive Data), Pin 5 = GND (Signal Ground)

Wiring Rules

PC direct connection: Cross wiring — Module TXD connects to device RXD, module RXD connects to device TXD, GND terminals are interconnected.

Modem connection: Straight wiring — TXD to TXD, RXD to RXD.

Limitation: Maximum transmission distance 15 m, only for one-to-one debugging, not for multi-node networking.

5. 2-Wire RS485 Wiring (Mainstream Industrial Modbus Application)

RJ45 Pin Definition

Pin 1 = Data+ (A), Pin 8 = Data- (B), Pin 5 = GND (optional signal ground)

Wiring Specifications

Adopt hand-in-hand bus topology; star branching wiring is prohibited.

Uniform polarity for all slave nodes: A connects to A, B connects to B; reversed polarity will cause communication failure.

Install a 120 Ω terminating resistor at the first and last nodes of the bus; no resistors on intermediate devices.

Recommended cable: Shielded twisted pair cable; maximum distance: 1200 m at 9600 baud rate.

Single-point common grounding at both ends of the bus to eliminate common-mode voltage interference.

6. 4-Wire Full-Duplex RS422 Wiring

Pin 1 = TX+, Pin 8 = TX-, Pin 2 = RX+, Pin 3 = RX-, Pin 5 = GND

Connection method: Transmitter TX+ connects to receiver RX+, TX- connects to receiver RX-. Separate transmit and receive circuits for full-duplex transmission, rarely used for Modbus networking.

Frequently Asked Questions (FAQ)

1.How fast will you reply to my inquiry?

We process all inquiries efficiently and will respond promptly once we receive your message.

2.Do you carry large inventory of industrial control parts?

We maintain massive ready stock of mainstream automation spare parts to shorten lead times.

3.Can you source discontinued or obsolete PLC & DCS modules?

Absolutely.
We specialize in sourcing hard-to-find, obsolete and out-of-production industrial control components.

4.Do you inspect goods before shipment?

Every product undergoes thorough inspection before packing and dispatch.

5.Can you ship orders worldwide?

We provide global shipping with flexible logistics for urgent and regular orders.

6.What payment methods are available?

We accept multiple secure payment options. Please contact our sales team for detailed terms