Description
Note: Many products are not yet listed. Please contact us for more product information. Our supply channels are constantly expanding, and we currently have 20 stable shared supply channels. Please confirm the model, product, price, and all other necessary information with customer service before placing an order. We offer new, refurbished, and used products, and prices are adjusted according to the year of the item you require.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Form Factor | 1769 single-slot CompactLogix module |
| Backplane Current Draw | 500 mA max @ 5 VDC |
| Serial Ports | 2 independent application ports (P1, P2) |
| Serial Interface | RS-232 / RS-422 / RS-485, software selectable |
| Protocol | Modbus RTU (CRC-16), Modbus ASCII (LRC) |
| Port Mode | Each port: Master, Slave, or mixed |
| Baud Rate | 110 bps to 115200 bps |
| Data Format | 7/8 data bits, 1/2 stop bits; None / Even / Odd parity |
| RTS Delay | 0–65535 ms configurable |
| Isolation | 500 V optical isolation between serial ports and backplane |
| Diagnostic Port | 10/100 Mbps auto-negotiate Ethernet port |
| Data Transfer Sizes | 60 / 120 / 240 16-bit words block transfer |
| Supported Float | Standard, Enron, Daniel floating-point mapping |
| Max Modbus Commands | Up to 250 commands per port |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | -40 °C to +85 °C |
| Humidity | 5%–95% non-condensing |
| Software Compatibility | Studio 5000 Logix Designer, Add-On Instructions & AOP profile |
| Hot Swap | Supported for CompactLogix rack architecture |
| Certification | CE, conformal coating optional |
Product Introduction
Prosoft MVI69E-MBS is a dedicated in-chassis Modbus serial gateway built for CompactLogix PAC systems. It offloads Modbus polling and protocol handling from the controller CPU, reducing PLC scan-time impact. The two serial ports operate independently, so one port can run as a Modbus master polling transmitters and VFDs while the other port acts as a slave for SCADA host polling. The built-in Ethernet port is used for module configuration, live diagnostics, and status monitoring. Pre-built Add-On Profiles and Add-On Instructions simplify tag mapping, alarm handling and project backup. The optical isolation barrier protects the CompactLogix backplane from ground loops and transients on long serial field wiring.
MVI69E-MBS
MVI69E-MBS
Application Scenarios & Field Experience
This module is widely used for integrating legacy serial instruments into modern CompactLogix control systems.
- Water & wastewater treatment: Flow transmitters, level sensors, pH analyzers, chemical dosing VFDs
- Oil & gas wellhead skids: Pressure transducers, temperature transmitters, local shutdown panels
- Building energy management: Chiller controllers, power meters, air handling unit serial interfaces
- Food & beverage processing: Weighing scales, barcode readers, temperature recorders
- General factory automation: Retrofit of older Modbus-RTU devices to Logix control platforms
A water treatment plant had inconsistent readings from remote flow meters on a long RS485 trunk. The original module lacked adjustable RTS timing and suffered collision errors. After installing MVI69E-MBS, tuning the RTS delay and enabling 120Ω termination at the bus endpoints, register reads became stable with zero packet loss.
Standard Operating Procedure (SOP) for Quality Control
- Visual Inspection: Check housing, backplane gold fingers, RJ45 and serial port connectors; verify no bent pins or corrosion.
- Firmware & Revision Check: Record hardware revision and firmware version, confirm compatibility with target CompactLogix firmware.
- Backplane Communication Test: Insert into 1769 rack, confirm backplane (BP) and OK LED status.
- Ethernet Diagnostic Port Test: Establish web connection, verify module web page loads and configuration uploads.
- Serial Port Functional Test: Configure each port in Master and Slave modes, validate RTU and ASCII read/write cycles.
- Isolation Resistance Check: Confirm isolation barrier between serial side and backplane circuit.
- ESD Packaging: Seal in anti-static bag with foam padding, include breakout cable set when supplied.
Frequently Asked Questions (FAQ)
Q1: Can one port be Master while the second port is Slave? A: Yes. Each serial port is independently configured, mixed master/slave operation is fully supported.
Q2: Does this module require separate configuration software? A: Configuration is completed through the module’s web interface and stored within the CompactLogix project via AOI/AOP, no separate configuration builder software is mandatory.
Q3: Can it handle Enron Modbus floating-point registers? A: Yes, it supports standard, Enron, and Daniel floating-point byte/word ordering for legacy instrument compatibility.
Q4: What is the warranty coverage? A: 12 months warranty from shipment date. Warranty excludes damage from overvoltage, reverse wiring, ESD events, or surge damage on the RS485 bus.
Q5: Can I hot swap this module while the CompactLogix rack is powered? A: Hot swap is supported on standard CompactLogix racks. Plan carefully; swapping will pause Modbus communication on the serial ports during replacement.
