First TwinCAT PLC Project on a Beckhoff IPC
Build and verify a first TwinCAT PLC project on a Beckhoff IPC. This checklist covers target selection, EtherCAT discovery, I/O mapping, safe activation, restart tests, and commissioning records.
Manufacturer: ProSoft
Product No.: PLX31-MBTCP-MBS4
Country of origin:United States
Product Type: Protocol Gateways
Payment: T/T, Western Union
Weight: 2500g
Dimensions: 13.67 x 5.05 x 11.13 cm
Shipping port: Xiamen
Warranty: 12 months
Facilitating seamless bidirectional communication between Ethernet and serial-based field networks, the ProSoft PLX31-MBTCP-MBS4 acts as a robust protocol converter for industrial automation systems. This module enables a Modbus TCP/IP client or server to interface directly with up to four independent Modbus Serial networks, bridging the gap between legacy serial instruments and modern Ethernet control architectures. Engineered for high-reliability environments, it provides galvanic isolation on all communication paths and features a rugged, compact enclosure designed for DIN-rail mounting. With integrated diagnostics, a flexible power supply input, and individual port configuration, this gateway ensures low-latency data transmission across diverse factory automation, water treatment, and power distribution infrastructures.
| Manufacturer | ProSoft Technology |
| Model Reference | PLX31-MBTCP-MBS4 |
| Power Supply Input | 24 VDC nominal (10 to 36 VDC permitted) |
| Current Consumption | 300 mA @ 24 VDC nominal (610 mA maximum @ 10 VDC) |
| Ethernet Port | 1x 10/100 Base-T RJ45 connector, half/full-duplex auto-negotiation |
| Ethernet Isolation | 1500 Vrms (50 to 60 Hz for 60 seconds) |
| Serial Interface Ports | 4x isolated serial ports (RS-232, RS-422, or RS-485 configuration) |
| Serial Port Isolation | 2500 Vrms signal isolation (UL 1577 rated, RF modulation media) |
| Operating Temperature | -25 to 70 degC (-13 to 158 degF) |
| Storage Temperature | -40 to 80 degC (-40 to 176 degF) |
| Relative Humidity | 5% to 95% RH (non-condensing) |
| Shock Rating | IEC 60068-2-27: 15G operational (11ms), 30G non-operational (18ms) |
| Vibration Rating | IEC 60068-2-6: 5G @ 10 to 150 Hz |
| Dimensions (H x W x D) | 13.67 x 5.05 x 11.13 cm |
| Shipping Weight | 2.5 kg |
| Port / Terminal Block | Interface Type | Functional Assignment |
|---|---|---|
| Ethernet Port | RJ45 | Modbus TCP/IP Master (Client) / Slave (Server) connection |
| Serial Port 1 to 4 | Combicon Terminal | Modbus RTU/ASCII Master or Slave (RS-232, RS-422, or RS-485 configuration) |
| Power Terminal | 3-Position Pluggable | V+ (10 to 36 VDC), V- (DC Return), and Earth Ground |
The PLX31-MBTCP-MBS4 serves as a modernized replacement for older legacy gateways. When transitioning configuration profiles from previous-generation ProSoft modules, verify database memory mappings, as the internal database register structures may require offset realignment. Use the ProSoft Configuration Builder (PCB) software for smooth parameter migration.
A common issue during multi-port commissioning is Modbus TCP/IP transaction timeouts caused by slower serial-side responses. Ensure that your Modbus TCP master poll timeout matches the longest potential serial round-trip time. When running RS-485 configurations with high slave counts or long cable distances, external 120-ohm termination resistors must be installed at both physical ends of the trunk to prevent signal reflections.
The four serial interfaces feature specialized 2500 Vrms digital isolation chips. To maintain this high level of isolation performance, never share common reference or shield lines between different isolated ports or external power sources. For noisy VFD environments, utilize double-shielded twisted-pair (STP) cabling for all serial trunks and tie the cable shields directly to the cabinet ground at a single, centralized point.
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Returns & Warranty

Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Country of origin |
United States
|