General
Interface standards	RS-232, RS-422, RS-485
Data bits	7, 8
Stop bits	1, 2
Air humidity	5–95 % nicht kondensierend

The MGate 4101-MB-PBS-T from Moxa is an industrial-grade protocol gateway that enables communication between Modbus devices and PROFIBUS DP V0 systems. It serves as a bridge between Modbus RTU/ASCII (in master and slave mode) and PROFIBUS DP V0 (in slave mode), allowing Modbus devices to be seamlessly integrated into existing PROFIBUS networks. The devices support Siemens S7-300/400 controllers in particular and are designed for use in demanding industrial environments. The QuickLink function accelerates setup through automatic I/O detection (AutoLearning) and mapping (AutoMapping), enabling configuration to be completed within minutes.

Applications
This gateway is suitable for use in industrial automation systems, especially in environments where Modbus devices need to be integrated into PROFIBUS networks. It is commonly used in production facilities, power supply systems, or transportation technology, where reliable and robust communication between different protocols is required. Support for Siemens S7-300/400 controllers makes it particularly interesting for installations using this control technology.

Functions and Features in Detail
The device features a serial interface with a DB9 male port supporting RS-232, RS-422, and RS-485 standards. The baud rate can be set between 50 bps and 921.6 kbps, with configurable data bits (7 or 8), parity (none, even, odd, Space, Mark), and stop bits (1 or 2). Flow control is achieved via DTR/DSR and RTS/CTS. The PROFIBUS interface provides a DB9 female port with a baud rate of 9600 bps to 12 Mbps in DP-V0 slave mode. Addressing is done via a rotary switch (0–99) or software (100–125). The maximum number of I/O modules is 24 per side and 32 sides, with a maximum data length of 7744 bytes (input/output). The integrated diagnostic function supports fault detection and troubleshooting during operation.

Technology Explained Simply
The serial interface allows connection to Modbus devices, with RS-485 support including Auto Data Direction Control (ADDC) and a 120-Ohm termination resistor ensuring stable data transmission. The PROFIBUS interface is designed as a DP-V0 slave, meaning the gateway receives data from a PROFIBUS master and forwards it to Modbus devices, or vice versa. The 2 kV isolation on the PROFIBUS interface protects against electrical interference and voltage surges. The operating temperature of the T model ranges from -40 to 75 °C, making it suitable for extreme environmental conditions. Power supply is via 12–48 VDC, connected through screw terminals (Euroblock). A relay output with 1 A @ 24 VDC (resistive load) enables additional control functions.

Compatibility and Accessories
The gateway is compatible with Modbus RTU/ASCII devices in master and slave mode, as well as PROFIBUS DP V0 systems in slave mode. It supports Modbus functions 1, 2, 3, 4, 5, 6, 15, 16, and 23. The maximum number of Modbus commands is 100. Integration with Siemens S7-300/400 controllers is supported by default. The device is certified for use in ATEX, IECEx, and Class I Division 2 environments, enabling use in explosive atmospheres. Certifications include EMC (EN 55032/35, CISPR 32, FCC Part 15B), EMS (IEC 61000-4-2/3/4/5/6/8), safety (IEC/UL 60950-1, IEC/UL 62368-1), and environmental standards (RoHS, WEEE).

Mounting and Installation
The device is mounted on a DIN rail and features a metal housing with dimensions 36 × 105 × 140 mm and a weight of 500 g. The IP30 protection class protects against finger contact and solid foreign objects, but not against water. Mounting is done using the included DIN rail mounting kit. Power supply is via screw terminals (Euroblock), with redundant DC power inputs increasing reliability. Configuration is supported by the included RJ45-to-DB9 console cable and the Quick Installation Guide.

Operational Advantages
The combination of a robust metal housing, redundant power supplies, integrated diagnostics, and the QuickLink function ensures high availability and easy maintenance. The operating temperature range of -40 to 75 °C makes the device suitable for extreme environments. The MTBF (Mean Time Between Failures) is 1,537,948 hours for standard models and 1,315,666 hours for models with isolation, calculated according to Telcordia SR332. The 5-year manufacturer's warranty underscores the product's reliability. The integrated 2 kV isolation on the PROFIBUS interface protects against electrical interference and increases the device's lifespan.

Scope of Delivery
The product is delivered with the following components: 1 × MGate 4101-MB-PBS Gateway, 1 × RJ45-to-DB9 console cable, 1 × DIN rail mounting kit, 1 × Quick Installation Guide, 1 × warranty card.