German modas manufactures wireless LAN communication interface modules suitable for industrial environments. modas develops, manufactures, and distributes wireless LAN components with Ethernet and serial ports, particularly suited for use in industrial environments. modas aims to provide customers with wireless solutions that offer long-term stability and high quality. MC WLAN-Client-Adapter is used to connect one or more devices with Ethernet interfaces to a fixed network via WLAN infrastructure. MC offers various bridging modes to meet application-specific requirements.

Bridging mode LAN client IP's im WLAN transparency description

LAN client clones 1 1 (LAN client IP) all ports

The IP address and MAC address of the LAN client are registered in WLAN.

Single-client NAT 1 1 (MC IP) all ports

The IP and WLAN-MAC addresses of MC are registered in WLAN.

As many as NAT

1 (MC IP) port definition

Register in WLAN by configuring the IP and WLAN-MAC addresses of MC.

Level 2 bridges up to n LAN clients + 1 all ports. All LAN client IP and MC-IP are registered via the WLAN-MAC address of MC.

MWLC mode

1 (MC IP) all ports

Only the IP address and WLAN-MAC address of MC are registered in WLAN.

LAN client clone mode

In this mode, the device connected to the LAN port of MC determines the IP address and MAC address of the WLAN connection established between MC and the WLAN infrastructure. The configuration and monitoring of MC are performed via the IP address of the LAN client.

If only one LAN client is connected to MC, this mode should be preferred.

Advantages of modas wireless LAN communication interface module applications:

In the WLAN network, only one IP address will appear for MC.

modas wireless LAN communication interface module applicationsDisadvantages:

MC can only connect one LAN client.

NAT and single NAT mode

The NAT mode is characterized by the fact that LAN clients connected to the MC operate in a network different from the wireless network. The MC converts the traffic of LAN clients via WLAN to the fixed network so that all data is sent and received via the IP address of the MC.

NAT mode

Notes on the application of the modas wireless LAN communication interface module:

If only one LAN client is connected to the MC, the "Single Client NAT" mode should be used. In this mode, better access to the LAN client is possible without further configuration.

If multiple LAN clients are connected to the MC, the NAT mode must be defined.

When LAN clients provide server services addressed via WLAN, the ports used must be defined in the port forwarding table.

modas wireless LAN communication interface module applicationsAdvantages:

Any number of LAN clients can be connected to the MC.

The MC with all LAN clients displays only one IP address in the WLAN.

If many units are operating in a project, including multiple LAN clients with an MC, the configuration of all units is identical. Only the IP address of the MC for the wireless side may need to be configured separately.

Since the MC switches data only via configured ports, the LAN clients are better protected against unnecessary access.

Local broadcast packets (on the LAN side of the MC) are not transmitted via WLAN.

Disadvantages:

LAN clients can only be accessed via WLAN on ports defined in the NAT rules.

If LAN clients provide server services on the same port number (e.g., FTP), the user must define port forwarding rules to address these services on different ports for each LAN client.

Level two pseudo-bridge mode

In this mode, each LAN client communicates via the wireless network with its own IP address. However, all data is sent using the MAC address of the MC-WLAN card. This process may cause problems in certain WLAN infrastructure systems. Problems may arise when the WLAN controller uses an ARP cache.

Level 2 Pseudo-Bridge

Advantages:

Any number of LAN clients can be connected to the MC.

Without configuration, the transparency of LAN clients to the WLAN is good.

Disadvantages:

The MC and all wireless clients use their own IP addresses. These IP addresses must be in the same network.

Problems in certain WLAN infrastructures with centralized controllers (LAN clients cannot be accessed from the WLAN side).

MWLC mode

Using the MWLC mode, all limitations regarding availability, IP address assignment, and transparency can be resolved, especially in applications with multiple LAN clients. In this mode, all packets received from LAN clients are forwarded by the MC (slave) to another MC (master) installed on the fixed network side. The master MC extracts the LAN-Client packets and sends them to the fixed network.

MC Bridge MWLC Mode 1

In this mode, the IP address of the LAN client does not affect the MC. The LAN client connects to the fixed network using its own IP and MAC addresses. Since the MWLC master server in this cluster plays a central role and its failure would disconnect all clients, it is possible to install a second MWLC master server as a backup.

modas wireless LAN communication interface module applicationsAdvantages:

Maximum connection transparency for LAN clients entering the fixed network via WLAN.

The configuration effort for MC does not depend on the number of LAN clients.

Disadvantages:

On the fixed network side, one or two additional MC adapters are required.

For detailed descriptions of these modes, refer to the MC manual.

modas services:

Assembly of standard components (enclosures, antenna connectors, power supplies) according to customer requirements

Implementation of custom protocols

Contract development and manufacture of wireless components (boards or complete units) according to customer requirements

Custom branding (configuration) of enclosures or networks

Weidou Intelligent Technology (Shanghai) Co., Ltd. is a professional agent selling German modas wireless LAN communication interface module products for industrial environments. Users are welcome to inquire and place orders.