The Hirschmann GRM20-ZZZZTTTTSZ9HHS Greyhound Switch Media Module is a rack-mounted industrial Ethernet media module. This module is designed to provide a cost-effective Ethernet network solution to entry-level applications. This switch offers 8 fast FE/RJ45 Ethernet ports with RJ45 twisted-pair sockets.

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Warranty: 1 year Networking-Hardware Warranty Included
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Repairs: We offer repair service for the GRM20-ZZZZTTTTSZ9HHS.
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The Hirschmann GRM20-ZZZZTTTTSZ9HHS Greyhound media module is an industrial Ethernet network media module designed for entry-level industrial automation applications. The GRM20-ZZZZTTTTSZ9HHS media module offers 8 fast FE/RJ45 Ethernet ports that support connections with twisted-pair cable up to 100 meters long to a Greyhound switch. Each RJ45 port supports auto-crossing, auto-negotiation, and auto-polarity functions. The GRM20-ZZZZTTTTSZ9HHS media module offers simplified setup and configuration via a serial interface or an integral USB configuration interface. The V.24 serial interface is an RJ45 socket for the local connection of external management stations such as the VT100 terminal or a PC with terminal emulation. The serial interface on the GRM20-ZZZZTTTTSZ9HHS media module allows the users to set up a connection to the Command Line Interface (CLI) and to a system monitor. The GRM20-ZZZZTTTTSZ9HHS media module also offers streamlined commissioning time via a USB port, which allows the users to store configuration data on an external flash-based device.


The Hirschmann GRM20-ZZZZTTTTSZ9HHS Greyhound media module features an extended list of approvals and industrial standards. It has a standard operating temperature range of 0 to 60 degrees Celsius and a rated relative humidity range of 5 to 95% without condensation. The GRM20-ZZZZTTTTSZ9HHS media module has several industry approvals such as the CE, FCC, and EU Safety approval ratings, and it comes with an IP 30 ingress protection rating that is suitable for harsh industrial environments. The power for operation is supplied via a power supply configurator on the Greyhound switch that hosts the media module. The power supply module supplies 48 to 54 Volts DC voltage and the media module has a maximum power consumption rating of 2 Watts. Standard Greyhound power supply modules offer a power over Ethernet (PoE+ and PoE) functionality. This module powers PoE-enabled end devices by using a twisted Ethernet cable that is also used for network transmission.


Technical specifications


Rack Mount Switches


Greyhound Switch Media Module

48 to 54 Volts DC

2.0 Watts





8 Standard 10/100 BASE-TX RJ45 Ports

3-Pin Terminal Blocks

0 to 60 Degrees Celsius


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