## Modem Communications

Some versions of the MiCOM S1 Studio software prior to V4.0.0 did not have a ModemA device used to convert data from a PC or device into a form that can be transmitted across a telephone line and then converted back into PC or device readable data at its destination. The codes used to initialise and control a modem so that it can convert data from a PC or device into a form that can be transmitted across a telephone line. Communications option.

Software Version V4.0.0 and later allows you to use Modem Communications on Px3x and Px4x (but not Px10/V11x or Px20) product ranges. This means that you can use access older legacy products as well as linking to Px3x devices.

The implementation of the Modem Communications option in the V4.0.0 software includes all the similar functions included in the MiCOM S1 Studio V2.14 software and is in-line with various international customer requirements.

In V3.5.0 software the modem communications is implemented over 103, CourierThe communications language developed to provide generic control, monitoring, data extraction and setting changes on remote devices within the substation environment. and Modbus protocols.

In V4.0.0 software the modem communications includes 103, but excludes Courier and Modbus protocols.

Caution

It is possible to use the same modem link to access more than one IEDIntelligent Electronic Device. A device that initiates the disconnection of part of an electrical installation, and / or operates a warning signal when a fault or abnormal condition occurs, with minimum disruption of service. May also be known as a Relay./RelayA device that initiates the disconnection of part of an electrical installation, and / or operates a warning signal when a fault or abnormal condition occurs, with minimum disruption of service. May also be known as an IED. device. If you do this, it is essential that the modem link is NOT closed when you are connecting/disconnecting to any one or more of the IEDs/relays. If the connection is closed, it is possible your PC or the device will be left with incomplete data, which may result in serious safety risks.

### Epsilon Cable

Modem communications requires the use of a unique cable called an Epsilon cable. In appearance, this has a D-type serial connector on one end and an RJ45 network connector on the other end. The Epsilon cable is available from Schneider Electric.

### To use Modem Communications

1. Follow the instructions in the Place the MiCOM relay/IED into Extended Platform Mode topic.
2. Connect the MiCOM relay/IED to the PC, using the Epsilon cable.
3. In the MiCOM S1 studio software, click the Quick Connect menu option.
4. In the Quick Connect dialog box, click the relevant device type.
5. In the Port Selection dialog box, click the relevant port.
6. In the ConnectionAn active link between a computer and a device through which data can be sent. Parameters dialog box, type the relevant settings for the Devicegeneric name for any piece of equipment that can be communicated with using Courier. IP AddressA unique number, between 1 and 254, that identifies a device to the computer. and Relay Address .
7. Click the Finish button to make the connection.
8. To transfer the files from the PC to the MiCOM IED/relay device, follow the instructions in the File Transfer topic.

#### See Also:

- FTP Communications