SD Series Application Advantages Operational temperature range from –40°C to 70°C CSA Class I, Div. 2 groups A,B,C,D for Hazardous Locations IEEE1613*, IEC 61850-3 and EN61000 for electric substation environments Application Flexibility Supports two serial ports and an IP/Ethernet port simultaneously Broad coverage flexibility over distances up to 50 miles Supports Ethernet Bridging, IP to serial and serial to serial communications Low power consumption with sleep mode for solar and battery powered applications Fast-serial features with embedded terminal server functions for serial to IP/ Ethernet encapsulation Extend communication paths using single radio store and forward

Reliable & Scalable Exclusive, non-shared licensed band operation High performance Media Access Control for asynchronous polling and exception reporting Collision detection and avoidance insures data arrives at destination without lost messages High receive sensitivity for long distance communications Compatible with multiple industry protocols including Modbus, Modbus TCP, and DNP3 Secure AES 128-bit data encryption Password protected access VLAN data segregation * Requires an external DC to DC converter having floating DC inputs (neither side grounded)

The MDS SD Series of industrial-strength radios offer secure, reliable, long distance transmission of data for your mission critical applications. The SD Series combines 5 Watt transmit power and exceptional receive sensitivity to support wide coverage areas and maximum performance when difficult terrain or obstructions such as trees and buildings limit the effectiveness of other wireless devices. The SD Series operates in the 100 MHz(SD1), 200 MHz (SD2), 400 MHz (SD4) and 900 MHz (SD9) frequencies and allows users to select the channel size and modulation option best suited to their unique requirements. The combination of these features results in the ideal data acquisition product for error free, long distance communication.

MDS SD Series radios can be directly added to existing MDS x710 and x790 systems, providing both "drop-in" compatibility for expansions and replacements, and adding Ethernet support. Backward compatibility preserves your investment and allows a smooth transition from a serial based SCADA infrastructure to IP/Ethernet without disrupting day-to-day operations.

The SD1 radio operates in the 100 MHz frequency band, SD2 radio operates in the 200 MHz frequency band, SD4 operates in the 300 and 400 MHz frequency band, and the SD9 operates in the 900 MHz frequency band. Choose between models that support both Ethernet and serial, or only serial interface. The SD Series handles concurrent Ethernet and serial traffic using built-in terminal server plus industry- standard TCP or UDP protocols.

The SD Series handles concurrent Ethernet and serial traffic from multiple sources. Directly communicate to multiple PLCs using the built-in serial device server and modem-sharing device using industry-standard TCP or UDP protocols.

The SDxP is used when applications demand no single point of failure for the communications system. The MDS SDxP incorporates two MDS SD transceivers and power supplies with automatic or manual switchover capability. On detection of a failure, the MDS SDxP switches immediately to the standby transceiver. The switchover occurs for selectable transceiver alarm conditions. Switchover also occurs when no valid packets are received in a time frame of 1–30 minutes, or upon loss of power to the operating radio. An internal backup battery is provided in AC-powered models for continued operation during a loss of primary power.

The SDA adaptor is used with 4790 and 9790 Master Stations to add IP/ Ethernet connectivity and SD features. The SDA can be ordered with new Master Stations or easily added to equipment already installed. Once connected to a 4790/9790, one (1) serial port and one (1) Ethernet port are available for connection to external systems or devices.