D.20 RIO - HARDWARE USER’S MANUAL GE Information 29D.20 RIO Distributed I/O ControllerChapter 3: Connecting to Devicesand NetworksConnecting to Devices and NetworksThis chapter provides guidelines for making physical connections between the D.20 RIOand substation and network devices.Cabling overviewAll physical connections are made to the connectors on the rear panel of the D.20 RIO.Figure 7: D.20 RIO field and network connectorsGeneral cabling requirementsThe following cables are required to connect to the D.20 RIO:Table 5: Required cablesTo provide higher EMC immunity and maintain CE Mark radiated emission compliance, theserial cables used for permanent D.20 Link connections must comply with the followingrequirements:• Cables must be shielded, with the shield terminated to the connector shell on the D.20RIO side.Media GE part number Designation Cabling ConnectorTwisted PairEthernet977-0209 10/100BaseT UTP (Unshielded TwistedPair) – CAT 5 or betterRJ-45D.20 Link 977-0089 RS-4854 twisted pairsShielded DB-9 maleSerial 977-0529 RS-232 Null modem DB-9 female
