3vacon • 72 Descriptions of VACON® option boardsLocal contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/I/O terminals on OPTD1NOTE: The terminals of the board are protected with a rubber pin. Be sure to leave the pin in theunused terminals in order to avoid disturbances.Connections between AC drives with OPTD1Basic connection:Connect the output 1 of Device 1 to the input 2 of Device 2 and the input of Device 1 to the output 2of Device 2. Note that in the end devices one terminal pair remains unused. See Figure 24 below.Table 39. OPTD1 I/O terminalsTerminal Technical information1H1System Bus optical input 1 (RX1)Use 1-mm optical cable (e.g. Agilent HFBR-RUS500 &HFBR-4531/4532/ 4533 connectors)2H2System Bus optical input 2 (RX2)Use 1-mm optical cable (e.g. Agilent HFBR-RUS500 &HFBR-4531/4532/4533 connectors)3 H3 System Bus optical output 1 (TX1)Use 1-mm optical cable (e.g. Agilent HFBR-RUS500)4 H4 System Bus optical output 2 (TX2)Use 1-mm optical cable (e.g. Agilent HFBR-RUS500)Table 40.Max.number of devices in lineMax.speed achieved [Mbit/s]3 126 612 324 1.5