20 8163A/B, 8164A/B, 8166A/B User’s Guide1 Getting StartedInput/Output SignalsLine Power ConnectorsIn accordance with international safety standards, the instrument has athree-wire power cable. When connected to an appropriate AC powerreceptacle, this cable earths the instrument cabinet. The type of powercable shipped with each instrument depends on the country of destination.CAUTION The 8166A/B Lightwave Multichannel System complies with overvoltagecategory II and can operate from any single-phase AC power source thatsupplies between 100 V and 240 V at a frequency in the range from 50 to60 Hz. The maximum power consumption is 450 VA with all optionsinstalled.CAUTION There are two input BNC connectors: the Remote Interlock Connectorand the Trigger Input, see “Input and Output Connectors” on page 310.These are TTL inputs. A maximum of 5 V can be applied as an externalvoltage to either of these input connectors.There is one output BNC connector: the Trigger Output, see “Input andOutput Connectors” on page 310. This is a TTL output. Do not apply anexternal voltage to this connector.