EtherLogic Advanta Controller - Industrial Control Links

Etherlogic AdvantaWhen incoming power is present, this bit set whenever the backup battery voltage isless than 11.8 volts. It is turned off when the battery charges up to at least 12.5 volts.This provides an indication of the charging state of the backup battery.When incoming power is NOT present (controller is running on backup battery power),this bit is set when the battery voltage drops below 10.5 volts. This serves as awarning, since the power from the battery will be automatically disconnected(controller shut off) when the battery voltage drops below 9.8 volts in order to avoiddeep discharge damage to the battery. The alarm bit is reset when the battery rises upto at least 12.0 volts or incoming power is restored above the thresholds describedpreviously.High-speed Pulse InputsThe Advanta Controller can accept both conditioned and unconditioned high-speedpulse signals, typically indicating some sort of flow or movement. Conditioned signalscome from electronic devices that provide a high-level digital signal that is compatiblewith the “normal” Discrete Inputs. The Advantas DI5,DI6 and DI7 inputs are ideal forthese types of signals. Unconditioned signals come directly for a sensor with noelectronic conditioning. These are typically magnetic pickups or miniature “generators”whose output signal varies from millivolts to volts AC (the low-level pulse inputs supportfrom 50mV to 108Vpp). In addition, some types of equipment provide logic-levelsignals (otherwise known as TTL or CMOS levels) that do not have sufficient amplitudeto drive the DI5,DI6 and DI7 discrete inputs. These later two types of signals can behandled by either of the Advantas two low-level high-speed pulse inputs.Signal Types and LevelsThe low-level high-speed pulse inputs areconfigurable by DIP switches on the bottom side ofthe controller. There are two switches per input. Foreach input, one is marked AC/DC (AC/DC coupling),the second is marked AD/0X (Adaptive or zero-crossthresholding).For proper operation, the pulse input signal musttraverse above and below 0 volts. The AC signalsfrom magnetic pickups operate this way, so they canbe accepted directly (DC coupled) into the pulseinputs. Logic signals transition from 0 to between 3and 5 volts, so they don’t meet this requirement and must be AC coupled into thepulse inputs. In summary, set the coupling DIP switches as follows:Signal TypeAC signals such as Magnetic PickupsDC Logic and conditioned signalsCouplingDC couplingAC coupling38Copyright © 2007 Industrial Control Links, Inc. All Rights Reserved