Old PLC Accessories DISCONTINUED Product Line Please select from a product below: IN-588A - Programmable Prescaler - Discontinued The IN-588A Prescaler is primarily designed and manufactured for use with flow transducers or other devices with frequency output signals.Download Installation Guide. IN-588B - Flow Totaliser - Discontinued The model IN-588B is a self powered flow totalising counter intended for use in industrial applications.Download Installation Guide. IN-OID - Optical Isolator - Discontinued Interface for the purpose of potential free matching and protection of on/off dc input process signals to on/off dc output signals.Download Installation Guide. TW-DA - Digital to Analogue Converter - Discontinued The TW-DA is designed primarily for low cost digital to analogue conversions for PLC’s, controllers, etc.Download Installation Guide. TWN-LUX - Light Sensor - Discontinued The TWN-LUX incorporates a silicon photodiode light sensor, in a hermetical sealed case, especially designed for high precision linear applications.Replaced by the LPN-LUX – Light Intensity Transmitter.Download Installation Guide.