Electronic isolator TDI

TDI – Electronic Time Delay Isolator Time Delay Interlocking The TDI electronic time delay isolator is a heavy duty trapped key interlock switch controlled by a fail-safe timer and solenoid. The TDI unit is designed to control access to hazardous machines with run down times and can be used in high risk applications. It incorporates a dual channel fail-safe timer, a heavy duty continuously rated solenoid, solenoid position monitoring, a 20A isolation switch, a front panel lamp indication of solenoid position and a timer failure with one or more lock portions for multiple access applications. OPERATION The Castell TDI electronic time delay isolator is typically used for machine isolation in applications in order to protect the hazardous area from access while power is on. The TDI is available with different solenoid voltages as AC or DC: 24, 110 or 240 V (see order information on page 6 for more details). The TDI comes with 6 contacts as standard with contacts arrangements as 3NO/3NC, but auxiliary set of contacts are available on request. USAGE The TDI electronic time delay isolator is designed to be part of a safety system and is used to switch off the power once the pre-set time (set longer than the run-down time of the machine) has elapsed before releasing a key or a set of keys. This key is then used to gain access to a hazardous area via an access interlock such as the AI. The TDI electronic time delay isolator is not designed for security purposes