DuraChill DCA203C4, Operator'S Manual, Page: 16 / 43

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Optional Signal Inputs/Outputs
RS-232 / RS-485 Serial Output
This option allows you to remotely control the Chiller and/or output temperature readings to an external recorder
or other auxiliary device. The maximum communications distance for Chillers equipped with the RS232 option is
50 feet (15 meters). The maximum distance for units equipped with the RS485 option is 4000 feet (1200 meters).
A 9-pin D-connector is provided on the rear of the instrument enclosure for this connection.
Remote On / Off Port
This option allows you to connect a remote on/off switch or other remote control device to the Chiller. The Chiller
is ON when the contact is open; it is OFF when the contact is closed. A 10-ft (3 m) cord with 5-pin mating plug is
provided.
Alarm Output
This allows the operator to connect a remote alarm device to the Chiller. The alarm output consists of normally
open (NO) and normally closed (NC) contacts which are switched whenever an alarm, fault, or error condition is
detected or when the Chiller is OFF. A 10-ft (3 m) cord with 5-pin mating plug is provided.
Remote On / Off and Alarm Output