September 2011
Operator Interfaces, Switches & Relays
NewElec’s MA RDU 216 panel-mounted keypad entry display unit is designed for use with the company’s MA range of electronic motor protection relays. The unit allows the user to set all protection parameters and monitor the actual values while the motor is in operation. It also allows the user to view the fault alarms and real-time clock logged faults.
The handheld programming and display unit has a dongle connected in line with the serial communication cable. This is used to alter any settings, eliminating unauthorised alterations. If the dongle is not available, read only functions are tolerated by the device.
All functions are accessible via a membrane keypad, while the 2 x 16 backlit LCD display is used to indicate the menu driven requested values. It is also used to prompt the operator as to which key to press in the event of a multiple keystroke sequence.
The MA RDU 216 accommodates up to eight memory slots that are useful for storing information, even when the auxiliary power supply is removed, to allow the setting parameters to be downloaded to the appropriate MA motor protection relay.
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