The RDC1 board is a programmable resistor. A series connection of 24 binary graded resistors (1, 2, 4, 8, 16 Ω etc.) is bridged by relay contacts, whereby resistance values in the range from 0 Ω to 16.77 MΩ can be set. For values below 63 Ω, a separate tap is used in order to keep the transition resistance of the contacts connected in series as low as possible. The total resistance can be switched to either connector X1 or X2.
Programmable ohmic resistor for test purposes
Simulation of NTC or PTC conductors
Testing of temperature regulators and measuring transducers