The EWDR 902 is a series of micro-processor based and fully programmable process controllers for single setpoint applications.
Three different versions of this controller are available: EWDR 902/T for Temperature, EWDR 902/R for Relative humidity and EWDR 902/P for Pressure control.

• Housing: 4-DIN module 70x85 mm (2.75x3.34"), plastic resin PC+ABS extinguishing grade V0
• Depth: 61 mm (2.40")
• Mounting: DIN-rail (Omega 3) or surface mount
• Connections: screw terminal block (2.5 mm2)
• Display: 12.5 mm LED (0.50")
• Push buttons located on front panel
• Output: one (1) SPDT relays 8(3)A 250V AC
• Auxiliary output: 12 Vdc/60 mA (for transducer power supply, e.g. humidity sensor, pressure transducer, etc. )
• Inputs (depending on model): PTC / RTD (Ni100, Pt100) / TC (J, K) / 4…20 mA (Ri = 41 -) for EWDR 902/T; EWHS 28/31 for EWDR 902/R and EWPA 007/030 for EWDR 902/P
• Resolution: 1 °C (°F) or 0,1 °C (°F). The right-most digit can also be set to read-out in 0 or 5 only, or in all 10 digits
• Accuracy: better than 0,5% of full scale
• Power supply (depending on model): 230, 110, 24 Vac; 18…36 Vac, 24…48 Vdc; 12 Vdc