VDH ALFA 71 PI Manual

Also see for ALFA 71 PI: User manual Manual User manual

ALFA(NET) 71 PI 0/+100°C Doc.no.: 160111 version 1.0Pagina 3 van 810 Error messagesIn the display of the ALFA(NET) 71 PI the following error messages can appear:Lo1 - Minimum alarm. Solution E1:Hi1 - Maximum alarm. - Check if the sensor is connected correctly.E1 - Sensor-1 failure. - Check sensor (1000Ω/25°C).- Replace sensor.-L- - In case of sensor short-circuit the display alternates between error-code E..and -L-, as indication for a short-circuit sensor.-H- - In case of open-circuit sensor the display alternates between error-code E..and -H-, as indication for a open-circuit sensor.Reset Alarm. When a error-messages appears it can be resetted by pushing the SET key.The function of this key depends on parameter P37.11 Technical dataType ALFA 71 PI 0/+100°C orALFANET 71 PI 0/+100°CRange 0/+100°C readout per 0,1°CSupply 12 Vac 50/60Hz (-5…+10%)Display 3-digit 7-segment LED displaySensor SM 811 2-Wire PTC 1000Ω/25°CRelays Ry1 = SPST (NO) 250V/8A cosphi=1 or 250V/5A cosphi=0.4Ry2 = SPST (NO) 250V/8A cosphi=1 or 250V/5A cosphi=0.4Ry3 = SPDT (NO/NC) 250V/8A cosphi=1 or 250V/5A cosphi=0.4Relays have one common (C)Analogue output 0-10Vdc PI-output Rload = min. 10KOhmCommunication RS-485 Network Twisted-pair shieldedonly at ALFANET A, B, 0V (Twist A and B)Control By four push buttons on the frontFront PolycarbonateDimensions 35 x 77 x 71,5 mm (H x W x D)Panel cut out 28 x 70 mm (H x W) front mounting- Provided with memory protection during power failure.- Connection with screw terminals.- Equipped with senor failure detection.- Special versions are on request available.