VDH ALFANET 71 User Manual

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Contents

error messages

ALFA(NET) 71 0/+100°C Document No.: 170982 Version 1.0Pagina 3 van 89 Error messagesIn the display of the ALFA(NET) 71 the following error messages can appear:E1 - Sensor-1 failure. Solution E1, E2:E2 - Sensor-2 failure. - Check if sensor is connected correctly.Lo1 - Minimum alarm on sensor-1. - Check sensor (1000Ω/25°C).Hi1 - Maximum alarm on sensor-1. - Replace sensor.Lo2 - Minimum alarm on sensor-2.Hi2 - Maximum alarm on sensor-2.Resetten Alarm. When an error-messages appears it can be resetted by pushing the SETkey. The function of this key depends on parameter P37.If an sensor failure E1 or E2 is still present after confirmation (SET) the alarm, the controller willalternately display E.. and – L – at an short circuit of the sensor or E.. and – H – at an interruptedcircuit of the sensor.10 Technical dataType ALFA 71 0/+100°C orALFANET 71 0/+100°CRange 0/+100°C uitlezing per 0,1°CSupply 12 Vac 50/60Hz, 3VA (-5…+10%)Display 3-digit 7-segments LED displaySensors 2x 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)Communication RS-485 Network Twisted-pair afgeschermdonly at ALFANET A, B, 0V (A and B twisted)Control By four push buttons on frontFront PolycarbonateDimensions 35 x 77 x 71,5 mm (H x W x D)Panel cut out 28 x 70 mm (H x W) for front mounting- Provided with memory protection during power failure.- Connections with screw terminals on the back side.- Equipped with sensor failure detection.- Special versions are on request available.