1 Preliminary note Technical data, approvals, accessories and further information at www�ifm�com� 1.1 Symbols used ► Instructions > Reaction, result […] Designation of keys, buttons or indications → Cross-reference Important note Non-compliance may result in malfunction or interference� Information Supplementary note� 2 Safety instructions •...
3 Getting started Detailed description under → 8 Parameter setting� 1� Connect unit to PC to set the parameters via the IO-Link interface� 2� Set the standard unit of measurement� - [Uni]: °C or °F 3� Set analogue signal (→ 5.1)� - [OU2]: I = 4���20 mA or I neg = 20���4 mA - [ASP] and [AEP]: scaling of the measuring range�...
5 Function • The unit features an IO-Link interface� • The unit is designed for two or three-wire operation� Depending on the operat- ing mode the following output signals are provided: Operating Output signals mode 2 wires OUT: analogue signal for temperature measurement / analogue signal for diagnostics 3 wires OUT1: switching signal for diagnostics / IO-Link...
temperature value continues to increase or decrease, case of diagnostic 5 occurs (→ 5.2.3)� I [mA] FOU = On 21.5 20.5 FOU = OFF T [°C] Figure 1: Output characteristics analogue output with factory setting Setting [OU2] = I Setting [OU2] = Ineg MAW = initial value of the measuring range, MEW = final value of the measuring range, ASP = analogue start point, AEP = analogue end point 5.2 Diagnostic function...
5.2.1 Drift monitoring For drift monitoring the unit compares the temperature deviation of sensor element 1 (NTC) and sensor element 2 (Pt 1000) from the mean value� The permissible temperature deviation is defined by the parameters drW = warning threshold and drA = alarm threshold�...
5.2.2 Sensor backup (redundancy switching) If one of the two sensor elements fails (= diagnostic case 4 → 5.2.3), it is possible to continue to measure the temperature with the other sensor element that is still operational (sensor backup → 10 Fault correction; Fnr 21)� However, drift monitor- ing is not possible any more�...
Diagnostic messages Diagnostic cases [drEd] Warning Alarm Failure (→ 5.2.3) = ON ● 7���9 ● ● = ONdr 3���9 ● ● ● = OFF 1���9 Table 1: Setting of diagnostic cases to be signalled (2-wire operation) - Setting [drEd] = ON provides maximum availability since the transmission of the meas- ured temperature value is only interrupted for the diagnostic message in diagnostic cases of category "failure"�...
Since all diagnostic cases can be signalled via the switching output in 3-wire operation, the analogue output only leaves its measured tempera- ture value in diagnostic case of category "failure"� This ensures maximum use of the analogue output� The parameter [dOU1] is used to define how the diagnostic output reacts to diag- nostic messages: Diagnostic message Normal...
6 Installation ► Before installing and removing the unit make sure that no pressure is applied to the system and there is no medium in the pipe� ► Note dangers related to extreme machine / medium temperatures� Information about the available adapters at www�ifm�com� ►...
6.3 Use in hygienic areas to 3-A The following applies to units with 3-A certification: ► Only use adapters with A-3 certification for the process connection� ► Do not install the unit at the lowest point of the pipe or tank (→ position 5) in order that the medium can run off the area of the measuring element�...
7 Electrical connection The unit must be connected by a qualified electrician� The national and international regulations for the installation of electrical equipment must be adhered to� Voltage supply to EN 50178, SELV, PELV / "supply class 2" to cULus� ►...
8 Parameter setting Using an IO-Link capable parameter setting tool, the following options are available: - Reading current process values� - Reading, changing and saving current parameter settings and transmitting them to other units of the same type� - Read saved diagnostic information (→ 10)� ►...
Drift failure threshold: [drF] = drA + 3 K; if this value of the temperature deviation is exceeded, a diagnostic message of the category "failure" is provided� • drF cannot be set but results from the setting of drA� • Setting drA = OFF automatically results in: drF = 8 K Delay of the drift detection�...
10 Fault correction In case of faults or anomalies: ► Connect unit with a PC� ► Read [Fnr]� Fnr Type of fault Corrective measures No fault, no anomaly occurred� Internal malfunction in the sensor ► Replace the unit� electronics� Backup function of the sensor activated, ►...
Fnr Type of fault Corrective measures Supply voltage outside the operating ► Check the supply voltage; ensure a voltage range� correct voltage supply� Operating temperature of the electronics ► Check the temperature of the upper outside the specified range� part of the unit� ►...
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