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UK
• Window function / normally open: [OUx] = [Fno] (→ fig. 2).
• Window function / normally closed: [OUx] = [Fnc] (→ fig. 2).
The width of the window can be set by means of the distance between SPx and
rPx� SPx = maximum value, rPx = minimum value�
1
2
P = system pressure; HY = hysteresis; FE = window
4.3 Diagnostic function
Output 1 is used as a diagnostic output according to DESINA specification if OU1
= dESI�
•
If there is no fault, the output is switched and carries UB+ (if P-n = PnP) or UB-
(if P-n = nPn)�
•
In case of malfunctions the output becomes inactive� The following malfunc-
tions are detected:
-undervoltage (starting with 18 V); overvoltage (starting with 33 V);
-temperature at the process connection too high (> 150°C) / too low (< -30°C);
-intrinsic temperature of the unit too high (> 100°C) / too low (< -30°C);
-RAM fault�
