Page 8 of 20 Rev. B 11/2006 Operating instructions DFA 127 Full Power
Operating instructions
The mechanical BDI is by factory default always connected and active on a DFA
127. If an additional electronic BDE-D is connected, the operating mode is set by a
defined priority structure from the BDE with the highest priority.
The priority and the code shown in the following table apply to the operating mode,
whereby BDE2 (S2) and BDE1 (S1) represent the two input terminals of the control
unit (à J7/1 + J7/2, p.c.b. BDE-M) for the mechanical BDE:
(L = interruption or 0V, H = +24V)
Mechanical BDI (toggle switch) Electronic BDE-D
BDE2 (S2) BDE1 (S1) Function Priority
(1=highest)
locked 1
one-way 2
L H continuously open 3
H L manual 4
L L automatic 5
The BDE-D indicates the current operating mode.
If an operating mode is set on the BDE-D, which has no current priority, the status
message 62 is displayed.
Reset button
After pushing for approx. 5 sec. a new start of the control is performed (software
reset). After the reset the LED lights up permanently.
Status signal
- Remains off if no fault is present.
- Will blink if a fault is present (see status and fault signals / chapter 8)
- Does light up permanently during a reset.
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