DMR 50-5/50 Installation Guide V3.0 Pag. 18
5.4.3
Digital Output Internal wiring
The output maximum current have to be < 25 mA. To protect the output is suggested to add an external
resistance R > 860 Ω.
In the event of a current ≥ 25 mA, there is a risk to damage the output transistor.
MMBT3904
MMBT3906
100R
820R
+24V
MMBT3904
MMBT3906
10K
10K
47K
GND
GND
10K
10K
10K
T1
T2
R9
R10
T3
T4
R11
R12
R13
R14
R16
R15
NPN_OUT
PNP_OUT
EXT-OUT
25 mA max