Record STM 21 - Control Module STM 21 RED; Controlling Elements on STM 21 RED

Control module STM 21 RED 5
B6_Control_SYS20_EN_V1.3.doc Art. Nr. 102-020401135 24 / 36
5. Control module STM 21 RED
5.1. Controlling elements on STM 21 RED
Control module STM 21 RED works with an active HIGH level. That means that a minimum of
+24V is required to activate a function. Protective inputs are activated in case of interruption. OV is
connected to the ground. This connection can be interrupted for test reasons by use of the ground
screw, located next to terminal 12. LED 1 (red) comes on.
Control module and power supply
ELEKTRIC SHOCK
 Electric shock, combustion, death when touching the power supply without
protection cover
 Before opening the metallic cover of the power supply unit, disconnect it
from the mains
 The installation may only be connected to the mains again, after the protec-
tion cover has been closed again.
5.2. Applications
Control module STM 21 RED is – according to the software implemented and the appropriate au-
thorization – used for the installations below.
The installations with the control module STM 21 RED work with a reduced func-
tionality
NOTE
Control module
STM 21 RED
Fused power
supply
DANGER