EUCHNER MSC - 9.2.1.2. Safety output (SINGLE_OSSD)

Operating Instructions
Modular Safety Control System MSC
82
(Translation of the original operating instructions) 2121331-04-04/19
The Error OUT signal is reset if one of the following events occurs:
1. The system is switched off and on again.
2. The RESET MSC-CB operator is activated.
Figure 62: Example for OSSD with correct
feedback signal: in this case ERROR
OUT=FALSE
Figure 63: Example for OSSD with erroneous feedback
signal (external switching time exceeded): in
this case ERROR OUT=TRUE
9.2.1.2. Safety output (SINGLE_OSSD)
The OSSD safety output does not require any maintenance.
Output1 supplies 24 VDC with an input of "1" (TRUE) and 0 VDC with an input of "0" (FALSE).
Figure 64: SINGLE_OSSD
¨ Each SINGLE_OSSD output has a corresponding RESTART_FBK input. This input must always be connected as described
in the paragraph RESTART_FBK.
Parameter
Output Type: two different types of outputs are available:
Ì Single outputs
Ì Dual channel outputs
With the aid of the module AH-FO4SO8, the operator can choose between the following different configurations:
1. Four SINGLE_OSSD function blocks (single output)
2. Two SINGLE_OSSD function blocks (dual-channel output)
3. Two SINGLE_OSSD function blocks (single output) + one SINGLE_OSSD function block (dual-channel output)