Leuze electronic MSI 400 Operating Instructions Manual page 86

Line resistance
Maximum permissible coil energy
without external protection ele-
8
ments
Hardware version V1.00
Hardware version V1.01
Response time
Data interface
1
When safety outputs are being used without test pulses, then either all of the safety outputs without test
pulses must be switched off at least once a year simultaneously for at least one second or the MSI 400
system must be restarted by switching off the supply voltage.
2
Do not connect any other safe inputs in parallel when the reverse current could lead to a HIGH state at the
other input.
3
In the event of a fault (interruption in the 0 V line), the maximum of the leakage current will flow in the
OSSD line. The downstream control element must determine this state as being LOW. An FPLC (Failsafe
Programmable Logic Controller) must be able to detect this state.
4
When activated; in that case, the outputs are tested regularly (brief LOW switching). When selecting the
downstream control elements, make sure that the test pulses will not cause switch-off with the previously
listed parameters or deactivate the test pulses at the outputs.
5
When safety outputs are being used without test pulses, then either all of the safety outputs without test
pulses must be switched off at least once a year simultaneously for at least one second or the MSI 400
system must be restarted by switching off the supply voltage.
6
If safety outputs are being used without test pulses:
Use shielded or separate cabling for safety outputs the test pulses of which have been deactivated, be-
cause a short-circuit to 24 V will not be immediately detected if the output is HIGH. In the event of a detec-
ted internal hardware error, this could affect the ability to switch off the other outputs through reverse cur-
rent.
7
Limit the line resistance of the individual lines to the downstream control element to this value in order to
ensure that a short-circuit will be reliably detected between the outputs. (Also see EN 60204, Safety of ma-
chinery - Electrical equipment of machines - Part 1: General requirements.)
8
Examples of the resulting maximum coil induction:
HW V1.00: 1760 mH @ 0.5 A, 440 mH @ 1 A, 110 mH @ 2 A
HW V1.01: 2960 mH @ 0.5 A, 740 mH @ 1 A, 185 mH @ 2 A
Leuze electronic
MSI-EM-IO84
7
Max. 5 Ω (e.g. 100 m × 1.5 mm² = 1.2 Ω)
0.22 J
0.37 J
Depends on logic setup
(Details: System response times [chapter 12.1])
Internal safety bus
MSI 400
Technical data
86