Pepperl+Fuchs LB Series Manual page 33

LB Remote I/O System
Installation
Caution!
Damage to Equipment
Handling the connections improperly can damage the backplane.
Never supply a control voltage to X3.2 when the S1 switch is closed (S1.x = ON).

Only operate multiple adjacent backplanes using a common control voltage or a common

contact to avoid equalizing currents.
Figure 3.9
S1.1
ON
OFF
ON
X3.1 = 0 V

X3.2 = 12 VDC ... 24 VDC galvanically isolated control voltage (SELV/PELV),

Figure 3.4 on page 26, item 1
Control current = n x voltage / 5.6 K (where n = number of I/O modules equipped with a
shutdown input)
X3.1 to X3.3 for external, volt-free contact, galvanically isolated from other contacts and

potentials,
contacts from other backplanes, unless this involves interconnecting the base backplane
and the extension backplane,
information for the external contact can be read in using the LB1*08* I/O module.
1
X 3.1 3.2 3.3
Figure 3.10
1 Steuerung für 2 Backplanes
2 Steuerung für 2 Backplanes mit gemeinsamen Kontakt


1 2 3
1 2
X3 terminals and S1 function switches
S1.2
ON Deactivation of the I/O modules is disabled.
OFF Deactivation of the I/O modules equipped with a shutdown input is
controlled by a control voltage at X3.
OFF Deactivation of the I/O modules equipped with a shutdown input is
controlled by a voltage-free contact at X3.
see Figure 3.4 on page 26, item 2. This separation also applies to other
2
X 3.1 3.2 3.3 X 3.1 3.2 3.3
Steuereingang X3
Basis- und Erweiterungs-Backplane können entweder von 1 oder 2 gesteuert
werden.
2 Backplanes mit einem größeren Abstand können nur von 1 gesteuert werden.
4
3
see Figure 3.4 on page 26, item 3. The status
X 3.1 3.2 3.3
see
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