Pepperl+Fuchs LB Series User Manual

LB Remote I/O System
Commissioning
2018-07
51
Figure 4.2 USB converter in device manager
4.3 Startup Phase
Do not start to operate all the remote I/O stations simultaneously; instead, connect each
remote I/O station to the master in succession.
Ensure that the master read cycle and the com unit watchdog are coordinated with one
another. The duration for the transition to substitute values must be longer than the duration of
a bus cycle.
For the purposes of fault analysis, we recommend using a bus monitor that is capable of
passively monitoring data telegrams on the fieldbus.
Temporary Overload of the Power Supply
To avoid an overload of the power supply in the startup phase as a result of increased startup
currents, the number of certain I/O modules on the backplane is limited.
Use:
 A maximum of 11 LB3*, LB4*, and LB7* single-channel I/O modules.
Each of these I/O modules consumes 9.09 % of the startup capacity.
 Or a maximum of 8 LB3*and LB7* four-channel I/O modules.
Each of these I/O modules consumes 12.5 % of the startup capacity.

Pepperl+Fuchs LB Series Specifications

General

Mounting	DIN Rail
Zone	Zone 1, Zone 2
Power Supply	24 V DC
Protection Class	IP20
System Type	Remote I/O System
Communication Protocols	PROFIBUS DP
I/O Modules	Analog, Digital
Signal Type	Analog, Digital
Number of Channels	Varies by module
Intrinsic Safety	Yes
Isolation	Channel to channel, channel to system
Output Current	Varies by module (e.g., 0.5 A, 2 A)
Connection Type	Screw terminals
Dimensions	Varies by module
Weight	Varies by module
Temperature Range	-20 ... 60 °C (-4 ... 140 °F)