Pepperl+Fuchs LB Series User Manual

LB Remote I/O System
Product Specifications
2018-07
19
Figure 2.23 KF-CP coding pins
Watchdog Plugs
The watchdog plug is used with digital outputs with a feedback input (LB2101A ... LB2113E).
The watchdog plug sends the output signal from the I/O module back to its input channel,
making it possible to check the function of the I/O module, as well as the communication
between the process control system and the I/O module.
Figure 2.24 Block diagram for the LB9180A
Resistor Network
If binary I/O modules are used, for example with a mechanical contact, an additional resistor
network must be installed to ensure that the line fault detection function can work correctly.
Using the additional resistor network, the electronics can distinguish between a closed switch
and a short circuit.
Figure 2.25 Dimensions of the F-NR2-Ex1 resistor network
KF-CP
LB9180A
F-NR2-Ex1
Zone 1, 2
LB9180A
1 kΩ
-5
-6
4
2,4 kΩ
+
-
+
+
3
2
1
27
35150
Ø15.5

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)