Pepperl+Fuchs LB Series User Manual

LB Remote I/O System
Installation
2018-07
45
Repeaters or fiber optic cables such as FOL7250* can be used to extend the cable length.
In accordance with DIN EN 61158 and DIN EN 61784, the following principles apply:
 Linear bus structure without branches, consisting of a cable with terminators
 Length of the spur to the node < 0.3 m
 Total length of all spurs < 6 m
 Data transfer via shielded twisted pair cable
 Terminator resistance 100  ... 130 
 Core cross-section > 0.22 mm², approx. 60 pF/m
 Max. cable length 1200 m, depending on the transfer rate
 Max. 32 active or passive nodes including repeaters
 Max. 3 repeaters between 2 nodes
Bus system Transfer rate Max. cable length
MODBUS 1.2 kbit/s ... 9.6 kbit/s 1200 m
19.2 kbit/s 1200 m
38.4 kbit/s 1200 m
115.2 kbit/s 1000 m
PROFIBUS DP 9.6 kbit/s 1200 m
19.2 kbit/s 1200 m
93.75 kbit/s 1200 m
187.5 kbit/s 1000 m
500 kbit/s 400 m
1.5 Mbit/s 200 m
PROFIBUS PA 31.25 kbit/s 1900 m
FOUNDATION fieldbus H1 31.25 kbit/s 1900 m
Service bus 9600 bit/s 1200 m
Example!
The following trip values result at rates below 93.75 kBit/s and with the cables connected in
series:
 0repeaters
• Max. cable length: 1200 m
• 1 master + 31 remote I/O stations, each with 48 I/O modules = 1488 I/O modules
 1 repeater
• Max. cable length: 2400 m
• 1 master + 61 remote I/O stations, each with 48 I/O modules = 2928 I/O modules

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)