Busbars
Original instructions
About us
Overview
This section describes:
Function
A busbar may be plugged into the fourth row of an I/O base. Busbars provide a common connection for the field devices and serve as protective distribution connectors, for instance to PE. Each row of terminals on the busbar is connected internally. There is no electrical connection to the I/O base.
Types
Depending on the I/O base and the type and number of field devices to which it is connected, a 1-, 2-, or 3-row busbar may be used.
They are available in screw-in and spring-clip versions.
Specifications
Busbars have the following specifications:
Busbar type
Screw-in
Spring-clip
Max. load at 20 deg. C
250 V
14 A
250 V
17.5 A
Short circuit
100 A 30 s
100 A 30 s
Test voltage
2.2 kV
2.2 kV
Creepage / air dist.
per IEC 664A
per IEC 664A
Pollution
Degree 2
Degree 2
Contact derating at 70 deg. C
ca. 60% of nominal value
ca. 60% of nominal value
How to Choose a Busbar
See the internal pin connections and field wiring diagrams associated with your I/O base to determine whether or not you need a busbar and which busbar best suits your needs.
Ordering Information
Busbars should be ordered separately. They are not shipped with I/O bases.
Busbar Type
Part Number
# of Rows
Wire Size
Screw-in
170 XTS 006 01
1
If one wire, use 10AWG (4mm2) max.
If two wires, use 14AWG (2.5mm2) max.
170 XTS 005 01
2
One or two wires 14AWG (2.5mm2) max.
170 XTS 004 01
3
One or two wires 14AWG (2.5mm2) max.
Spring-clip
170 XTS 007 01
1
If one wire, use 10AWG (4mm2 max.
If two wires, use 14AWG (2.5mm2) max.
170 XTS 008 01
2
One or two wires 14AWG (2.5mm2) max.
170 XTS 003 01
3
One or two wires 14AWG (2.5mm2) max.