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Terminal Blocks Overview
Product Family Overview
The XB Series offers a complete
terminal block system with a
universal range of accessories.
Marking, bridging and testing
accessories are standardized
across the different clamping
technologies—reducing inventory
and logistics costs. The modular
terminal block design allows for use
of the different terminal block types
together or individually, providing
the highest degree of flexibility.
Application Description
The metal portion of the XB
Series terminal blocks are made
from highgrade, strain-crack and
corrosion-proof copper alloys. They
won’t experience any electrolytic
corrosion or rusting, even when
moisture is present. The metal
surfaces are protected with a leadfree, galvanic nickel or tin plating.
The good electrical conductivity
permits only a low temperature
rise. The Polyamide 6.6 housings
allow for operating temperatures
up to 125°C and are certified
for inflammability Class V0 in
accordance with UL 94.
XBUT4RD
XBUT4WH
XBUT4
All models shown smaller
than actual size.
XBUT4BU
Features
Global Acceptance— The XB
Series terminal blocks are designed
to meet worldwide standards
and the latest international
requirements.
Flexible Plug-In Bridge System—
All 3 technologies (screw, spring
and IDC) use the same bridge
system, allowing for individual
potential distribution and quickly
bridged connections among the
same terminal block type or across
different types. The XB Series
terminal blocks have 2 bridge shafts
arranged in 1 line, making flexible
chain bridging and skip bridging
between non-adjacent terminal
blocks possible. Plug-in bridges are
available from 2 to 50 positions.
Reducing bridges are also available
to connect a larger terminal block to
a smaller one.
Large Surface Area for Marking—
All XB Series terminal blocks have
generously sized surface areas
for labeling. This allows for clearly
labeled wiring which results in
reduced start-up time and simplifies
activities such as testing and
maintenance. There are provisions
for marking individual terminal
blocks and end stops, strips of
terminal blocks, and large groups of
terminal blocks.
Standardized Testing System—
All test plugs make contact in one
of the easily accessible bridge
shafts. A 2.3 mm diameter test plug
is available for individual measuring
wires. Modular test plugs are also
available for more advanced testing.
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XBUT4BK
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XBAFBS506
SPECIFICATIONS
Insulation Material: Polyamide 6.6
Dielectric Strength: 600 kV/cm
Creep Resistance: 600 CTI
Internal Insulation Resistance: 1012
Surface Resistance: 10
Flammability Rating: UL 94 V0
Continuous Operating Temperature:
-40 to 125°C (-40 to 257°F)
STANDARDS AND CERTIFICATIONS
UL and cUL Recognized: File no.
E67464; CE approved
LVD*: EN 60947-7-1, EN 60947-7-2,
EN 60998-2-3, EN 60352-4/A1
ATEX Approval: Eex e applications
* Not all standards apply to all
terminal blocks.
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XBAFBS105
XBAFBS210
All models shown
smaller than actual size.
XBAFBS25
XBANS3575P
XBUT25
Modular Terminal Blocks for
Potentially Explosive Environments
The standard modular terminal
blocks are approved for potentially
explosive environments. In addition
to the usual approvals, they also
have been approved by a testing
center authorized by the EU. No extra
approval is required in intrinsic safety
type applications. Modular terminal
blocks on the internet address
listed below fulfill the requirements
for “increased safety” protection
type when installation instructions
are followed, and have a type
examination certificate in accordance
with the Ex directive Ex-RL 94/9/EU.
These test certificates are recognized
in all the EU member states and
beyond.
The modular terminal blocks are
approved for fitting in Zone 1, the Ex
environment, as well as Zone 2. Zone
1 fitting is conditional upon terminal
blocks being used in connection
boxes approved for EEx e type
protection and having the equivalent
of at least IP54 protection.
The EEx approved modular
terminal blocks can be divided into
the following groups:
l Screw connection terminal
blocks
l Spring-cage connection terminal
blocks
l Insulation displacement
connection terminal blocks
l Mini terminal blocks
l Terminal blocks for specialized
applications
Identification
Explosion protected electrical
equipment must be marked so
that the safety characteristics are
identifiable. The identification of
electrical equipment is described
in the harmonized standard EN
50014, as shown in the following
example:
TABLE 55-1. EN 50014
STANDARD EXAMPLE
Type Designation XBUT25
Abbreviation of
Explosion Protection EEx e ll
Protection Type Increased
Safety “e” e
Equipment Group II
Mark of the Testing Body KEMA
Approval Number 05ATEX2158 U
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Identification in Accordance
with ATEX-RL
Electrical equipment that is certified
in accordance with the ATEX 100a
guideline also receives identification
describing the site for use.
TABLE 55-2. ATEX GUIDELINE
EXAMPLE
Manufacturing Data 02.01.2004
Address of the
Manufacturer Duncan, SC
Number of the
Appointed Dept 344
Common Marking Ex symbol
Equipment Group II
Category 2
Use in Gas and/or
Dust Atmospheres G D
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XBUT4RD
SPECIFICATIONS FOR XBUT4
Terminal Width: 6.2 mm
Maximum Wire Size: 10 AWG/4 mm2
IEC 60 947-7-1 in V/A/AWG: 800/41/26-10
EN 50 0191 in V/A/AWG: 750/30 or 38/26-10
UL-cUL Ratings in V/A/AWG: 600/30/26-10
TECHNICAL DATA DIMENSIONS
Width/Length/Cover Width in mm (inch):
6.2 (0.24)/46.9 (1.85)/2.2 (0.09)
Height for 35 x 7.5/35 x 15 in mm (inch): 47.5 (1.87)/55.0 (2.17)
TECHNICAL DATA IN ACCORDANCE WITH IEC
Maximum Load Current in A/Cross-Section in mm
Rated Surge Voltage in kV/Contamination Class: 8/3
Surge Voltage Category/Insulating Material Group: III/I
Connection Capacity
Stranded with Ferrule/with Ferrule and Plastic Sleeve in mm
0.25 to 4/0.25 to 4
MULTI-CONDUCTOR CONNECTION (SAME CROSS-SECTION)
Solid/Stranded in mm2: 0.14 to 1.5/0.14 to 1.5
Stranded with Ferrules without Plastic Sleeve in mm2: 0.25 to 1.5
Stranded with Twin Ferrule with Plastic Sleeve in mm
Stripping Length in mm (inch): 9 (0.35)
Thread: M3
Torque in in-lb (Nm): 0.6 to 0.8 (5.3 to 7.1)
2
: 41/6
2
:
2
: 0.5 to 2.5
XBUT4WH
All models
shown smaller
than actual size.
XBUT4BU
To Order
MODEL NO. DESCRIPTION
XBUT4 Gray single level connection
XBUT4BU Blue single level connection
XBUT4OR Orange single level connection
XBUT4YE Yellow single level connection
XBUT4RD Red single level connection
XBUT4WH White single level connection
XBUT4BK Black single level connection
XBUT4GN Green single level connection
ACCESSORIES
XBACUT10 Gray end cover
XBATUT10 Gray partition plate
XBAFBS26 Red 2 position plug-in bridge
XBAFBS36 Red 3 position plug-in bridge
XBAFBS56 Red 5 position plug-in bridge
XBAFBS106 Red 10 position plug-in bridge
XBAFBS506 Red 50 position plug-in bridge
XBATSPAI4 Test adaptor
XBMZB6 5.2 mm white blank marker strip
XBANS3575P DIN rail 35 x 7.5 mm x 2 m (1.4 x 0.30" x 6.6') slotted
XBANS3575U DIN rail 35 x 7.5 mm x 2 m (1.4 x 0.30" x 6.6') solid
XBANS3515P DIN rail 35 x 15 mm x 2 m (1.4 x 0.60" x 6.6') slotted
XBANS3515U DIN rail 35 x 15 mm x 2 m (1.4 x 0.60" x 6.6') solid
XBAES35C 1-screw mounted end stop
XBAES35T 3-screw mounted end stop
XBAES35N Snap-on end stop
Note 1: EU type-examination certificate number KEMA 05ATEX2158U.
Ordering Example: XBUT4, blue terminal block, XBUT4RD, red terminal block, XBANS3575P, DIN rail.
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