MTL Instruments ZoneBarrier DS Specifications

• For 24V, 4-20mA current loop

applications

• Industrial Ethernet compatible

versions, UL Certified Cat.5

• Three stage protection including Gas

Discharge Tube and Silicon Avalanche
Diode technology

• Tested to IEC 61000-4-5 and CCITT

K17

• 10 year product warranty

technical datasheet

ZoneBarrier Data

Protects sensitive I/O ports against induced surges and transients

The ZoneBarrier Series is a uniquely
modular data and signal line protection
system for 24V, 4-20mA current loop
and Industrial Ethernet applications.

By providing an effective barrier between
uncontrolled transient environments and your
valuable electronic systems the ZoneBarrier
Series protects you from costly system down
time and equipment failure.

The sophisticated hybrid circuitry
employed by the ZoneBarrier Series

protects your equipment without impeding
normal operation. ZoneBarrier protection
components comprise a combination of high
energy Gas Discharge Tubes with ultra fast
diodes and Silicon Avalanche Diodes. This
combination of high quality surge protection
components gives the ZoneBarrier Series its
characteristic low let-through voltage and
high, 10kA, surge current capacity which
provides excellent protection. ZoneBarrier
devices have RJ45, terminal strip or pluggable
terminal strip connectors.

Designed for multi-loop or single
control loop applications the ZoneBarrier

Series offers a flexible surge protection
solution that is capable of growing with your
requirements. A ZoneBarrier module can be
used as a stand-alone device or as a building
block in a surge protection solution as simple
or as complex as your requirements, now and
in the future.

One simple manual operation clamps
modules securely onto DIN rail, an action

that also automatically provides the essential
high-integrity ground connection. Standard
‘Top-hat’ (T-section) DIN rail is generally
suitable for mounting ZoneBarrier Series
modules. Where a number of ZoneBarrier
Series modules are mounted on one rail, any
that are incorrectly mounted (and therefore
not securely grounded) are very obvious
and can easily be remounted correctly. The
ZoneBar rier Series also has two mounting feet
at either end of the unit, enabling mounting to
a flat surface such as a cabinet wall.

ZoneBarrier data and signal devices are
tested to IEC 61000-4-5 and CCIT T K17.

Industrial Ethernet compatible versions are
also UL Certified Cat.5 and UL 497B Listed.
ZoneBarriers come complete with a full 10
year product warranty.

Additional protection should be
provided for other systems which may be

inter-connected e.g. power feeds, telephone
wiring etc., other units are available for this
purpose.

901-137 Rev D 270110

www.mtl-inst.com [e-mail]

SPECIFICATION

Maximum load current

0.5 Amps
Maximum surge current
4-20mA versions 10kA
100Base-T versions 8kA (1kA per line)

Maximum leakage current

5µA at working voltage (4-20mA versions)

Maximum in line resistance

< 5 ohms

Bandwidth

4-20mA versions 0.5 MHz
100Base-T versions 155 MHz

Ambient temperature limits

–40°F to +185°F (working)
–40°C to +85°C (working)

Humidity

95% RH (non-condensing)

Casing

Molded plastic

Weight

2.8oz (0.08Kg)

Dimensions

See figure 1

EMC compliance

BS EN 60950: 1992
BS EN 61000-6-2: 1999

INSTALLATION

All ZoneBarrier modules are installed in-line
and are identified with “Protected” and “Un­protected” for fail-safe installation.

Model Type Lines Working

voltage

ZB24536 4-20mA 4 plus shield 24 30† 30 Terminal strip

ZB24539 4-20mA 2 plus shield 24 30† 30 Pluggable terminal strip

ZB24542 4-20mA 6 24 30† 30 Pluggable terminal strip

ZB24547 4-20mA 4 plus 2 shields 24 30† 30 Pluggable terminal strip

ZB24540 100Base-T* 8 5 10 N/A RJ45

ZB24550 100Base-T 2 x 4 5 10 N/A 2 x RJ45

(V)

Limiting

voltage

(V)

Maximum

continuous

operating

voltage

(V)

Connectors

DIN rail mounting (figure 2)

ZoneBarrier modules can be mounted on
any standard T-section DIN rail or on the
optional 19” DIN rail assembly. To attach the
ZoneBarrier module to the DIN rail, simply
locate the DIN rail foot of the module over on
edge of the DIN rail and then securely push the
ZoneBarrier onto the DIN rail. Note the DIN rail
must be properly grounded.

Stand-alone installation (figure 3)

To install a ZoneBarrier module as a stand­alone protector, attach an ground lead to the
supplied ring terminal and secure this with the
self tapping screw provided to the base of the
unit. Using screws (or bolts) mount the module
on any flat surface.

TO ORDER SPECIFY -

Model number as per specification table above

DIN rail mounting options

DR21607 5” DIN rail
for up to 4 ZoneBarriers
DR21649 17.5” DIN rail
for up to 16 ZoneBarriers
DR24500 19” DIN rail (with mounting
brackets) for up to 32 ZoneBarriers

Figure 1 Dimensions

Figure 2 DIN rail installation

APPROVALS

Figure 3 Stand alone installation

Country Standard/Authority Approved for Product

United States &
Canada

EUROPE (EM EA): [phone] THE AMER ICAS: [phone] ASIA-PACIF IC: [phone]

[e-mail] [e-mail] [e-mail] 901-137 Rev D 27/01/10

UL 497B Listed

Networks ZB24540

UL Certified TIA/EIA 568-A Cat.5

The give n data is only inten ded as a product de scription an d should not be reg arded as a lega l warranty of pro perties
or guara ntee. In the i nterest of fu rther te chnica l develop ments, we re serve th e right to make d esign ch anges.