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Furse, Wilford Road, Nottingham, NG2 1EB • Tel: +44 (0)115 964 3700 • Email:
enquiry@furse.com• Web:
www.furse.comESP RS485, RS485Q & SL RS485 Series
NEW
Very low let-through voltage (enhanced protection to BS EN 62305)
between all lines - Full Mode protection
Full mode design capable of handling partial lightning currents as well
as allowing continual operation of protected equipment
Repeated protection in lightning intense environments
45 MHz bandwidth greatly exceeds 12 Mbps maximum speeds
Low in-line resistance minimises reductions in signal strength
Suitable for earthed or isolated screen systems
Built-in DIN rail foot for simple mounting to top hat DIN rails
Convenient earthing through DIN foot and/or earth terminal
ESP RS485 can be flat mounted on base or side
ESP RS485 and ESP RS485Q have colour coded terminals for quick and
easy installation check
ESP SL RS485 has ultra slim 7 mm width ideal for compact protection of
large numbers of lines (e.g. process control installations)
ESP SL RS485 includes two stage removable protection module with
simple quick release mechanism allowing partial removal for easy line
commissioning and maintenance as well as full removal for protection
replacement
ESP SL RS485 includes optional LED status indication - add L suffix to
part number - i.e. ESP SL RS485L
Features and benefits
Combined Category D, C, B tested protector (to BS EN 61643)
specifically designed for RS 485 and Fieldbus applications, such as
Profibus DP. For use at boundaries up to LPZ
0
A
(ESP RS485 &
ESP RS485Q), or LPZ
0
B
(ESP SL RS485) protect against flashover
(typically the service entrance location) through to LPZ 3. Available
as standard ESP RS485 format, or compact ESP RS485Q and Slim Line
ESP SL RS485 versions for installations where a high number of lines
require protection.
Replacement module for
ESP SL RS485
ESP SLRS485/M
Standard module replacement
ESP SLRS485/B
Base replacement
Combined Mounting/Earthing kits
for ESP RS485
CME 4
For up to 4 x ESP RS485
CME 8
For up to 8 x ESP RS485
CME 16
For up to 16 x ESP RS485
CME 32
For up to 32 x ESP RS485
For weatherproof enclosures, see
page 263, or contact us.
Accessories
Connect in series with the signal
line either near where it enters or
leaves the building or close to the
equipment being protected
ensuring it is very close to the
system’s earth star point. Install
protectors either within an
existing cabinet/cubicle or in a
separate enclosure.
Installation
LPZ
RS485
0
A
3
RS485Q
0
A
3
SL RS485
0
B
3
ESPRS485
ESPRS485
DIRTY
CLEAN
From
line
To
equipment
Earth
1
S
2
3
S
4
LightningBarrier
From line
LINE
CLEAN
Earth
To equipment
Furse
Wilford Road,
Nottingham,
NG21EB,UK
Clean
Line
Nominalvoltage
Maxworking voltage,U
c
Current rating
In-line resistance
Maxsurge current
Let-throughvoltage,U
p
30V
36.7V
750mA
1.0
Ω
20kA
63V
ESP RS485Q installed in series (in-line)
ESP SL RS485 installed in series
ESP RS485 installed in series
DIRTY
CLEAN
From
line
To
equipment
Earth
The ESP SL ‘Slim Line’ Series is also available for protection of 3-wire and RTD applications
(ESP SL/3W & ESP SL RTD). The ESP SL X Series has approvals for use in hazardous areas.