Jola Spezialschalter K. Mattil & Co. KG
Klostergartenstraße 11-20
D-67466 Lambrecht
Phone: +49 63 25 / 188-01
 
Level controllers Leakage detectors Other Jola products Search via product names Control of the chemical resistance
General information on Jola Quality management system Addresses: Jola and its agents Help on CD-ROM catalogue
Contact protection relay

KR 5/Ex
I (M1) / II (1) GD [EEx ia] I / IIC 

  • for signalling a limit level (1 contact) or 
for two-point control (2 contacts)

  
Alternative supply voltages (terminals 15 + 16):
- AC 230 V (delivered if no other supply voltage is specified in the order) or
- AC 240 V or
- AC 115 V or
- AC   24 V

Power input: approx. 3 VA
Control circuit (terminals 1,6,7): 3 terminals (under safety extra low voltage) acting 
on 1 relay with self-hold 
Contact connection: according to EN 50 227, NAMUR
- no-load voltage: DC 8.4 V (safety extra low voltage)
- short-circuit current: < 10 mA 
- response hysteresis: 1.5 mA to 1.8 mA
Controlled circuit (terminals 9,10,11): 1 potential-free changeover contact with self-hold 
Principle: quiescent current principle
Switching status indicators: 
- 1 green LED lights when relay is energised
- 1 red LED lights when relay is not energised


EC type examination certificate: INERIS 03ATEX0150
Brochure Mercury-free floating switches and immersion probes [PDF]
Switching voltage AC max. 250 V
Switching current AC max.  4 A
Switching capacity AC max.  100 VA
Mounting orientation any
Housing 
insulating material, 75 x 55 x 110 mm
Connection: terminals on top of housing
Protection class: IP 20
Mounting: clip attachment for U-bar to DIN 46 277
and DIN EN 50 022 or fastening via two boreholes
Temperature
application range 
- 20° C to + 60° C
Documents for application
in explosive atmospheres 		EC type examination certificate [PDF]
EC Declaration of Conformity [PDF]
Installation, operating and maintenance instructions [to the language selection] 
The Jola protection relay KR 5/Ex  I (M1) / II (1) GD [EEx ia] I / IIC 
is designed to transmit control commands from an intrinsically safe control current circuit in 
line with EN 50 014 and EN 50 020 to a non-intrinsically safe active current circuit. It must
be installed outside potentially explosive areas in compliance with the relevant standards
and regulations.

Ex ia approved command transmitters, e. g. floating switches types 
SI/SSP/NL/1/K/... Variante 0  I M2 / II 2 G Ex ia I / IIB T6, may be used in the intrinsically 
safe control current circuits in compliance with the relevant standards and regulations.

Protection relay for U-bar mounting or surface mounting, with connection terminals on top 
of the housing and with 2 built-in LEDs for signalling the respective switching status.

The appliances are designed for switch cabinet installation or for mounting in an
appropriate protective housing outside potentially explosive atmospheres and may
therefore not be installed in other locations. They are only suitable for use in clean
environments.

Max. cable length between protection relay and contacts: to be clarified by the customer 
in consultation with the competent technical monitoring organisation for the application in 
question.

EMC: for interferences emission in accordance with the appliance-specific requirements for 
households, business and commerce as well as small companies, and for interference 
immunity in accordance with the appliance-specific requirements for industrial companies.

VDE marks licence certificate: 40021161

 
Measure drawing
Basic circuit
Top