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
Limit value switching unit

SKG 420

 
  • for current input 4 ... 20 mA

  
Alternative supply voltages
AC versions : terminals 15 + 16;
DC versions : 
terminal 15 = - 
terminal 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

- DC   24 V or
- DC   12 V (in these two cases, the unit must only be connected to a low safety voltage
                 which corresponds to the safety regulations relating to the application)

- further supply voltages on request

Power input: approx. 3 VA
Setting of switching point: via soft-touch coding switch in the range from 0-99 %
Switching status indication: 2 red LEDs for signalling when the value is below or above
the limit value
Reproducibility: approx. 1%
Controlled circuit: one single-pole potential-free changeover contact
Brochure TSK - MWU - SKG System continuous liquid level indicator
Housing 
insulating material, 75 x 55 x 110 mm
Connection: via 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 2 boreholes to
DIN 46 121 and 43 660
Mounting orientation any
Power input approx. VA/W 3
Input signal (current) 4 ... 20 mA
Current input resistance 50 Ohm
Switching voltage AC max. 250 V
Switching current AC max.  4 A
Switching capacity AC max. 500 VA
Temperature resistance 
- 15° C to + 60° C
 
Switching units for U-bar mounting or surface mounting with connection terminals on top and
soft-touch coding switch.

The units are designed for switch cabinet mounting or installation in a suitable protective
housing only and may therefore only be mounted/installed in these locations.
They are suitable for use in clean environments only.

Mode of operation:

If the input is a current between 0 ... 20 mA or 4 ... 20 mA, the input terminals I and GND 
are to be used.

A limit value can be set within a range of 0 to 99 % using the soft-touch coding switch.

If the input is below the set limit value, the output relay is energised; if the input is
above the limit value, the output relay is de-energised (quiescent current principle).

The respective switching status of the output relay is indicated by LEDs.

EMC: for interference 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.
Measure drawing
Top