MENU Catalog Global Sites
European manufacturer of sensors and instruments for liquids
You are in BAMO EU » Archives » Data processors » PKK
General Catalog 251-02
Multitask relay
Attention! You're watching an archived documentation :

You are in an old document of materiels which not manufactured and not marketed yet
Warning with their use...

• Galvanic isolation
• input 4-20 mA or potential free contact
• Intrinsic safety
• Settings on relay outputs
• Power supply to sensor


The PKK-312 is a 4-20 mA relay with galvanic isolation.
An intrinsic safety version is available.
The value of input signal is compared with setting value and change of galvanic insulation status, accordingly with the comparison mode in use.

Outputs are configurable according to various applications:

• Switching limit (high or low)
• Control ON/ OFF with setting on switching differential
• Comparative status mode with relay activation or deactivation
• Monitoring of discontinuity or broken loop

Instead of a 4-20 mA a dry contact can be connected to the input.
Status of this contact is copied and the output signal is then galvanically isolated PKK-312 allows the selection of time delays of 0.1; 1; 2; 5 s

Relay status diagram:

Operating modes of relay are programmed through the press buttons on the front, following indications of the LEDs.
One of the most important parameters is the relay operating mode "R":

When current input value is above the threshold:
If R = 1, relay output is activated
If R = 0, relay output is deactivated

Thus, for Drain/Fill or Hold temperature applications, the control mode (normal or reverse) can be assigned to the ON/ OFF function.



Code Reference Description
251 224 PKK-312-1 Relay, 230 V AC
251 227 PKK-312-4 Relay, 24 V AC/ DC
251 228 PKK-312-5-Ex Relay Ex, 230 V AC
251 230 PKK-312-7-Ex Relay Ex, 24 V AC/ DC
251 231 PKK-312-8-Ex Relay Ex, 24 V AC/ DC, for NIVOSWITCH Ex 2-wire

PKK-312-8 Ex is an intrinsically safe version designed for NIVOSWITCH
Ex-certified level detectors.

General Catalog 251-02
26/03/2022 19:25
Multitask relay
Technical & Commercial support's main contacts
Ask a QUOTATION online
BAMO Mesures SAS
22, Rue de la Voie des Bans
Parc d'activités de la Gare
95100 ARGENTEUIL France
Tel : +33 (0)1 30 25 83 32
Fax : +33 (0)1 34 10 16 05
Email :
Site :
Siret : 314 055 864
TVA Intra : FR 08 314 055 864
APE : 2651 B
Capital : 400 000 €
Designed and hosted by CARIMEDIA since 1998
© 1998-2022 All rights reserved - Disclaimer