Technical datasheet MN21

Product catalog summary

Specifications:
The document details the specifications for the MN21/MN21F and MN21G/MN21GF membrane level indicators used for bulk solids. These models do not require a power supply and feature an SPDT potential-free changeover contact with a maximum capacity of 2A at 250VAC. The mechanical life of the microswitch is at least 5 million cycles. The sensitivity range is standard from 15 to 25 mbar, and the protection rating is IP65. The housing is made of powder-coated aluminum, with an aluminum flange and EPDM & stainless steel membrane for MN21/MN21F, and natural rubber for MN21G/MN21GF. The ambient temperature range is -20 to +70°C for MN21/MN21F and -20 to +60°C for MN21G/MN21GF. The process temperature range is -40 to +85°C for MN21/MN21F.

Compliance and Standards:
The devices comply with several EU Directives, including RoHS (2011/65/EU), EMC (2014/30/EU), LVD (2014/35/EU), ATEX (2014/34/EU), and food contact compliance (1935/2004/EC). The ATEX protection type is II 1/2 Ex ta/tb IIIC T85°C IP65 Da/Db for MN21/MN21F and II 3 Ex tc IIIB T85°C IP65 Dc for MN21G/MN21GF.

Design and Features:
The document includes detailed drawings and dimensions, specifying available threads (G1/2, M20, 1/2NPT) and sensitivity adjustment options. The models feature a condensation filter and standard wiring options. An optional M12 circular connector can be added for quick electrical connections, rated for up to 150V AC/DC. An optional LED signal lamp can be added, available only with ATEX marking.

Wiring and Connections:
The wiring includes a spring terminal block with tension clamp spring connection, accommodating wire sizes from 0.13 to 2.5 mm² (IEC) or 26 to 14 AWG (UL). The document specifies the use of a 4-pole M12 circular connector for models with a G1/2 cable entry, and details the optional signal lamp configurations.

Catalog excerpts

EPDM MEMBRANE CONFIDENTIAL / PROPRIETARY DO NOT DISTRIBUTE EPDM MEMBRANE STAINLESS STEEL FOIL SENSITIVITY ADJUSTMENT } CAMLogic, 2023 - ALL RIGHTS RESERVED - STAINLESS STEEL FOIL STANDARD WIRING Model Type Membrane level indicator (bulk solids) 1,026/0,910 [Kg] Power supply No power supply needed SPDT potential free changeover contact Microswitch mechanical life Sensitivity range IP65 Aluminium (powder coated) Aluminium (counter flange AISI316) Membrane Ambient temperature range EPDM & Stainless steel (AISI 316) Process temperature range CONDENSATION FILTER CONDENSATION FILTER Standard from 15 to 25 mbar Protection Housing Signal output 2014/34/EU (ATEX) 1935/2004/EC (Food contact compliance) Via dell'Industria 12 42025 Cavriago (RE) - ITALY www.camlogic.it UNLESS OTHERWISE SPECIFIED DIMENSION ARE IN [mm] DRAWING FROM CAD SYSTEM - REFER TO 3D MODEL FOR MISSING DIMENSION - NO MANUAL MODIFICATION ALLOWED Ex type of protection (ATEX) II 1/2 Ex ta/tb IIIC T85°C IP65 Da/Db Ex type of protection (IECEx) Ex ta/tb IIIC T85°C IP65

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EPDM MEMBRANE CONFIDENTIAL / PROPRIETARY DO NOT DISTRIBUTE } CAMLogic, 2023 - ALL RIGHTS RESERVED - SENSITIVITY ADJUSTMENT STANDARD WIRING MN21G / MN21GF Membrane level indicator (bulk solids) 1,026/0,910 [Kg] No power supply needed Power supply SPDT potential free changeover contact Signal output Microswitch mechanical life Sensitivity range CONDENSATION FILTER CONDENSATION FILTER AVAILABLE THREADS: G1/2 - M20 - 1/2 NPT (max 2A / 250VAC) Minimum 5x10^6 cycles Standard from 15 to 25 mbar Protection Housing IP65 Aluminium (powder coated) Aluminium (counter flange AISI316) Membrane Ambient & process...

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- SIGNAL LAMP An optional LED lamp can be added to the level indicator, placed on top of the lid and connected to the NC contact. - SPRING TERMINAL BLOCK Tension clamp spring connection. No tool needed for wires connection. A single power supply voltage must be defined between: 24V (AC/DC), 48V (AC), 115V (AC) or 230V (AC). Not available with IECEx certification. Only available with ATEX marking: II 3 Ex tc IIIB T85°C IP65 Dc 61 - M12 CIRCULAR CONNECTOR It is possible to add the 4-poles M12 circular connector, for a quick and reliable eletrical connection. It is mounted through a G 1/2 reduction...

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