Cabling

Isolate cabling from rated voltage. Sizing and fusing of the wiring depends on the connected load.

WARNING
No internal line protection for supply lines to external consumers

Risk of fire and injury due to short-circuits!

  1. Adapt the wire cross sections as per local regulations to the rated value of the installed fuse.

 

Measuring hoses on the pressure sensor

Hoses are protected against damage during transport and installation in the interior of the control box. All common measuring hoses with a 4..8 mm internal diameter can be installed. The oval shape prevents unintentional disconnection of the measuring hoses. Ensure that the hose is properly seated.

Transformer

SEM62.2 transformers are single-phase split-bobbin safety transformers. On the primary side, the transformers are protected by a built-in PTC fuse. If the primary-side fuse trips, the fault condition on the secondary side must be cleared. When the transformer cools down, the fuse resets automatically and normal operation is resumed. Secondary power supply indication is provided via a green LED.

SEM62.2 has a secondary side on/off switch with replaceable fuse. Additional 24 V switches with fuses or the use of an additional circuit breaker is not necessary.

The selected transformer was matched to the use of connected sensors and actuators for fume hood control in accordance with the Siemens certificate for EN 14175. In other words, only products approved for fume hood control are permitted.

Relays

The relays have an AC 230 V 10 A changeover contact. A relay contact output is directly prewired for fume hood lighting using terminals. The second relay can be freely used for other functions.

WARNING
No internal line protection for supply lines to external consumers

Risk of fire and injury due to short-circuits!

  1. Adapt the wire cross sections as per local regulations to the rated value of the installed fuse.