
170 BNO 681 00 Module Description
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Width: 178 mm
Height: 216 mm
20
4.2 Mechanical Design
The modules have a flat plastic housing that can be affixed on a DIN mounting rail,
or be fastened with only 2 screws to a wall or machine housing. The housing is
narrower than the other Momentum modules. With the mounting rail installation
additional fixation measures are unnecessary, as a stopper mounted in the
housing back panel prevents sideward slippage. A spring integrated in the back
panel accomplishes the electrical grounding to the mounting rail.
There are ventilation slits above and below the identification inlay, so that sufficient
natural cooling convection is provided for vertical mounting.
The following diagnostic and status LEDs are located in the slits below the
identification inlay (for the position and significance refer to Figure 4 ”170 BNO
681 00 status LEDs”):
H 1 LED shows the state of the relay output (REL)
H 5 LEDs for bus diagnosis (BA, RC, RD, LD, E)
H 1 LED for power monitoring (ready)
H 2 LEDs indicating light level (WR, WG)
The device can be exchanged simply on failure, as the cabled terminal strips can
be unplugged without tools. The identification inlay can be easily loosened with a
screwdriver and exchanged to the replacement device.
Note
The 170 BNO 681 00 fulfills the IP20 safety class specifications. These modules
must be installed in closed service cabinets within electrical equipment bays.
During work on the service cabinets the user must follow the appropriate
maintenance precautions to prevent module damage through electrostatic
discharge.
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