HONEYWELL K4LCN-16 51403519-160n03W31-s0082 size of the industrial card thing

HONEYWELL K4LCN-16 51403519-160n03W31-s0082 size of the industrial card thing

 Connecting DGND to Protective Earth indirectly, AC coupling, via intentional filter capacitance.  Connecting the field device’s power or its power reference to Protective Earth with transient limiting devices like a Metal Oxide Varistor or Transient Voltage Suppression Diode.  Stray Coil capacitance from the actuator coil to the shaft or housing on multiple actuators and grounding the shaft or housing due to the attachment mechanisms.o 4 places minimum (4 corners), 6 places preferred — 4 corners + 2 midpoints preferred.  Cabinet doors must be electrically connected to the main structural frame (<2.5 mΩ). o 2 places minimum, 3 places preferred. o Use of 25 mm (1 inch) wide bond straps is preferred. o Install bond straps at the locations that I/O cables cross the door hinge. If no cables cross the hinge point, locate bond straps to break up the size of gaps/openings in the metal structure to door interface.  Cover panels shall be electrically connected to structural frame (<10 mΩ). o 1 place minimum, 2 places preferred (placed at opposite sides)

VME Module Cable Shield Grounding

 In all cases, the cable from the VME module (MicroNet I/O Card) to the FTM module or relay box for field wiring may have an additional ground point added. Only commercial Marine applications have strict requirements to add it. In EMC environments where sensitive equipment coexists or harsh conditions like high current or high voltage noise exist, the additional ground will help with noise suppression and immunity. The insulation on the cable between the MicroNet and FTM or relay box must be removed to expose the shield, being careful not to cut the shield or nick the inner insulation layers. A metal "P-clip" or similar clamping mechanism is used around the cable shield to ground the shield within 300 mm (12 inches) of the FTM or relay box. The grounding mechanism should be galvanically compatible with the tin-plated copper shield inside, as well as the grounding point in the cabinet (mounting panel). Typically metal "P-clips", annealed for some spring tension, made of either stainless steel or tin-plated copper are readily available commercially and are acceptably compatible.

Cabinet Structural Grounding

  The cabinet needs to be a six-sided metal enclosure. o Do not use cabinet doors with unshielded windows—doors should be solid metal as possible.  If a window in the cabinet door is needed, the window must provide >20 dB of RF attenuation from 10 kHz to 1 GHz.  The enclosure floor and/or top must provide holes for cable entry, only the floor or top panels may be used.  Top and bottom cable entry areas must be restricted in size, largest dimension of any aperture (hole) no greater than 152 mm (6 inches). This is particularly important when RF transmitters, like push to talk radios or cell phones, can be located near the cable access areas.  When RF transmitters (hand-held radios) can be located below the plane of the floor, in the metal cableway area, floor entry areas shall be restricted in size, with largest dimension of any aperture (hole) no greater than 152 mm (6 inches).  When RF transmitters (hand-held radios) cannot be located below the plane of the floor, in the metal cableway area, no floor entry areas restrictions are required.  The cabinet frame and mounting areas must be bonded (grounded together).  All MicroNet chassis mounting screws (#8-32 M4) should be installed to properly ground the chassis to the mounting plate.  Frame shall be electrically connected at each structural interface (<2.5 mΩ).  Mounting plates shall be electrically connected to structural frame (<2.5 mΩ).

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Spare parts spare parts, the DCS control system of PLC system and the robot system spare parts,

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