IS200TREAH2AED Gas turbine card using the process

IS200TREAH2AED Gas turbine card using the process

I/O Module (FTM & Similar, Relay Driver, etc.) in Cabinet  Use Shielded cable from MicroNet module to I/O module (FTM)  Ground the module to FTM cable shield, within 152 mm (6 inches) of I/O module (see Figure 15-8)  Locate I/O module as close to field I/O cable entry point as possible  Locate I/O module away from sensitive analog areas (>152 mm / 6 inches) I/O Cable with I/O Module (FTM & Similar, Relay Driver, etc.) in Cabinet  Route I/O cable against cabinet metal wall from entry point to I/O module;  Do not let other cables within 300 mm (12 inches) of unshielded discrete I/O cables if they are parallel for > 61 cm (2 feet)  Do not let other cables within 152 mm (6 inches) of unshielded discrete I/O cables if they are parallel for less than > 61 cm (2 feet)  Limit length of unshielded I/O cable inside the cabinet. Any length over > 61 cm (2 feet) is too long  If lengths greater than > 61 cm (2 feet) are required, special considerations should be used to separate this unshielded wiring from other circuits and minimize electromagnetic RF emissions.

Third Party Hardware

 CE Compliant to Light Industrial Levels  Locate inside the cabinet, away from all I/O cables that enter or exit the cabinet by > 300 mm (12 inches)  Locate from all other cables > 152 mm (6 inches) away  Use only CE compliant devices CE Complaint to Industrial Levels  Locate based on Zoning restrictions 15.2.9—Ethernet I/O Connections  Use Shielded Twisted Pair (STP) category 5 Ethernet cable  Route Ethernet cable away from all other Internal cabling and external I/O cabling  Ground internal Ethernet cable at the CPU card and at the entry point to the cabinet  If external Ethernet cable is grounded direct at remote end of cable, ground the external Ethernet cable shield capacitively. See Ethernet FTM in Chapter 13 Figure 13-54. 15.2.10—CAN I/O Connections  A shielded CAN cable as defined in section 6.2.10 of volume 1 of this manual.  Route the CAN cable away from all other Internal cabling and external I/O cabling.  Ground the internal CAN cable shield at the entry point to the cabinet.  AC couple the CAN cable shield to earth at each of the CAN devices external to the MicroNet cabinet.  AC couple the CAN cable shield to earth at each of the CAN devices internal to the MicroNet cabinet.

Connection of Cabinet to Installation Ground

  Ensure the cabinet enclosure is electrically grounded to the plant ground system. Use as large a conductor as is possible. Use plant guidelines. 15.2.12—DIN Rail Grounding  Provide Chassis ground to FTMs using a DIN rail ground clip.  Install one each of these clips at the FTM end closest to the Earth ground connection point.  Use largest gauge wire allowed by Clip and FTM.  Maximum length of ground wire shall not exceed 5 cm (2 inches)Equipment Bonding  DIN rail shall be electrically connected to structural frame (<2.5 mΩ) once every 30 cm (12 inches).  Use a minimum of 2 screws to bond a DIN rail to cabinet frame.  Equipment chassis shall be electrically connected to structural frame (<2.5 mΩ). 15.2.14—Safety Ground Wire Installation  Safety wires shall be routed against the grounded cabinet structure. Locate safety ground wire 15 cm (6 inches) from unshielded cabling, 77 mm (3 inches) from internal shielded cabling, and 15 cm (6 inches) from any I/O cabling exiting the cabinet.  Safety ground/Protective earth wire should be routed from power input connections to the source of power. These wires should be routed with the power wires. Optimally power wires should be twisted, minimally they should be routed in direct contact with each other & bundled per input group.

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