TRICONEX 3720 Module parameters that

TRICONEX 3720 Module parameters that

Shielded Discrete I/O Routing and Shield Termination I/O Module (FTM & Similar, Relay Driver, etc.) in Cabinet  Use shielded cable from MicroNet module to I/O module  Ground cable shield, direct, at MicroNet module and I/O module  Locate I/O Module as close to field I/O cable entry point as possible  Locate I/O module away from analog I/O areas (> 152 mm / 6 inches)  Locate I/O module away from areas with unshielded discrete I/O (>152 mm / 6 inches) Field I/O Cable with I/O Module (FTM & Similar, Relay Driver, etc.) in Cabinet  Route I/O cable against cabinet metal wall/structure from cabinet entry point to I/O module;  If I/O cable is shielded, ground the I/O cable shield, direct, to cabinet at entry point. o If over braid shielded, ground over braid shield to cabinet - connect inner braid shields directly to earth ground at one point only o If single shield, ground shield to cabinet o If field I/O cable shield is grounded direct at remote end of cable, ground the I/O cable shield, capacitively at the entry point to the cabinet  I/O cable shield ground at the I/O module must be the same type as at cable entry point into cabinet, and it should be direct.

I/O Module  not in Cabinet

  Route cable from MicroNet module to I/O module with cable against cabinet metal wall  Ground “MicroNet module to I/O module” cable at entry point to cabinet and at the I/O module Field I/O Cable without I/O Module in Cabinet  Ground I/O cable shield, direct, at the I/O module o If over braid shielded, ground over braid shields to cabinet - connect inner braid shields at I/O module termination point. The Inner braid must still be directly grounded to earth at one point. o If single shield, ground shield to earth at the I/O module  If field I/O cable is grounded direct (DC coupled) at remote end of cable, ground the I/O cable shield capacitively at the I/O module.  I/O cable shield ground at the I/O module must be the same type as at cable entry point into cabinet, and it should be direct connected. 15.2.6.9—Unshielded I/O Unshielded I/O cables may only be used inside the cabinet or for very short distances near the control. Also short on engine sections of discrete inputs & Outputs may be use on the engine/turbine. Discrete I/O is the only I/O type that may be unshielded, for more details on this requirement please see the Discrete I/O MicroNet Module section

I/O Module (FTM & Similar, Relay Driver, etc.) in Cabinet

  Use Shielded cable from MicroNet module to I/O module.  Ground cable direct at MicroNet module and I/O module.  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) or other types of unshielded I/O. 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 cable types within 300 mm (12 inches) of unshielded discrete I/O cables if they are parallel for > 61 cm (2 feet)  Do not let other cable types 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. I/O Module (FTM & Similar, Relay Driver, etc.) not in Cabinet  Route cable from MicroNet module to I/O module with cable against cabinet metal wall.  Ground “MicroNet module to I/O module” cable at entry point of the cabinet and to the I/O module.

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