GE 369B1860G0028 Electrical module

The EGCP-2 is designed for shield termination to earth ground at the EGCP-2. If intervening terminal blocks are used in routing a signal, the shield should be continued through the terminal block. If shield grounding is desired at the terminal block, it should be ac coupled to earth. All other shield terminations except at the EGCP-2 should be ac coupled to earth through a capacitor. A 1000 pF, 500 V capacitor is sufficient. The intent is to provide a low impedance path to earth for the shield at frequencies of 150 kHz and up. Multiple direct connections of a shield to earth risk high levels of current to flow within the shield (exception, see note on cabinet installations).

Shields can be grounded 

at both ends (EGCP-2 and load) if the cable length is sufficiently short (that is, within a cabinet) to prevent ground loop current in the shield. Cabinet Installations: If the EGCP-2 is installed in a cabinet, shielded I/O can be terminated directly to the cabinet (earth ground) at the entry to the cabinet, as well as at the EGCP-2. For noise suppression reasons, it is recommend that all low-current wires be separated from all high-current wires. Input Power ground terminal should also be wired to earth ground

Input Power 

The EGCP-2 accepts any input power source that supplies a voltage within the 9-32 Vdc voltage range. It is expected that the installation of this equipment will include overcurrent protection between the power source and the EGCP-2. This overcurrent protection may be accomplished by series connection of properly rated fuses or circuit breakers (see the Input Power Ratings below for proper sizing).Significant inrush currents are possible when current is applied to the EGCP-2 control. The magnitude of the inrush current depends on the power source impedance, so Woodward cannot specify the maximum inrush current. Timedelay fuses or circuit breakers must be used to avoid nuisance trips.