Eaton Crouse-Hinds F892 Instruction Manual

9INM F892 Rev 15 5 Field Segment ConnectionsThere are eight field segment connectors. Each connector provides (+), (–) and cablescreen (S) connections. See section 5.6 for screen grounding information.Pin No Connection Pin No Connection61 Segment 1 + 73 Segment 5 +62 Segment 1 S 74 Segment 5 S63 Segment 1 - 75 Segment 5 -64 Segment 2 + 76 Segment 6 +65 Segment 2 S 77 Segment 6 S66 Segment 2 - 78 Segment 6 -67 Segment 3 + 79 Segment 7 +68 Segment 3 S 80 Segment 7 S69 Segment 3 - 81 Segment 7 -70 Segment 4 + 82 Segment 8 +71 Segment 4 S 83 Segment 8 S72 Segment 4 - 84 Segment 8 -5 6 Cable Screen / Ground ConnectionsFor revision F 0 or higher units – Provisions have been made to facilitate tying the 8screens together and bringing them to the common Screen Ground terminal 8. Thisis a user selectable option that is determined based on the position of the jumperinstalled in the “Shield Ground Option” connector. Figures 7a and 7b illustrate the twopossible positions for the jumper. The carrier is delivered with the jumper installed asshown in figure 7b. As indicated in the text on the jumper, the screens are isolated.To tie the 8 screens together and route them to the SG terminal, remove, reverse andreinstall the jumper as shown in figure 7a. The arrow next to the text indicates whichdirection to install the jumper into the connector for the indicated function.When using the screen grounding facility on the F892 carrier, the jumper must beinstalled correctly (Figure 7a) and an Instrumentation Ground must be routed to Terminal8. Fieldbus segments require proper grounding in order to function properly.Figure 7a Figure 7bFor earlier units, the segment screens are not linked together nor tied to a commonground connection, so screen grounding must be done externally from the carrier. Thecarrier revision is on the board surface near the F892-CA model number (see figure2). No revision number existed before revision F.0. If the screens of the fieldbuscables are required to be earthed in the equipment cabinet housing the F892 system,a separate earth bar, connected to local instrumentation earth, should be used.