GE LPS-O Instruction Manual page 195

8 LOCAL USER INTERFACE
8.4 REMOTE COMMUNICATION INTERFACE
There are hardware switches on the Input Board (see Section 3.3.5: INPUT BOARD on page 3–8) that inhibit
the Remote Breaker Operations, the Remote Settings Change, and the Remote Enable/Disable Outputs func-
tions. Please note that these switches are shipped from the factory in the down position and these functions
are enabled.
1. The proper sequence for setting these switches is as follows:
2. Remove four thumbscrews holding the plastic cover in place and lay aside with plastic cover.
3. Turn the power switch off on the front panel.
4. Remove DC power from the LPS-O.
WARNING: Completely power down the relay by disconnecting the control DC power and by
removing all voltage inputs to the rear terminals prior to opening the unit. Dangerous or
lethal voltages may be present inside the unit even if the power switch is OFF.
5. Remove the four 1/4" hex nuts at the four corners of the front panel and carefully remove the front panel.
6. Disconnect the power and the ribbon cables from the front panel and lay the panel aside
7. The Switches are located in the middle on the front edge of the board. Move the switches up to turn a func-
tion off. Figure 3–6: INPUT BOARD DIAGRAM on page 3–9 indicates the location of the jumpers on the
board.
8. Reinstall the PC board retainers with the four phillips head screws.
9. Reinstall the power cable and the bus card on the PC boards.
10. Reconnect the LUI ribbon cable and the power cable to the front panel and install the front panel with the
four 1/4" hex nuts.
11. Turn on the front panel power switch.
12. Restore DC power to the relay.
13. Reinstall the plastic cover with the four thumbscrews.
14. The hardware switches are defined below in Table 8–3: HARDWARE SWITCH DESCRIPTIONS.
Table 8–3: HARDWARE SWITCH DESCRIPTIONS
Switch
KBD EN ON
RM CHG SET ON
RM BRKR ON
When establishing communication between the relay and a remote PC, two modems connected by a phone
line are required. One modem is located at the relay and the other modem at the PC. The pin connections for
the cable that connects the modem with either the relay or the PC is shown in Figure 8–3. Both modems must
be "Hayes-compatible," meaning that they accept standardized modem configuration commands first devel-
oped by Hayes. This is necessary since the LPSO-Link communications software that runs on the PC sends a
GE Power Management
Function
Down position enables keyboard operations. Up position disables.
Down position enables remote settings changes. Up disables.
Down position enables remote breaker operations. Up disables.
LPS-O Line Protection System
8.4 REMOTE COMMUNICATION INTERFACE
8.4.1 HARDWARE SWITCHES
8.4.2 MODEM CONNECTIONS AND SETTINGS
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