RLE LD5000 - Manual (Page 14)

Chapter 2: Connections and Settings User Guide: LD5000
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TB5-3 Leak alarm normally closed (NC)
TB5-4 Fault alarm normally open (NO)
TB5-5 Fault alarm common (C)
TB5-6 Fault alarm normally closed (NC)
Two LEDs, labeled Fault and Leak, are located between TB4 and TB5. They indicate the status of the
relays. The leak detection relay is activated when a leak is detected. The cable break relay is activated
when a cable fault is detected.
Both relays can be configured to be unsupervised or supervised. If the relay is set to supervised, the relays
will be closed as long as no alarm condition exists. A leak, cable trouble, or power failure will cause the
appropriate relay to open.
The relays can also be configured to latched or unlatched. A latched alarm requires a manual reset of the
system once a leak or cable problem is no longer present.
2-3 MICROPROCESSOR BOARD
2-3.1 TB1: RS-485 Connector
TB1 connects the RS-485 network. A grounded shield contact is provided for connection to shielded cable.
If the shield contact is used, verify the power connector is properly grounded and there is no voltage
potential between units on the network. The RS-485 port is set to no parity, 8 databits, 1 stop bit (n, 8, 1).
Connect the RS-485 wires to TB1 on the top PC board as follows:
TB1-1 A (+)
TB1-2 B (-)
TB1-3 Shield
2-4 INPUT POWER
The LD5000 mounted in the metal enclosure requires an 85-264VAC connection (2 wire & ground).
Connect the 85-264VAC to the input terminal block. Connect the 85-264VAC to the input terminal block.
2-5 POWER ON/OFF SWITCH
An internal power switch is used to power the unit on and off. This switch contains an integrated breaker
rated at two amps.
2-6 RS-232 CONNECTOR
The RS-232 port uses only the transmit, receive, and ground pins (2, 3 and 5). The manufacturer sets the
baud rate at 9600. The user may adjust the baud rate through SW2 on the microprocessor board. The RS-
232 port is set to no parity, 8 databits, 1 stop bit (n, 8, 1).A straight through cable should be used to connect
a terminal or PC to the LD5000.
Warning!
Do not apply power until connections are complete.