RLE LD2000 - Manual (Page 19)

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2 Connections and Settings
2.2.4 TB3: Summary Relay
Terminal TB3 is a Form C Relay Output. This relay provides alarm notification when a leak is
detected, a cable fault is detected, or a cable contamination is detected.
The three contacts on TB3 are labeled NO, C, and NC. Connect the alarm relay wires to TB3
as follows:
TB3-1 Leak alarm normally open (NO)
TB3-2 Leak alarm common (C)
TB3-3 Leak alarm normally closed (NC)
Both relays (all alarms) can be configured to be latched or unlatched. A latched alarm requires
a manual reset of the system once a leak or cable problem is no longer present; see 4.3.1,
“Leak Settings” on page 33 for configuration instructions.
2.2.5 P4: EIA-232 Connector
The EIA-232 uses a baud rate of 9600. The EIA-232 port is set to 8 databits, no parity, and 1
stop bit (8, N, 1). A straight through cable should be used to connect a terminal or PC to the
LD2000. This connection should only be used for setting the IP address, advanced diagnostics,
uploading firmware, and troubleshooting.
2.2.6 SW3: EIA-485 Termination
Switch SW3, when switched on (down position), places a termination resistor across the + and
- terminals of the EIA-485 port. This is used when the LD2000 is the last unit on a EIA-485
network.
2.2.7 TB4: EIA-485 Modbus Port
TB4 connects to a EIA-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 EIA-485 port is set to 8
databits, no parity, and 1 stop bit (8, N, 1). Connect the EIA-485 wires to TB4 as follows:
TB3-1 A (+)
TB3-2 B (-)
TB3-3 Shield
2.2.8 P3: RJ45 Network
A 10/100 BaseT Ethernet connection is available to connect the LD2000 on a local area
network. Use a crossover cable (shipped with the LD2000; blue cable with yellow ends) for
initial connection and configuration. The default settings are as follows:
IP Address: 10.0.0.188
Subnet Mask: 255.255.255.0