RLE LD1500 V.3.1 - Manual (Page 15)

rletech.com LD1500 User Guide 15
2 Connections and Indicators
some gigabit switches; therefore, the LD1500 ships with switch SW1.1 in the UP, 100BASE-
T locked, position.
2.1.6 SW1.2:EIA-485 Termination
Switch SW1.2, when switched ON (DOWN), places a termination resistor across the + and -
terminals of the EIA-485 port. This is used when the LD1500 is the last unit on an EIA-485
network.
2.1.7 TB3: EIA-485 Modbus Port
TB4 connects to an 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
data bits, 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
2.1.8 P4: EIA-232 Connector
The EIA-232 uses a baud rate of 9600. The EIA-232 port is set to 8 data bits, no parity, and 1
stop bit (8, N, 1). A straight through cable should be used to connect a terminal or PC to the
LD1500. This connection should only be used for Setting of the IP address, advanced
diagnostics, firmware uploading, and troubleshooting only.Connections and Default Settings
2.2. Indicators
2.2.1 Status LED
The front panel of the LD1500 features a status LED. This LED blinks once every two seconds
to indicate the firmware on the LD1500 is running and active.