RLE LD5000 - Manual (Page 13)

User Guide: LD5000 Chapter 2: Connections and Settings
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2-1 DISPLAY BOARD
2-1.1 R2: Contrast
This dial adjusts the 4x20 LCD’s contrast. Turn the knob clockwise or counterclockwise to adjust the
contrast as necessary.
2-2 LEAK DETECTION BOARD
2-2.1 TB1: Input Power
This is a factory wired three position connector with the following connections (for reference only):
TB1-1 ground
TB1-2 24VDC negative (-)
TB1-3 24VDC positive (+)
2-2.2 TB2: Cable Interface
The Water Leak Detection Cable connects to TB2. A fifteen foot Non-Sensing cable is provided to connect
the LD5000 to the Water Leak Detection Cable. Connect the cable wires to TB2 as follows:
TB2-1 White wire
TB2-2 Black wire
TB2-3 Green wire
TB2-4 Red wire
2-2.3 TB3: 4-20mA Output
A 4-20mA loop powered output is provided on TB3.
Four mA = no alarm
Five mA = leak at 0 distance
19mA = full scale distance specified by SW2 positions 6-8 (see page 14)
20mA = cable fault
Connect the 4-20mA wires to TB3 as follows:
TB3-1 4-20mA positive (+)
TB3-2 4-20mA negative (-)
2-2.4 TB4 & TB5: Relays
Terminals TB4 and TB5 are Form C Relay Outputs. Each terminal has two outputs. TB4 provides a
connection to one of the leak alarm relay outputs and one of the fault relay outputs; TB5 provides a second
set of contacts for the same leak and fault alarms.
The six contacts on TB4 and TB5 are labeled Leak NO, Leak C, Leak NC, Fault NO, Fault C, and Fault
NC. Connect the alarm relay wires to TB4 and TB5 as follows:
TB4-1 Leak alarm normally open (NO)
TB4-2 Leak alarm common (C)
TB4-3 Leak alarm normally closed (NC)
TB4-4 Fault alarm normally open (NO)
TB4-5 Fault alarm common (C)
TB4-6 Fault alarm normally closed (NC)
TB5-1 Leak alarm normally open (NO)
TB5-2 Leak alarm common (C)