RLE LD5100 - Manual (Page 21)

www.rletech.com 21 970.484.6510
2 Connections and Settings
2.1.6 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)
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 K1Fault and K2Leak, are located above TB4 and TB5 in the LED status
strip near the center of the main board. They indicate the status of the relays On/Off. The leak
detection relay is activated when a leak is detected. The cable break relay is activated when a
cable fault is detected.
These relays are set to factory defaulted to Unsupervised; see 5.8.7, “Supervised Relays” on
page 37, for Supervised Relays function.
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.
2.1.7 RS232 Connector
The RS232 port uses only the transmit, receive, and ground pins (2, 3 and 5). The baud rate is
9600. The RS232 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 LD5100.
2.1.8 TB6: 4-20mA Output
A 4-20mA loop powered output is provided on TB6. The maximum range (20 mA) can be set
to 1000, 2500, or 5000 feet. Connect the 4-20mA wires to TB6 as follows:
TB6-1 4-20mA positive (+)
TB6-2 4-20mA negative (-)