1-2 LDRA6 Front Panel Indicators .......................................................................................................................2
1-2.1 Zone LEDs ...........................................................................................................................................2
1-2.2 Power LED...........................................................................................................................................2
2-1.1 TB1 – Power ........................................................................................................................................5
2-4 SW4 through Sw9 ...........................................................................................................................................8
3-1 Before You Begin ...........................................................................................................................................9
3-2 Connecting the Water Leak Detection Cable ..................................................................................................9
3-2.1 Secure the Cable to the Floor ...............................................................................................................9
3-3 Apply Power to the Unit ...............................................................................................................................11
3-3.1 Power via Wall Adapter .....................................................................................................................11
3-3.2 Power via Direct Line.........................................................................................................................11
4-2 Displaying the Help Menu ............................................................................................................................12
4-3 Function Commands .....................................................................................................................................13
4-3.1 c – Contact Closure Settings ..............................................................................................................13
4-3.8 mr – Reset Modbus Port and Statistics...............................................................................................14
4-3.9 m – View Modbus Port Settings and Statistics...................................................................................14
4-3.10 t – Toggle Modbus Trace On/Off.......................................................................................................15
4-3.11 z – Display Leak Zone Readings........................................................................................................15
4-3.12 sr – summary relay mode ...................................................................................................................15
4-3.13 zr – zone relay mode ..........................................................................................................................15
4-3.14 x – Exit to Bootloader ........................................................................................................................15
On solid and green for normal cable conditions.
Flashes quickly and turns red if a leak is detected in the zone.
Flashes quickly and turns yellow if a cable fault is detected in the zone.
On solid once an alarm is silenced.
Default Dry Contact Setting:
On solid and green for normal, non-alarm conditions.
Flashes quickly and turns red (by default) if an alarm condition is detected in the zone.
On solid once an alarm is silenced.
1-2.2 Power LED
On (green) as long as power is on.
1-2.3 Audible Alarm
Activates when an alarm condition is detected. Silenced with the Quiet/Test/Reset switch.
1-2.4 Quiet/Test/Reset Switch
During alarm, the audible alarm is silenced, and any LED(s) in alarm will glow solidly. If the alarm goes
away, the LED(s) will flash slowly. Hold down the Quiet/Test/Reset switch to reset all alarms and
complete and self test cycle. If any alarms still exist, the unit will not reset the corresponding zones.
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User Guide: LDRA6 Chapter 1: Product Overview
Power LED
Test / Reset/ Silence Switch
Leak /Cable Detected LEDs
Figure 1-1: LDRA6 Front Panel Indicators
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Chapter 2: Product Overview User Guide: LDRA6
CHAPTER 2: CONNECTIONS & SETTINGS
2-1 LDRA6 BOARD
The LDRA6’s zone connectors, labeled TB2, are found at the bottom of the board on the double-stacked
terminal block. The switches on the board are labeled SW1 and SW2. The unit has one dial, labeled R1,
which is used to manually adjust the sensitivity for all zones. Sensitivity for individual zones may be
configured through the LDRA6’s RS232 Craft Port configuration, labeled P2. The switches for
configuring Dry Contact or Leak Detection monitoring for zones are labeled SW4 through SW9.
P2
RS232
R1
Leak Sensitivit
SW4 – SW9
y
Zone
Configuration
TB7
RS485
TB6
Summary
Relay
TB5
Zone
Alarm
Relays
TB4
Zone
Alarm
Relays
Zone
Figure 2-1: LDRA6 Board
TB3
TB2
Zone
POW1
Power
TB1
Power
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User Guide: LDRA6 Chapter 2: Connections & Settings
2-1.1 TB1 – Power
The LDRA6 connects to a 24VDC power supply using TB1, a two position connector labeled 24VDC.
2-1.2 POW1 – Power
Power can also be supplied to the unit through POW1. This is a wall adapter plug connection. This also
requires 24VDC.
2-1.3 TB2, TB3 – Zone Inputs
SeaHawk Leak Detection Cable (SC) and/or dry contact wires connect to the LDRA6 through TB2. Fifteen
foot (4.57m) leader cables (one is included in each leader cable kit, part #LC-KIT) are required for leak
detection cable connections only. Dry contact wires must be user supplied or may be supplied with your
dry contact device. Connect cables/wires as follows:
Position Leak Detection Cable Dry Contact Wire
TB3-1 Zone 1 White Zone 1 Input-1
TB3-2 Zone 1 Black Zone 1 Input-2
TB3-3 Zone 1 Green N/A
TB3-4 Zone 1 Red N/A
TB3-5 Zone 2 White Zone 2 Input-1
TB3-6 Zone 2 Black Zone 2 Input-2
TB3-7 Zone 2 Green N/A
TB3-8 Zone 2 Red N/A
TB3-9 Zone 3 White Zone 3 Input-1
TB3-10 Zone 3 Black Zone 3 Input-2
TB3-11 Zone 3 Green N/A
TB3-12 Zone 3 Red N/A
TB2-1 Zone 4 White Zone 4 Input-1
TB2-2 Zone 4 Black Zone 4 Input-2
TB2-3 Zone 4 Green N/A
TB2-4 Zone 4 Red N/A
TB2-5 Zone 5 White Zone 5 Input-1
TB2-6 Zone 5 Black Zone 5 Input-2
TB2-7 Zone 5 Green N/A
TB2-8 Zone 5 Red N/A
TB2-9 Zone 6 White Zone 6 Input-1
TB2-10 Zone 6 Black Zone 6 Input-2
TB2-11 Zone 6 Green N/A
TB2-12 Zone 6 Red N/A
2-1.4 TB5, TB4 – Zone Alarm Relays
These are the Zone Alarm Relay output terminal blocks (Form C). A status LED is located above each
relay, which will indicate the state of the relay (on/off). These relays can be configured as supervised or
unsupervised, latched or unlatched (unsupervised and unlatched by factory default). Connect the Zone
Alarm Relay wires to TB3 and TB4 as follows:
TB5-1 Zone 1 alarm relay normally open (NO)
TB5-2 Zone 1 alarm relay common (C)
TB5-3 Zone 1 alarm relay normally closed (NC)
TB5-4 Zone 2 alarm relay normally open (NO)
TB5-5 Zone 2 alarm relay common (C)
TB5-6 Zone 2 alarm relay normally closed (NC)
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Chapter 2: Product Overview User Guide: LDRA6
TB5-7 Zone 3 alarm relay normally open (NO)
TB5-8 Zone 3 alarm relay common (C)
TB5-9 Zone 3 alarm relay normally closed (NC)
TB4-1 Zone 4 alarm relay normally open (NO)
TB4-2 Zone 4 alarm relay common (C)
TB4-3 Zone 4 alarm relay normally closed (NC)
TB4-4 Zone 5 alarm relay normally open (NO)
TB4-5 Zone 5 alarm relay common (C)
TB4-6 Zone 5 alarm relay normally closed (NC)
TB4-7 Zone 6 alarm relay normally open (NO)
TB4-8 Zone 6 alarm relay common (C)
TB4-9 Zone 6 alarm relay normally closed (NC)
2-1.5 TB6 - Summary Relay
This is the Summary Relay output terminal block (Form C). A status LED is located to the right of the
relay, which will indicate the state of the relay (on/off). This relay can be configured as supervised or
unsupervised, latched or unlatched. Connect the Summary Relay wires to TB5 as follows:
TB6-1 Summary alarm normally open (NO)
TB6-2 Summary alarm common (C)
TB6-3 Summary alarm normally closed (NC)
2-1.6 TB7 – RS485 Connection
The LDRA6 can communicate with other devices through the RS485 terminal block. Wire as follows:
TB7-1 + or A wire
TB7-2 – or B wire
TB7-3 Shield or GND wire
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User Guide: LDRA6 Chapter 2: Connections & Settings
2-2 SW1 - RELAYS AND ALARM
2-2.1 SW1, Position 1: Summary Relay Supervised / Unsupervised
Configures the Summary Alarm relay as supervised or unsupervised. If a relay is supervised, the relay
picks until power goes off or until an alarm is detected. The alarm then releases to announce a change in
state. An unsupervised relay picks only when an alarm is detected.
1 = Supervised
0 = Unsupervised (factory default)
2-2.2 SW1, Position 2: Relays Latched / Unlatched
Configures all relays as latched or unlatched. If a relay is latched, the relay will remain in an alarm
condition until the Reset switch is pressed. If a relay is unlatched, the relay will remain in alarm until
either the Reset switch is pressed, or the condition that tripped the relay goes away.
1 = Latched
0 = Unlatched (factory default)
2-2.3 SW1, Position 3: Zone Relay Linkage
Configures all Zone Alarm Relays to link together and pick simultaneously upon alarm. When this switch
is turned on, if a zone goes into alarm, all six zone alarm relays and the summary alarm relay will pick.
When this switch is turned off, if a zone goes into alarm, only the zone alarm relay for the zone that is in
alarm and the summary alarm relay will pick.
1 = Individual Zone Alarm Relays Linked
0 = Individual Zone Alarm Relays Not Linked (factory default)
2-2.4 SW1, Position 4: Zone Relays Supervised / Unsupervised
Configures the individual Zone Alarm Relays as supervised or unsupervised. If a relay is supervised, the
relay picks until power goes off or until an alarm is detected. The alarm then releases to announce a change
in state. An unsupervised relay picks only when an alarm is detected.
1 = Supervised
0 = Unsupervised (factory default)
2-2.5 SW1, Positions 5: Leak Alarm Delay
Designates the unit’s leak delay time. Setting this switch to off uses the default leak alarm delay of 15
seconds. Setting this switch to on designate the leak alarm delay to use the value specified through the
unit’s craft port.
1 = Leak Alarm Delay set through Craft Port
0 = Leak Alarm Delay set at 15 seconds (factory default)
Configures the Summary Alarm Relay as silence-able or not silence-able. If the Summary Alarm Relay is
silence-able, the relay returns to normal when the Quiet/Test/Reset button is pressed. If the Summary
Alarm Relay is not silence-able, the relay stays picked until the alarm condition is cleared.
1 = Summary Alarm Relay is Silence-Able
0 = Summary Alarm Relay is Not Silence-Able (factory default)
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Chapter 2: Product Overview User Guide: LDRA6
2-2.7 SW1, Positions 7 and 8: Re-alarm Time
Configures the unit’s re-alarm time. Set the switches as below for desired (approximate) re-alarm times:
Configures the unit’s RS485 address. The unit’s address is set in bits and can range from 00000001 to
11111110 (1-254 in decimal notation).
00000000 = No Address (factory default)
00000001 = 1
00000010 = 2
00000011 = 3
…
11111101 = 253
11111110 = 254
2-4 SW4 THROUGH SW9
Configures each zone as a Leak Detection Cable input or a Dry Contact input. If configured as a Leak
Detection Cable input, the zone requires a 4-wire leak detection cable (SC) to monitor. If configured as a
Dry Contact input, the zone requires a 2-wire dry contact device to monitor. If any zone is not desired to be
used, set the zone to Dry Contact and normally open (factory default) to avoid unwanted alarms.
SW4 Up = Zone 1 is a Dry Contact input
SW4 Down = Zone 1 is a Leak Detection input
SW5 Up = Zone 2 is a Dry Contact input
SW5 Down = Zone 2 is a Leak Detection input
SW6 Up = Zone 3 is a Dry Contact input
SW6 Down = Zone 3 is a Leak Detection input
SW7 Up = Zone 4 is a Dry Contact input
SW7 Down = Zone 4 is a Leak Detection input
SW8 Up = Zone 5 is a Dry Contact input
SW8 Down = Zone 5 is a Leak Detection input
SW9 Up = Zone 6 is a Dry Contact input
SW9 Down = Zone 6 is a Leak Detection input
2-5 R1 – LEAK DETECTION CABLE SENSITIVITY SETTING
This potentiometer allows users to manually adjust the sensitivity setting for all six zones. Turn the dial
clockwise to make the zone less sensitive. This means a leak will be reported in that zone when a large
amount of water is present. Turn the dial counterclockwise to make the zone more sensitive. This means a
leak will be reported for the zone when a small amount of water is present.
This potentiometer can be overridden through the LDRA6’s craft port configuration for individual zones
(see section 4-3.3 for details).
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User Guide: LDRA6 Chapter 3: Installation
CHAPTER 3: INSTALLATION
3-1 BEFORE YOU BEGIN
The LDRA6 is a wall mounted device. To secure the device to the wall, first open the door of the
enclosure. There are knockouts on the top and bottom of the enclosure. Remove as many as necessary.
Use drywall anchors and the holes in the back of the enclosure to secure the unit to the wall.
3-2 CONNECTING THE WATER LEAK DETECTION CABLE
A leader cable kit (part #LC-KIT) is required per zone to connect the LDRA6 to SeaHawk Leak Detection
Cable (SC). A leader cable is included in each LC-KIT; one end of this leader cable connects into the
LDRA6. This end of the cable is finished with stripped, bare wires. The other end features a mating
connector which connects with the SC cable. The end of the cable zone requires a removable end
terminator (EOL) which is also included in a leader cable kit (LC-KIT).
NOTE
A Leader Cable Kit (part #LC-KIT) is required per zone to connect the LDRA6 to
SeaHawk Leak Detection Cable (SC). Each LC-KIT includes a 15 foot (4.57m) leader
cable and an EOL terminator. The kits are NOT included with the LDRA6, and can
be purchased separately.
To connect the leader cable to the LDRA6, connect the wires (4) to the appropriate zone position of the
terminal block connectors (see section 2-1.3for more wiring details). Adjust the appropriate zone
configuration for Leak Detection input (see section 2-4 for more details).
Once the leader cable is plugged into the terminal block, it is ready to be connected to the SC cable. To do
this, unscrew the EOL terminator from the end of the leader cable. Attach the first length of SC cable to
the leader cable. Route the SC cable according to the cable layout diagram, if provided. Lay the cable
according to figure 3-1 and section 3-2.1. Secure the EOL terminator on the unoccupied end of the SC
cable.
:
Figure 3-1: Water Leak Detection Cable
3-2.1 Secure the Cable to the Floor
Secure the cable to the floor with either J-clips (part #JC) or one of the other approved methods shown in
Figure 3-2. J-clips are the manufacturer’s recommended installation method.
Place one J-clip every three feet along the length of the SC cable. Place one J-clip at each turn of
the cable.
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Chapter 3: Product Overview User Guide: LDRA6
If the cable is installed over an obstruction, clip the cable on both sides, as close to the obstruction
as possible.
Do not install the cable directly in front of an air conditioner. Allow a minimum of 6 feet (1.83m)
between the unit and the cable. If the SC cable is too close to the air conditioning unit’s air stream,
the moisture from the humidifier may cause false leak readings. If the cable must be installed in
front of an air conditioning unit, place the J-clips 12 to 18 inches (.305m to .457m)apart.
NOTE
It is important to finish the end of the SeaHawk Leak Detection Cable (SC) with the
end-of-line terminator (EOL). If the EOL terminator is not present, a cable fault will
register. Note any variances between the cable layout diagram and the actual cable
installation. Wait approximately one minute. No alarm should be present.
:
3-2.2 Recommended Cable Installation
Figure 3-2: Cable Installation Methods
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User Guide: LDRA6 Chapter 3: Installation
3-3 APPLY POWER TO THE UNIT
Once cable for all the desired leak detection zones has been connected to the unit, power may be applied.
The LDRA6 operates on 24VDC power supplied by a wall adapter or a direct line. A power supply should
be run to the location of the unit.
3-3.1 Power via Wall Adapter
The LDRA6 can be powered by a wall adapter. Before connecting the wall adapter to the LDRA6, unplug
the adapter from the wall. If the adapter has a connector on the end, feed the cord through one of the
knockouts in the enclosure and plug it directly into the 24VDC receptacle located at POW1. Plug the other
end of the adapter into the wall. The LDRA6 should power up immediately.
3-3.2 Power via Direct Line
If the adapter does not have a connector on the end, strip the end of the adapter line so the two wires inside
are exposed. Strip the end of each of the two wires and feed them into the enclosure. Insert the two wires
into the terminal block labeled TB1. The minus, or ground, wire is placed into the right opening in the
terminal block. The plus, or live, wire is placed into the left opening in the terminal block.
Once all the wires have been placed inside the terminal block, tighten the three screws across the bottom of
the terminal block until the wires are securely held in place. Plug the other end of the wall adapter into the
wall. The LDRA6 should power up immediately.
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Chapter 4: Product Overview User Guide: LDRA6
CHAPTER 4: START-UP
4-1 BOOT-UP
Make sure the RS-232 port is connected to a PC or terminal with a straight through cable. When the
LDRA6 is powered up, the boot ROM and flash program code are verified. Output similar to the screen
displayed below should appear on the terminal or terminal emulation software.
Once the system reaches this point, type? and press Enter to display the Help Menu. The Help Menu lists
the function commands for the LDRA6.
Help Menu – LDZ6/RASP6 V2.1
c - view/change CC settings
ld - view/change leak delay
sens – view/change leak zone sensitivity
e - view eeprom data
er - erase eeprom data – restores factory defaults
mbb - change modbus baud rate
mbp - change modbus parity
mr - reset modbus port/statistics
m - view modbus port settings/statistics
t - toggle modbus trace on/off
z - display leak zone readings
sr - summary relay mode
zr - zone relay mode
x - exit to bootloader
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User Guide: LDRA6 Chapter 4: Start-Up
4-3 FUNCTION COMMANDS
4-3.1 c – Contact Closure Settings
c displays the current contact closure settings for each zone. To adjust a zone’s configuration, use the
following format: cX/type/offcolor/oncolor/delay
X is the zone number and can range from 1-6 for each input.
type is the contact closure setting; use “no” for normally open, “nc” for normally closed, or “st”
for a status point.
off-color is the normal condition (non-alarm) LED color.
on color is the alarm condition LED color.
The colors for LEDs can be green, yellow or red.
delay is the number of seconds the alarm must be active before annunciated and can range from 0
to 999 seconds.
** 1: CC / 2: CC / 3: CC / 4: CC / 5: CC / 6: CC **
cX/type/offcolor/oncolor/delay
c1/no/green/red/0
c2/no/green/red/0
c3/no/green/red/0
c4/no/green/red/0
c5/no/green/red/0
c6/no/green/red/0
4-3.2 ld – Leak Delay Setting
ld displays the current leak alarm delay in seconds. This is the number of seconds the leak alarm must be
detected before annunciated. The leak alarm delay can range from 0 to 999 seconds.
Use the format ld/x where x is the number of seconds for the leak alarm delay.
This value applies to all zones configured for Leak Detection. SW1 position 5 determines if this RS232
configured value is used (see section 2-2.5).
4-3.3 sens – Leak Zone Sensitivity
sens displays the current leak detection sensitivity settings for each zone. The first value displayed is the
value read from R1, the sensitivity dial on the LDRA6 board. Each zone is displayed in the format x:
yyy/zzz, where x is the zone, yyy is the value currently being used for sensitivity (in micro amps read by
the sensing cable, yyy can range from 25 to 300), and zzz is the manually entered value through the craft
port (factory default is 0). Values shown below uses sensitivity set to High (fully counterclockwise).
Pot: 25 1:25/0 2:25/0 3:25/0 4:25/0 5:25/0 6:25/0
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Chapter 4: Product Overview User Guide: LDRA6
To override the manual sensitivity dial setting, enter a new value for each desired zone. Using a value of 0
will enable desired zone to use manual sensitivity dial setting. Use the format sensX/yyy to override a
zone’s setting. Example: sens1:300 sets Zone 1 to a sensitivity of 300 micro amps. Type sens and press
Enter again to viewing the Leak Zone Sensitivity settings after entering new value displays the following:
x will exit the application code and only the bootloader will be running.
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Appendix A: Modbus Communications User Guide: LDRA6
APPENDIX A: MODBUS COMMUNICATIONS
This document describes the Modbus communications protocol as supported by the LDRA6. It includes
details and information on how to configure the LDRA6 for communications via Modbus network.
A-1 MODBUS IMPLEMENTATION OF THE LDRA6
The LDRA6 is capable of communicating via the half-duplex RS485 serial communication standard. The
LDRA6 is configured to act as a slave device on a common network. The RS485 medium allows for
multiple devices on a multi-drop network. The LDRA6 is a slave only device and will never initiate a
communications sequence.
A-1.1 Modes of Transmission
The Modbus protocol uses ASCII and RTU modes of transmission. The LDRA6 supports only the RTU
mode of transmission, with 8 data bits, even, odd or no parity and one stop bit.
Every Modbus packet consists of four fields:
Slave Address Field
Function Field
Data Field
Error Check Field (Checksum)
A-1.1.1 Slave Address Field
The slave address field is one byte in length and identifies the slave device involved in the transaction.
Valid address range is between 1 and 254. SW2 on the LDRA6 board sets the address. The firmware
program constantly reads dip SW2. Any changes are updated on the fly. Close the SW2 positions that
correspond to the binary number of the address.
A-1.1.2 Function Field
The function field tells the LDRA6 which function to perform. Function codes are designed to invoke a
specific action by the LDRA6.
A-1.1.3 Data Field
The data field varies in length depending on whether the message is a request or a response to a packet.
This field typically contains information required by the LDRA6 to perform the command specified or to
pass back data to the master device.
A-1.1.4 Error Check Field
The error check field consists of a 16-bit (2 byte) Cyclical Redundancy Check (CRC16). It allows the
LDRA6 to detect a packet that has been corrupted with transmission errors.
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User Guide: LDRA6 Appendix A: Modbus Communications
A-2 PACKET COMMUNICATIONS FOR THE LDRA6
A-2.1 Read Output Registers
To read the LDRA6 parameter values, the master must send a Read Output Registers request packet. The
Read Output Registers request packet specifies a start register and the number of registers to read. The start
register is numbered from zero (40001 = zero, 40002 = one, etc).
40001 Leak Threshold Zone 1 Trip current for leak alarm uAmps 0-65535
40002 Leak Threshold Zone 2 Trip current for leak alarm uAmps 0-65535
40003 Leak Threshold Zone 3 Trip current for leak alarm uAmps 0-65535
40004 Leak Threshold Zone 4 Trip current for leak alarm uAmps 0-65535
40005 Leak Threshold Zone 5 Trip current for leak alarm uAmps 0-65535
40006 Leak Threshold Zone 6 Trip current for leak alarm uAmps 0-65535
40007 Reserved
40008 Reserved
40009 Reserved
40010 Silence Alarm Set to 1 to silence audible alarm 1 = Silence 0-65535
40011 Reset Alarm Set to 1 to reset alarms 1 = Reset Alarm 0-65535
40012 Reserved
40013 Reserved
40014 Reserved
40015 Reserved
40016 Reserved
40017 Reserved
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Appendix A: Modbus Communications User Guide: LDRA6
A-2.2 Read Input Registers
To read the LDRA6 input values, the master must send a Read Input Registers request packet. The Read
Input Registers request packet specifies a start register and the number of registers to read. The start
register is numbered from zero (30001 = zero, 30002 = one, etc).
30001 Status Bit Level Status (see Table 5) None 0-65535
30002 Leak Current Zone 1 Leakage current on cable uAmps 0-65535
30003 Leak Current Zone 2 Leakage current on cable uAmps 0-65535
30004 Leak Current Zone 3 Leakage current on cable uAmps 0-65535
30005 Leak Current Zone 4 Leakage current on cable uAmps 0-65535
30006 Leak Current Zone 5 Leakage current on cable uAmps 0-65535
30007 Leak Current Zone 6 Leakage current on cable uAmps 0-65535
30008 Input Selection Bit Level Status (see Table 6) None 0-65535
30009 Reserved
30010 Version Firmware version xx.xx X 100 0-65535
Table 5: Status Flags (Register 30001)
Bit Read Registers Response Packet
00 1 = Zone 1: Leak is Detected / Contact Closure Alarm
01 1 = Zone 2: Leak is Detected / Contact Closure Alarm
02 1 = Zone 3: Leak is Detected / Contact Closure Alarm
03 1 = Zone 4: Leak is Detected / Contact Closure Alarm
04 1 = Zone 5: Leak is Detected / Contact Closure Alarm
05 1 = Zone 6: Leak is Detected / Contact Closure Alarm
06 0
07 0
08 1 = Zone 1 Cable Break Alarm
09 1 = Zone 2 Cable Break Alarm
10 1 = Zone 3 Cable Break Alarm
11 1 = Zone 4 Cable Break Alarm
12 1 = Zone 5 Cable Break Alarm
13 1 = Zone 6 Cable Break Alarm
14 0
15 0
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User Guide: LDRA6 Appendix A: Modbus Communications
Table 6: Status Flags (Register 30008)
Bit Read Registers Response Packet
00 0 = Zone 1 Configured for Leak Detection / 1 = Zone 1 Configured for Dry Contact
01 0 = Zone 2 Configured for Leak Detection / 1 = Zone 2 Configured for Dry Contact
02 0 = Zone 3 Configured for Leak Detection / 1 = Zone 3 Configured for Dry Contact
03 0 = Zone 4 Configured for Leak Detection / 1 = Zone 4 Configured for Dry Contact
04 0 = Zone 5 Configured for Leak Detection / 1 = Zone 5 Configured for Dry Contact
05 0 = Zone 6 Configured for Leak Detection / 1 = Zone 6 Configured for Dry Contact
06-15 0
A-2.3 Present Single Register
To set a LDRA6 parameter value, the master must send a Preset Single Register request packet. The Preset
Single Register request packet specifies a register and the data to write to that register. The register is
numbered from zero (40001 = zero, 40002 = one, etc).
For address’s 64-127, set SW1-7 to on, then subtract 64 from the address and use the table.
For address’s 128-191, set SW1-7 to off, #8 to on, then subtract 128 from the address and use the table.
For address’s 192-254, set SW1-7 & 8 to on, then subtract 192 from the address and use the table.
A-3 RTU FRAMING
The example below shows a typical Query/Response from a LDRA6 module.
Table 10: Query Sample
Slave
Address
02 03 00 32 00 03 E5 FA
Slave
Address
02 03 06 01 58 00 FA 00 54 1B 0D
Slave address 2 responds to Function Code 3 with 6 bytes of hexadecimal data and ends with CRC16
User Guide: LDRA6 Appendix A: Modbus Communications
A-4 MODBUS MIRRORING
A-4.1 To use the EIA-485 Modbus mirroring feature set the address on the master LDRA6 to address 255
and then set the address on the slave LDRA6 to 1. The Master unit will then repeat (mirror) any zone
alarms that come into the Slave Unit. When using this feature none of the local Alarm/Zone inputs will
work on the Master unit, The Master unit is only a repeater for the single slave unit being used.
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Appendix B: Troubleshooting User Guide: LDRA6
APPENDIX B: TROUBLESHOOTING
Trouble Action
No Power
Power On LED is Not On
Cable Fault on Zone(s)
Check Power Supply
Check for supply power at TB1 pins 1 and 2 on the bottom right hand corner of
PCB.
1) If power is not present at TB1 pins 1 and 2, check DC input voltage to
wall adapter, if used.
2) If power is not present at TB1 pins 1 and 2, check DC voltage at DC
supply source distribution panel.
3) If voltage (power) is present at TB1, please contact RLE Technologies.
Check for Proper Wiring to Zone Terminal Block
Wiring order should be as follows from left to right for each leak detection zone:
White, Black, Green and Red.
1) If wiring order is correct, disconnect the End-of-Line terminator (EOL)
from the end of the orange SC cable. Then connect the EOL terminator
to the end of the leader cable (non-sensing). Hold down
Quiet/Test/Reset for two seconds to reset control head.
Leak Detected on Zone(s)
2) If the cable fault condition goes away, there is a faulty or damaged
section of orange SC cable.
3) If the fault condition does not clear, remove the respective zone
terminal block and remove the input wires from the leader cable.
Install a jumper wire between pins 1 and 2, and another jumper wire
between pins 3 and 4.
4) If condition still exists, please contact RLE Technologies for extra
support. If the condition clears, the leader cable or EOL terminator is
faulty (open wire(s)).
Be sure there is No Water Present on or around the Zone in Alarm
1) If water is present, dry affected area and reset the controller. If the
condition does not clear follow the step below.
2) Remove the End-of-Line terminator (EOL) from the end of the orange
SC cable and install it onto the end of the leader cable. If the condition
clears, there is a water leak or damage to the sense cable. Start moving
the EOL terminator to the end of each cable section until the waterdetected fault reoccurs. If the condition is still present once the EOL
terminator has been placed on the end of the leader cable, follow the
step below.
3) Disconnect the proper terminal block from the zone in alarm. Place a
jumper wire between pins 1 and 2, and place a jumper wire between
pins 3 and 4. Plug the terminal block back into the proper socket and
push reset on the control head. If the condition is corrected, there is a
problem with the leader cable. If the water leak condition is still
present, contact RLE Technologies for support.
www.rletech.com 970 484-6510 22
User Guide: LDRA6 Appendix C: Technical Specifications
APPENDIX C: TECHNICAL SPECIFICATIONS
Power
Inputs
Water Leak Detection Cable
Cable Input
Maximum Length
Detection Response Time
Outputs
Relays
Communications Ports
RS232
RS485
Protocols
Terminal Emulation (RS232) VT100 compatible
Modbus (RS485) - Optional Slave; RTU Mode; Supports function codes 03, 04, 06 and 16 (Modbus optional)
Alarm Notification
Audible Alarm
Front Panel Interface
Compatible with SeaHawk SC Cable or SeaHawk spot detectors (not included)
Each input requires SeaHawk LC-KIT: 15ft (4.57m) leader cable and EOL (LC-KIT not
included)
1000ft (305m) per zone
20-3600sec, software adjustable in 10sec increments; ±2sec
1 Form C Summary Alarm Relay,
1 Form C Alarm 1 Relay,
1 Form C Alarm 2 Relay.
1 Form C Alarm 3 Relay,
1 Form C Alarm 4 Relay,
1 Form C Alarm 5 Relay,
1 Form C Alarm 6 Relay;
1A @ 24VDC, 0.5A resistive @ 120VAC;
Configurable for supervised or non-supervised, latched or non-latched
9600 baud; Parity none; 8 data bits, 1 stop bit
1200, 2400, 9600 or 19,200 baud; Parity none, odd, even (programmable); 8 data bits, 1
stop bit
Power: 1 green (on/off); Status (1 per zone): 6 tri-color (Power On: green; Alarm: red;
Cable Fault: yellow)
Quiet/Test/Reset: 1
32° to 122°F (0° to 50°C)
5% to 95% RH, non-condensing
15,000ft (4,572m) max.
-4° to 158°F (-20° to 70°C)
10.5”W x 8.0”H x 2.0”D (267mmW x 203mmH x 51mmD)
6 lbs. (2.72kg)
Vertical wall mount
CE; ETL listed: conforms to UL STD 61010-1, EN STD 61010-1; certified to CSA
C22.2 STD NO. 61010-1; RoHS compliant
23 970 484-6510 www.rletech.com
FORT COLLINS CO
970 484-6510
WWW.RLETECH.COM
970 484-6650
FAX
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