INSTALLATION INSTRUCTIONS
Hydrosense Conventional Water Detection System
Document Part No. 3500012 REV03
Page | 10 of 27
Figure 3
RS 485 Bus
Bus connected devices are connected via a 2 core cable to the terminals marked RS485 +
and – on the main control panel PCB. Up to 14 devices may be connected and each device
has terminals for the incoming cables and outgoing cables. All except the last device
connected to the cable must have the jumper links J2 removed.
Set the devices address using the DIP switch, ensure no two devices share the same
address.
NOTE:
Each RS 485 device will need power applied as well as the RS 485 for the device to
operate.
Figure 4
RS 485 Repeater Panels
Connect the RS485 bus and power to each repeater panel. Up to 7 repeater panels may be
connected and each board has terminals for the incoming cables and outgoing cables. All
except the last RS485 device must have the jumper links J2 removed. Turn on the Enable
Control key-switch and set the Write Enable switch to on then briefly press the
PROCESSOR RESET button on the control panel. Wait for a few seconds and the main
panel will show the addresses of the repeaters that were found on the display for instance r1
indicates that a repeater at address 1 has been found.
Turn the write enable switch of, then on again and then press the ENTER button to accept
each repeater that has been found. When all repeaters have been added, set the control
panel Write Enable switch to off.
Press the Watchdog reset switch on the main panel.
