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Page 5
2008-02-15
(4) Configuring the Humidifiers
(a) Since Nortec LINKS 2 can connect to a maximum of 8 units, it will be
necessary to set the unit address for each humidifier. The lead unit can be
determined by the presence of the LINKS module and should be set to
modbus address 1. The slave humidifiers can be given a unit address
according to the number the unit will have on the networked chain.
(b) In order to change the current modbus address, press the up and down
arrows on the keypad at the same time. When prompted, enter the code
8808. Note: Each column of the password may be adjusted with the up or
down arrow keys. Once that number is set, pressing the enter key will move
the cursor to the next column.
(c) Once the password is set, select the modbus address heading and press
enter. Use the up and down arrows to change the address setting.
(d) Determine the desired humidifier ordering on the network. To change the
network instance follow step 3 and enter the parameter value of 2 for unit 2, 3
for unit 3 and so on.
(e) Place the appropriate Unit Identifier label on each humidifier. These labels
should be placed below the user terminal strip located in the electrical cabinet
section of the humidifier.
(f) Connect the slave humidifiers (if applicable) to the Nortec LINKS 2 Module. A
twisted pair cable should be used so that the Net + terminal on the LINKS
module connects to the Net+ terminal of the NHDI/SC slave option. The Net –
terminal on the LINKS 2 module should also be connected to the Net-
terminal of the slave option. Refer to the unit’s wiring diagram for more
information.