54
Installation
2582302_C_EN_1611
Nortec EL
Table 10: Modbus Communication Parameters
Parameter
Default
Software Adjustable Range
Signal type
EIA-485
–
Transmission mode
RTU
–
Baud rate
9600
110, 300, 600, 1200, 2400, 4800,
9600, 19200, 38400, 57600, 76800
or 115200
Data bits
8
–
Stop bits
1
–
Parity
Even
Odd, Even, None
Address
10
1-247
Time out
300 s
1-300 s
5.8.4 Connecting Multiple Units Using Linkup
The integrated controller in the Nortec EL steam humidifier allows up to six integrated controllers (for
a maximum of 12 steam cylinders) to be connected in a "main-extension" configuration using Nortec's
Linkup system. All the humidifiers within this setup must share the same location, and all linked units
will be controlled by one set of control signals connected to the main unit.
Refer to
Figure 37
and connect multiple unit using Linkup as follows:
1. Connect all control signals for the entire Linkup configuration to the low voltage terminal strip A in
the main unit.
2. Install a jumper wire between the terminal points "1" and "2" in the low voltage terminal strip on all
extension units.
3. Connect a multi-strand twisted pair shielded cable (18-24 AWG, 120 Z) between the J10 connectors
on the control board of each Nortec EL steam humidifier in the Linkup system.
IMPORTANT!
Do not reverse polarity.
4. Install the termination jumper JP8 in the control board of the last extension unit in the Linkup system.
5. Finally, refer to the Operation and Maintenance Manual to set up the multi-unit configuration in the
control software.