42
Planning
2596995_0_EN_1905
Nortec RS
CAT-5 or better cable with RJ-45 terminations is recommended for BTL-certified BACnet IP com-
munications.
18-24 AWG shielded, twisted pair cable with 120 Ω impedance is recommended for LonWorks and
BTL-certified BACnet MS/TP.
To use the BTL-certified BACnet or LonWorks protocols, jumper J7 on the integrated control board
must be Off. When the jumper J7 is On, the native Modbus protocol is enabled.
4.4.2 Linkup
The Linkup function allows linking of up to six integrated control boards (for a maximum of 12 steam
cylinders) in a "Main-Extension" configuration through the connector J10 on the integrated control board.
One set of control signals (analog or digital) is connected to the unit designated as the "Main" unit.
The Nortec RS humidifiers can then be configured to operate in parallel or in series mode to satisfy
humidity demand, as described in
"General Description" on page 1
. Humidifiers operated in series mode
permit a lower turn-down ration, however since the Nortec RS has 100% turn-down, it's typically recom-
mended to use parallel mode. In parallel mode, all steam output from the units in the chain connect to
a common steam distribution system, which offers even wear on the units.
LV
8
7
6
5
4
3
2
9
1
All inputs
LV
8
7
6
5
4
3
2
9
1
4
1
2
3
CONTROL BOARD
ACCESSORY BOAR
D
REMOTE BOAR
D
BMS
LinkUp
SAB
3V
CR2032
BAT
SD
J7
J4
J8
J11
GN
D+
–
GN
D+
–
GN
D+
–
24V
GND
J10
J10
J12
J14
J6
CONTROL BOARD
ACCESSORY BOAR
D
REMOTE BOAR
D
BMS
LinkUp
SAB
3V
CR2032
BAT
SD
J7
J4
J8
J11
GN
D+
–
GN
D+
–
GN
D+
–
24V
GND
J10
J10
J12
J14
J6
CONTROL BOARD
ACCESSORY BOAR
D
REMOTE BOAR
D
BMS
LinkUp
SAB
3V
CR2032
BAT
SD
J7
J4
J8
J11
GN
D+
–
GN
D+
–
GN
D+
–
24V
GND
J10
J10
J12
J14
J6
LV
8
7
6
5
4
3
2
9
1
4
Figure 23: Linkup Wiring
1 Main unit (all control signals to unit)
2 Extension unit #1 (no control signals to unit)
3 Extension unit #X (no control signals to unit)
4 Jumper (on all Extension units)