85
CASCADE CONNECTION
4
CASCADE CONNECTION
The models STEEL PRO POWER 270-2 P , STEEL PRO POWER 405-3 P and STEEL PRO POWER 540-4 P can be connected together to create
modular and modulating cascade systems with a maximum number of thermal elements equal to 10, for a maximum installed
power of 1310 kW. In this way, from the interface on one of the thermal modules (chosen as the "MANAGING" module of the system),
it is possible to manage the entire cascade.
Thermal module 1
M D
1
D
2
D
3
M D
1
M D
1
D
2
D
3
Thermal module 2
Thermal module 3
The thermal modules are standard set with a MANAGING element (M) and a DEPENDING (D) element.
To be able to connect the modules in cascade it is necessary to carry out the operations described in the following paragraph.
4.1
Preliminary operations
Before proceeding to connect the cascade bus, the following preliminary operations must be carried out:
− Assignment of the correct I/O on the "MANAGING" board (D4 and D8) of each "DEPENDING" thermal module;
− Setting of the dip-switches on each board of the thermal elements of each "DEPENDING" thermal module (thermal module
2 and 3).
Thermal module
3
D
8
D
9
Thermal module
1
M D
1
D
2
D
3
Thermal module
2
D
4
D
5
D
6
D
7
4.1.1
I/O assignment
9
Perform this operation only on the cascade-connected thermal modules such as "DEPENDING".
This operation is intended to modify the I/O management on the "MANAGING" tab of each of the thermal modules connected as
"DEPENDING".
Modify the par. 97 in this way:
− give power to the only thermal module on which the I/O assignment needs to be carried out;
− enter into "Settings", "Device Configuration", "MANAGING" and assign to par. 97 the value 16 (pump versions) or 17 (valve
versions);
− remove the power supply to the module;
− repeat this operation for all the "DEPENDING" thermal modules of the cascade.
