7 Start-Up
System Manual Modular Systems
Page 48 of 114
HI 800 191 E Rev. 2.02
7
Start-Up
Commissioning of modular HIMatrix system comprises the following phases:
Mounting the subrack in a suitable location and its assembly with modules.
Take the dissipation of the generated heat into account.
Electrical connection of power supply, earthing, sensors, and actuators
Configuration
-
Writing the user program
-
Definition of safety, communication and other parameters
7.1
Considerations about Heat
The increased integration level of electronic components causes a corresponding lost heat. This
depends on the external load of HIMatrix modules. Depending on the structure, the system
installation and ventilation are thus of importance.
During the system installation, it must be ensured that the approved environmental
requirements have been adhered to. Lowering the operating temperature increases the lifetime
and the reliability of the electronic components within the systems.
7.1.1
Heat Dissipation
A closed enclosure must be designed such that the heat generated inside can be dissipated
through its surface.
Mounting type and position must be chosen such that heat dissipation is ensured.
The power dissipation of the installed equipment is decisive for determining the fan
components. It is assumed that heat load and unhindered natural convection are uniformly
distributed (see Chapter 7.1.1.3).
7.1.1.1
Definitions
P
V
[W]
Power dissipation (heat capacity) of the electronic components within the
enclosure
A [m
2
]
Effective enclosure surface area (see Table 24)
k [W/m
2
K]
Heat transfer coefficient of the enclosure, steel sheet: ~ 5.5 W/m
2
K
7.1.1.2
Installation Type
In accordance with the mounting or installation type, the effective enclosure surface area A is
determined as follows:
Enclosure installation type in accordance with VDE
0660, Part 5
Calculation of A [m
2
]
Individual enclosure, free-standing on
all sides
A = 1.8 x H x (W + D) + 1.4 x W x D
Individual enclosure for wall mounting
A = 1.4 x W x (H + D) + 1.8 x H x D
First or last enclosure in a suite, free-
standing
A = 1.4 x D x (W + H) + 1.8 x W x H
First or last enclosure in a suite, for wall
mounting
A = 1.4 x H x (W + D) + 1.4 x W x D
Central enclosure, free-standing
A = 1.8 x W x H + 1.4 x W x D + H x D
Central enclosure for wall mounting
A = 1.4 x W x (H + D) + H x D
Enclosure within a suite, for wall
mounting, covered roof surface
A = 1.4 x W + H + 0.7 x W x D + H + D
Table 24: Installation Type
