Maxon ESCON Module 50/8, Справочник по аппаратуре, Страница: 12 / 62

Specifications
Limitations
ESCON Module 50/8 Hardware Reference
2-12
CCMC | 2021-08 | rel10243
2.2.2 Application Example: Determining a suitable Heat Sink
To choose a suitable heat sink you will need to determine the maximum heat resistance R
th
. Retrieve the
values of above figures as follows:
1) Assumption
The ESCON Module 50/8 (532872) shall be operated at a nominal operating vV
CC
of
24 V and an output current I
cont
of 8 A.
2)  Figure 2-1
At the intersection of the red characteristic (24 V) and 8 A output current (X-axis), a power
dissipation of 3.2 W results on the Y-axis.
3)  Figure 2-2
The black characteristic (ESCON Module 50/8) reveals that operation with a power dissipa-
tion of 3.2 W (X-axis) is possible without heat sink up to a maximum ambient temperature of
approx. 55 °C (Y-axis).
Under the same conditions, however, for operation at a maximum ambient temperature of 85
°C (Y-axis) a heat sink with a maximum heat resistance R
th
of less than 4 K/W is required
(yellow characteristic).
Use the maxon accessory «ESCON Module 50/8 Thermal Pad» (586142) for optimum heat transfer and
observe the manufacturer's specifications for the respective heat sink.
Table 2-5 Heat Sink – Specification & Accessories
2.3 Limitations
Table 2-6 Limitations
Specification / Accessories
ESCON Module
50/8 Heat Sink
*3)
Dimensions 53.3 x 37.5 x 16.5 mm (L x B x H)
(586141)
Heat resistance R
th
5.8 K/W
Mounting 4 threads for M2.5 screws
Material Aluminum, black anodized
ESCON Module
50/8 Thermal Pad
*3)
Dimensions 40 x 25 x 4 mm (L x B x H) (586142)
*3) Corresponds to the components used in ESCON Module 50/8 HE (586137)
Protection functionality Switch-off threshold Recovery threshold
Undervoltage 7.2 V 7.4 V
Overvoltage 58 V 55 V
Overcurrent 22.5 A —
Thermal overload 105 °C 90 °C