IB IL 24/230 DOR 4/W-PC (-PAC)
16
6530B
Maximum Switching Current Depending on the Temperature (With Alternating Voltage)
Load Current (I
L
in A) as a Function of the Ambient Temperature (T
A
in °C)
Power Dissipation
Formula to Calculate the Power Dissipation in the Terminal
P
EL
= P
BUS
+ (P
REL
) + P
L
P
EL
= 0.17 W + 4 x ((0.31 W) + I
L
2
x 0.04
Ω)
Where
P
EL
Total power dissipation in the terminal
P
BUS
Power dissipation through bus operation
P
REL
Power dissipation of the relay coil
P
L
Power dissipation through the load current via the contacts
I
L
Load current of the output
Power Dissipation of the Housing Depending on the Ambient Temperature
P
HOU
= 2.7 W
-25°C (-13°F) < T
A
≤
+25°C (+77°F)
P
HOU
= 2.7 W - ((T
A
- 25°C [77°F]) x 0.02 W/°C)
+25°C (+77°F) < T
A
≤
+55°C (+131°F)
Where
P
HOU
Permissible power dissipation of the housing
T
A
Ambient temperature
With a switching current of 3 A, the switching voltage with alternating current must not exceed
253 V AC. Observe the derating.
0
0 . 5
1
1 . 5
2
2 . 5
3
1 0
2 0
3 0
4 0
5 0
5 5
6 3 2 6 A 0 0 8
I
L
A
T
A
4 5
° C
For N/C contacts, the term P
REL
is omitted from the formula.
