Omron SmartSlice GRT1 Series

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Digital I/O Units Section 4-6
Note With the GRT1-OD4G-1 or GRT1-OD4G-3, even if a short-circuit occurs on
one output, the other three outputs will operate normally.
Rated Output Current of the GRT1-OD4G-3
The total power that may be delivered by the outputs of the GRT1-OD4G-3
depends on the ambient temperature. To determine the maximum allowed
temperature for an application, add the squares of the currents (at 24 V DC)
for outputs that can be ON simultaneously. Find the corresponding tempera-
ture in the following graph. The actual ambient temperature may not exceed
the found value.
If necessary, spread the output load over multiple GRT1-OD4G-3 Units.
0
2
4
6
8
10
12
14
16
18
0 102030405060
Ambient temperature
Σ
I
2
Ambient
temperature
Examples of maximum output loads
≤30 °C
16 A
2
4 points × 2 A
35 °C
14 A
2
3 points × 2 A + 1 points × 1.4 A
4 points × 1.85 A
40 °C
11.5 A
2
2 points × 2 A + 2 points × 1.3 A
4 points × 1.7 A
45 °C
9 A
2
2 points × 2 A + 2 points × 0.7 A
4 points × 1.5 A
50 °C
6.5 A
2
1 points × 2 A + 1 points × 1.4 A + 2 points × 0.5 A
4 points × 1.25 A
55 °C
4 A
2
1 points × 2 A
4 points × 1 A
Σ
I
2