The power dissipated within the enclosure generates heat. The enclosure supplier uses power dissipation figures to determine the air flow requirements needed to maintain the allowable heat rise. As the internal heat rise increases, the allowable external ambient temperature decreases.
The power dissipation in an enclosure is dependent on the power requirements of the enclosed equipment, including the:
The power dissipation for each DC-powered discrete and analog device includes the loss of a power supply which is 75% efficient. If the power supply is not included in the enclosure or a supply with a different efficiency is used, adjust the dissipation accordingly.
| Product Type | Power |
|---|---|
|
Controllers (MD Plus and MX) |
14 W |
|
Remote Interface Unit |
6.0 W |
| I/O Subsystem | |
|
AI, 8-Channel, 4-20 mA |
10.1 W |
|
AI, 8-Channel, 4-20 mA, HART |
10.1 W |
|
AI, 8-Channel, 1-5 VDC |
10.1 W |
|
AO, 8-Channel, 4-20 mA |
11.9 W |
|
AO, 8-Channel, 4-20 mA, HART |
11.9 W |
|
AS-Interface |
9.6 W |
|
DeviceNet |
11.4 W |
|
DI, 8-Channel, 24 VDC, Isolated |
3.6 W |
|
DI, 8-Channel, 24 VDC, Dry Contact |
2.9 W |
|
DI, 8-Channel, 120 VAC, Isolated |
3.4 W |
|
DI, 8-Channel, 120 VAC, Dry Contact |
3.4 W |
|
DI, 8-Channel, 230 VAC, Isolated |
3.6 W |
|
DI, 8-Channel, 230 VAC, Dry Contact |
3.6 W |
|
DI, 32-Channel, 24 VDC, Dry Contact |
5.7 W |
|
DO, 8-Channel, 120/230 VAC, Isolated |
6.1 W |
|
DO, 8-Channel, 120/230 VAC, High Side |
6.1 W |
|
DO, 8-Channel, 24 VDC, Isolated |
4.9 W |
|
DO, 8-Channel, 24 VDC, High Side |
3.7 W + load dependent power dissipation (25 W maximum at 24 V)(1) |
|
DO, 32-Channel, 24 VDC, High-Side |
3.0 W + load dependent power dissipation (27 W maximum at 24 V)(2) |
|
Fieldbus H1 card |
10.2 W |
|
Multifunction |
8.2 W |
|
Profibus DP |
10.1 W |
|
RTD, ohms |
2.7 W |
|
Sequence of Events |
3.5 W |
|
Serial Card, 2 Ports, RS232/RS485 |
5.1 W |
|
Thermocouple, mV |
5.9 W |
| Series 2 I/O Cards | |
|
Series 2 AI, 4-20 mA with HART Simplex/ Redundant |
8.4 W 9.1 W (per card) |
|
Series 2 AI, 16-channel, 4-20 mA HART (Simplex) |
12.7 W |
|
Series 2 AO, 4-20 mA with HART Simplex/ Redundant |
10.2 W 10.2 W (per card) |
|
Series 2 AS-Interface (Simplex) |
9.6 W |
|
Series 2 DeviceNet (Simplex) |
11.4 W |
|
Series 2 DI, 8-Channel, 24 VDC Dry Contact Simplex/ Redundant |
3.7 W (per card) |
|
Series 2 DI, 32-Channel, 24 VDC Dry Contact (Simplex) |
5.7 W |
|
Series 2 DO, 8-Channel, 24 VDC, High-Side Simplex/ Redundant |
3.7 W (per card) |
|
Series 2 DO, 32-Channel, 24 VDC, High-Side (Simplex) |
3.0 W + load dependent power dissipation (27 W maximum at 24 V)(3) |
|
Series 2 H1 Simplex/ Redundant |
6.1 W (per card) |
|
Series 2 Isolated Input (Simplex) |
5.9 W |
|
Series 2 Profibus (Simplex) |
10.1 W |
|
Series 2 RTD, ohms (Simplex) |
2.7 W |
|
Series 2 Thermocouple (Simplex) |
3.5 W |
|
Series 2 Serial Simplex/ Redundant |
5.1 W (per card) |
| Intrinsically Safe I/O Cards | |
|
I.S. AI, 8-Channel, 4-20, mA, HART |
9.8 W |
|
I.S. AO, 8-Channel, 4-20, mA (and HART) |
11.3 W |
|
I.S. DI, 16-Channel |
7.6 W |
|
I.S. DO, 4-Channel |
10.1 W |
| Power Supplies (4) | |
|
Legacy DIN rail-mounted Bulk AC to 12 VDC Power Supply |
12 W |
|
Legacy DIN rail-mounted Bulk AC to 24 VDC Power Supply |
12 W |
|
Legacy Panel-mounted Bulk AC to 12 VDC Power Supply |
22 W |
|
Legacy Panel-mounted Bulk AC to 24 VDC Power Supply |
22 W |
|
Legacy Bulk 24 VDC to 12 VDC Power Supply |
14.5 W |
|
System Power Supply (AC/DC) |
4.4 W |
|
System Power Supply (Dual DC/DC) |
|
| DeltaV SIS Components | |
|
Simplex Logic Solver |
16.0 W |
|
Redundant Logic Solvers |
24.0 W |
|
SISNet Repeaters |
9.6 W (per Repeater) |
|
Auxiliary Relay Modules, Energize to Actuate and De-Energize to Actuate, 24 VDC |
4.65 W |
|
Auxiliary Relay Diode Module |
2.25 W |
| Miscellaneous Components | |
|
Fieldbus H1 carrier |
5.2 W(5) |
|
Media Converter |
5.1 W |
|
Single Port Fiber Switch |
8.2 W |
|
Four Port Fiber Switch |
8.4 W |
|
I.S. LocalBus Isolator |
1.2 W |
|
I.S. System Power Supply |
1.5 W |