At a Glance

The characteristics are specified for a load rate of 60% of the channels.

If the rate is greater than 60%, the following downgrade curve must be taken into consideration.

NOTE: There is no temperature derating for relay modules. Users must therefore check that the overall consumption of the 24 VDC power supply is sufficient.
NOTE: For static outputs, temperature derating is carried out on the basis of the maximum current produced by the active outputs.

Altitude Operating Conditions

The temperature derating applies to the modules for use at altitude up to 2000 m (6560 ft). When the modules operate above 2000 m (6560 ft), apply additional derating. For detailed information, refer to chapter Operating and Storage Conditions.

Examples

  • BMX DDO 1602

    Suppose the BMX DDO 1602 module with sixteen 24 VDC/0.5 A outputs produces 0.5 A per channel. For an ambient temperature reading of between 0°C and 40°C, the maximum admissible current in the module is equal to 16 x 0.5 = 8 A. Above 40°C, the downgrading curve must be applied. At 60°C, the maximum current in 24 VDC must not exceed 8 x 60% = 4.8 A. This value corresponds to 10 outputs at 0.5 A or 16 outputs at 0.3 A or other combinations.

  • BMX DDO 6402

    Suppose the BMX DDO 6402 K module with sixty-four 24 VDC/0.1 A outputs produces 0.1 A per channel. For an ambient temperature reading of between 0°C and 40°C, the maximum admissible current in the module is equal to 64 x 0.1 = 6.4 A. Above 40°C, the downgrading curve must be applied. At 60°C, the maximum current in 24 VDC must not exceed 6.4 x 60% = 3.8 A. This value corresponds to 38 outputs at 0.1 A or 64 outputs at 0.05 A or other combinations.

  • BMX DAO 1605

    Suppose the BMX DAO 1605 module with sixteen 220 VAC outputs producing 0.3 A per channel. For an ambient temperature reading of between 0°C and 40°C, the maximum admissible current in the module is equal to 16 x 0.3 A = 4.8 A (2,4 A per 8-channel group maximum). Above 40°C, the downgrading curve must be applied. At 60°C, the maximum current in 220 Vac must not exceed 4.8 A x 0.6 = 2.9 A (1.5 A per 8-channel group maximum). This value corresponds to 10 outputs at 0.3 A or to 16 outputs at 0.18 A.