Emerson 2400S installation manual Hazardous area inductance, 3.5.2Hazardous area mA wiring

I/O Wiring – Model 2400S Analog Transmitters

Hazardous area inductance

The inductance (Li) of the Model 2400S transmitter is 0.0 mH. This value plus the field wiring inductance (Lcable) must be lower than the maximum allowable inductance (La) specified by the IS barrier. The following equation can then be used to calculate the maximum cable length between the transmitter and the barrier:

Li + Lcable ≤ La

3.5.2Hazardous area mA wiring

Figure 3-15illustrates the basic hazardous area wiring for the Model 2400S Analog transmitter’s mA output.

Figure 3-15Hazardous area mA output wiring

Hazardous area Safe area

Rbarrier		Vout
	4–20 mA	Rload

Ground

Rbarrier

Vin

Note: Rbarrier and Rload should be added together to determine the proper Vin. Refer to Figure 3-16.

Note: Channel B (terminals 3 and 4) can also be configured this way.

22 Micro Motion® Model 2400S Transmitters