Emerson Series 3000 MVD User Manual

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Follow the steps below to set up Bell 202 communications between the Series 3000 device and a 
remote device.

1. Locate and identify the primary mA output terminals on the Series 3000 device. Refer to 

Table 3-3 and Figure 2-2. Additionally, the Series 3000 device has a label or card that shows 
input/output wiring terminal designations. See Figure 2-3.

2. Determine if the primary mA output will be used to report both analog (mA) process data and 

HART digital data. It may already be wired for analog output.

3. Using twisted-pair shielded cable, and a signal converter if required, connect the remote device 

to the Series 3000 device’s primary mA output terminals. Maximum cable length between the 
Series 3000 device and the remote device is 4000 feet (1200 meters).

If the output will be used for HART digital communications only, see the following:

•

Model 3300 or Model 3500 with screw-type or solder-tail terminals: Figure 3-4

•

Model 3300 or Model 3500 with I/O cables: Figure 3-5

•

Model 3350 or Model 3700: Figure 3-6

Additionally, the following wiring examples are provided:

•

Using the primary mA outputs for both digital communication and analog output 
(HART/analog single-loop wiring) – see Figure 3-7

•

Wiring the Series 3000 device to a HART multidrop network – see Figure 3-8

•

Wiring for pressure or external temperature compensation – see Figure 3-9

•

Wiring the Series 3000 device to a HART Tri-Loop – see Figure 3-10

•

Wiring for pressure or external temperature compensation with HART Tri-Loop – see 
Figure 3-11

4. The HART interface must be connected across a resistance of 250–600 

Ω. Add resistance to 

the connection if necessary.

5. Configure Bell 202 communications as described in Section 13.4.

Model 3300 or Model 3500 with
screw-type or solder-tail 
connectors

Input/output wiring terminal block

c 2

a 2

Model 3300 or Model 3500 with 
I/O cable

I/O terminal block on DIN rail

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15

Model 3350 or Model 3700

Gray terminal block, non-intrinsically safe 
wiring compartment

2

1