Output Wiring - Model 1700/2700 An Transmitters; Overview; Output Terminals And Output Types; Output Wiring - Emerson Micro Motion 2700 Installation Manual

Chapter 4
Output Wiring – Model 1700/2700
AN Transmitters
4.1

Overview

This chapter explains how to wire outputs for Model 1700 or 2700 AN transmitters (transmitters with
the analog outputs option board).
Note: If you don't know what outputs option board is in your transmitter, see Section 1.4. To wire
outputs on Model 1700/2700 transmitters with the intrinsically safe outputs option board, see
Chapter 5. To wire outputs on Model 2700 transmitters with the configurable input/outputs option
board, see Chapter 6.
It is the user's responsibility to verify that the specific installation meets the local and national safety
requirements and electrical codes.
4.2

Output terminals and output types

Table 4-1 describes the outputs and communication protocols available for the Model 1700 or 2700
AN transmitter.
Table 4-1 Terminals and output types
Terminals Model 1700 output type
1 & 2 Milliamp/Bell 202
3 & 4 Frequency
5 & 6 RS-485
(1) The Bell 202 signal is superimposed on the mA output.
4.3

Output wiring

Output wiring requirements depend on how you will use the analog functionality and the HART or
Modbus protocol. This chapter describes several possible configurations:
• Figure 4-1 shows the wiring requirements for the mA output (terminals 1 and 2) and the
frequency output (terminals 3 and 4).
• Figure 4-2 shows the wiring requirements for the mA output (terminals 1 and 2) if it will be
used for HART communications in addition to the mA signal.
• Figure 4-3 shows the wiring requirements for RS-485 communications using the RS-485
output (terminals 5 and 6).
• Figure 4-4 shows the wiring requirements for connecting the transmitter to a HART multidrop
network.
Transmitter Installation: Model 1700 and 2700 Transmitters
Model 2700 output type
(1)
Milliamp/Bell 202
• Frequency (default)
• Discrete
RS-485
Communication
(1)
HART
None
• Modbus (default)
• HART
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