
Chapter 4
Output Wiring – Model 1700/2700
Analog Transmitters
4.1Overview
This chapter explains how to wire outputs for Model 1700 or 2700 transmitters with the analog outputs option board (output option code A).
Note: If you do not know what outputs option board is in your transmitter, see Section 1.4.
It is the user’s responsibility to verify that the specific installation meets the local and national safety requirements and electrical codes.
4.2Output terminals and output types
Table
Table 4-1 Terminals and output types
Terminals | Model 1700 output type | Model 2700 output type | Communication |
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1 & 2 | Milliamp/Bell 202(1) | Milliamp/Bell 202(1) | HART |
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3 & 4 | Frequency | • Frequency (default) | None |
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| • Discrete |
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5 & 6 | • HART (default) | ||
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| • Modbus |
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(1)The Bell 202 signal is superimposed on the mA output.
4.3Output 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.
Before You Begin
Installing the Transmitter
Sensor Wiring
Output Wiring – Analog
Installation Manual | 29 |