Emerson Process Management 1500 4.3Configuring the channels, 2 Channel configuration options

Required Transmitter Configuration

4.3Configuring the channels

The six input/output terminals provided on the Model 1500 are organized into three pairs. These pairs are called Channels A, B, and C. The channels should be configured before doing any other I/O configuration.

CAUTION

Changing the channel configuration without verifying I/O configuration can produce process error.

When the configuration of a channel is changed, the channel’s behavior will be controlled by the I/O configuration that is stored for the new channel type, which may or may not be appropriate for the process. To avoid causing process error:

•Configure the channels before configuring the I/O.

•When changing channel configuration, be sure that all control loops affected by this channel are under manual control.

•Before returning the loop to automatic control, ensure that the channel's I/O is correctly configured for your process. See Sections 4.5, 4.6, and 4.7.

The outputs and variable assignments are controlled by the channel configuration. Table 4-2 shows how each channel may be configured and the power options for each channel.

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Table 4-2Channel configuration options

Channel	Terminals	Configuration Option	Power
A	21 & 22	mA output (not configurable)	Internal (not configurable)
B	23 & 24	Discrete output 1 (DO1)	Internal or external(1)
C	31 & 32	Discrete output 2 (DO2)	Internal or external(1)
		Discrete input (DI)

(1) If set to external power, you must provide power to the outputs.

To configure the channels, see the menu flowchart in Figure 4-5.

Figure 4-5Configuring the channels

ProLink Menu

Configuration

Channel

Channel B

·Type assignment

·Power type

Channel C

·Type assignment

·Power type

Before You Begin

Using ProLink II

Flowmeter Startup

Required Configuration

Configuration and Use Manual 19