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LF-Series Flowmeters: Sensor/Transmitter Installation 53
I/O Wiring – DIN CIO Return PolicySpecificationsI/O Wiring – DIN AN
Chapter 10
I/O Wiring – DIN CIO Transmitters
10.1 Overview
This chapter describes how to wire the inputs and outputs for LF-Series DIN CIO transmitters. If you
don’t know your transmitter type, see Section 1.6.
It is the user’s responsibility to verify that the specific installation meets the local and national safety
requirements and electrical codes.
10.2 Channel configuration
The six output terminals are divided into three pairs. The pairs are called Channels A, B, and C.
Channel A is terminals 21 and 22; Channel B is terminals 23 and 24; and Channel C is terminals 31
and 32. Variable assignments are governed by channel configuration.
Output wiring requirements depend on how you will configure the transmitter terminals. The
configuration options are shown in Table 10-1 and Figure 10-1. You can use ProLink II software to
configure the channels. See the transmitter configuration manual for more information.
If Channel B is configured as a frequency output or discrete output, it can also be configured to use
either internal or external power. Channel C can be configured to use either internal or external power,
independent of its output configuration.
• “Internal power” means that the terminals are powered automatically by the transmitter. The
output wiring instructions do not include power setup and power wiring.
• “External power” means that the terminals must be connected to an independent power supply.
The output wiring instructions include power setup and power wiring.
Note: The terms “active” and “passive” are sometimes used to describe internally and externally
powered outputs.
Note: You cannot configure the following combination: Channel B = discrete output,
Channel C = frequency output. If you need both a frequency output and a discrete output, use the
following: Channel B = frequency output, Channel C = discrete output. For more information, see the
transmitter configuration manual.