Emerson 2400S - Manual (Page 25)

Installation Manual 21
P
o
wer Su
ppl
y
I/O
W
irin
g
– DP
an
d
DN
I/
O W
iri
n
g
– AN
Be
fo
re
Y
o
u
Begin
Chapter 4
I/O Wiring – Model 2400S PROFIBUS-DP and
DeviceNet Transmitters
4.1 Overview
This chapter describes how to wire I/O for Model 2400S PROFIBUS-DP and DeviceNet transmitters.
Note: To wire I/O for Model 2400S Analog transmitters, see Chapter 3.
It is the user’s responsibility to verify that the specific installation meets the local and national safety
requirements and electrical codes.
4.2 Moisture protection
When rotating or wiring the transmitter, guard against condensation or excessive moisture inside the
transmitter housing. Be sure that the conduit openings are completely sealed after all installation and
wiring procedures have been performed.
Improperly sealed housings can expose electronics to moisture, which can cause measurement error
or flowmeter failure. Install the meter so that the conduit openings do not point upward, and install drip
legs in conduit or cable. Inspect and grease all gaskets and O-rings. Fully close and tighten all housing
covers and conduit openings.
4.3 I/O wiring for Model 2400S PROFIBUS-DP transmitters
To connect the I/O wiring for a 2400S PROFIBUS-DP transmitter:
1. Remove the user interface cover and user interface module. See Section 2.4 for instructions.
2. Wire the transmitter to the PROFIBUS-DP segment according to the diagram in Figure 4-1.
Follow all local safety regulations.
3. Replace the user interface module and user interface cover.
Note: It is not necessary to open the power compartment to wire the outputs. Do not open the power
compartment unless you are also wiring the power supply.
Note: The PROFIBUS cable shield is required to be grounded at both ends. At the 2400S, ground the
cable shield in an appropriate cable gland. If an optional PROFIBUS-DP Eurofast M12 connector is
used, the cable shield is grounded via the threads of the connector.
Hazardous voltage can cause severe injury or death. Keep the power supply compartment closed while
wiring the transmitter outputs, or shut off power to the transmitter.
A transmitter that has been improperly wired or installed in a hazardous area could cause an explosion.
Make sure the transmitter is wired to meet or exceed local code requirements. Install the transmitter in
an environment that complies with the classification tag on the transmitter.