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November 2014
Step 3: Set the switches
The transmitter's default configuration for the AC Termination is in the off
position. The transmitter's default configuration for the security switch is in the
off position.
1. If the transmitter is installed, secure the bus and remove power.
2. Remove the housing cover opposite the field terminals side. Do not remove
the housing cover in explosive environments.
3. Slide the security and AC Termination switches into the preferred position by
using a small screwdriver. Note that the security switch will need to be in the
off position in order to make any configuration changes.
4. Reinstall the housing cover and tighten so that the cover is fully seated with
metal to metal contact between the housing and cover in order to meet
explosion proof requirements.
Figure 6. Transmitter Switch Configuration
A
A. Security
B. AC termination
Step 4: Wiring and power up
Use the following steps to wire the transmitter:
1. Remove the cover on the field terminals side of the housing.
2. Set up based on optional process temperature input.
a. If the optional process temperature input is being utilized, follow the
procedure
on page
b. If there will not be an optional temperature input, plug and seal the unused
conduit connection.
3. Connect the positive lead from the power source to the "PWR +" terminal, and
the negative lead to the "PWR –" terminal.
4. Connect the transmitter to the RS-485 bus as shown in
a. Connect the A lead to the "A" terminal.
b. Connect the B lead to the "B" terminal.
Note
The Rosemount 4088 MultiVariable Transmitter uses RS-485 Modbus
bit and no parity. The default baud rate is 9600.
B
"Install optional process temperature input (PT 100 RTD sensor)"
14.
Quick Start Guide
Figure
7.
®
with 8 data bits, one stop
9
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