Leviton A8911 Manuel D'installation Et D'utilisation page 8

3 ELECTRICAL CONNECTIONS
5.
Set the Modbus address dipswitches and baud rate dipswitch. For more information on the switch
options, see the section below for configuration.
6.
Turn on the power supply. Confirm the green Alive LED starts blinking. Also check the RS485
yellow LEDs.
• If the yellow RX led is blinking, the A8911-23 is receiving Modbus traffic on the RS485 port.
• If the yellow TX led is blinking, then the A8911-23 is receiving a Modbus query specifically addressed
to it and will respond to the query.
• If you are using an AcquiSuite Data Acquisition Server, the A9811-23 should appear in the Modbus
device list after about 2 minutes. Click on the device, and select "Configure" to give the A8911-23 a
logical name. This will allow the AcquiSuite to begin logging data for the device.
7.
With the power disconnected, attach the pulse input lines to the pulse terminals. Each pulse input
should have a GND and a P# terminal. If the pulse output device is polarity sensitive, attach the pulse
– terminal to the A8911-23 GND terminal, and the pulse + terminal to the A8911-23 P# terminal. The
A8911-23 provides 3-5 volts on the P# terminal for sensing. The remote pulse output device must not
supply voltage to the terminals.
Wiring runs to pulse input terminals should be kept as short as possible. Wiring runs longer than 200
ft should be avoided. Wiring should avoid proximity to sources of electrical noise such as running in
parallel to electrical cable, and VFD systems.
8.
Power up the A8911-23. The Input LEDs for each connected input should now blink. The input LED will
be on when the contacts are closed.
WARNING: After wiring the A8911-23, remove all scraps of wire or foil shield from the electrical
panel. This could be dangerous if wire scraps come into contact with high voltage wires.
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