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1.1 Specifications
The controller's Modbusr communication capability:
D
Supports industry-standard Modbusr RTU protocol.
D
Connects to a Modbusr master singly or over an
RS-485 network.
D
Uses standard baud rates of 9600 or 19200.
1.2 Configurations
The controller can communicate directly to a Modbusr
master or participate in a network of devices. See
Figure 1-1 for the possible configurations.
Note: Install communication conductors in raceways,
cables, or conduit separate from AC power
conductors.
Modbusr
Master
Single Connection
Modbusr
RS-485
Modbus
RS-485
Modbus
Controller)
RS-485
Modbusr
To additional network devices
or RS-485 network termination
Network Connection
Figure 1-1 RS-485 Configurations
Modbusr is a registered trademark of Schneider Electric.
TP-6208 4/03
Section 1 Controller Connection and Setup
RS-485
ATS
Controller
Master
Slave
r
Slave (ATS
Slave
1.3 Hardware Connections
Hazardous voltage.
Will cause severe injury or death.
Disconnect all power sources before
opening the enclosure.
Electrostatic discharge damage. Electrostatic discharge
(ESD) damages electronic circuit boards.
electrostatic discharge damage by wearing an approved
grounding wrist strap when handling electronic circuit boards
or integrated circuits. An approved grounding wrist strap
provides a high resistance (about 1 megohm), not a direct
short, to ground.
Modbusr Network Interface (MNI).
non-isolated RS-485 port with connection speeds of 9.6
kbps and 19.2 kbps for connection to building
management systems, programmable logic controls,
etc.
Use RTU (remote terminal unit) protocol for
communication through this port.
Connect Modbusr communications cables to terminal
strip TB1 on the controller assembly on the inside of the
enclosure door.
Disconnect power to the transfer switch by opening
switches or circuit breakers before opening the
enclosure.
Open the controller housing and locate
terminal strip TB1.
Connect the Modbusr input and output to the terminals
shown in Figure 1-4. Use #12--24 AWG twisted-pair
wire;
Belden
recommended. Connect the shield to ground as shown
in Figure 1-4.
(4.4 in. lbs.). Replace the controller housing cover.
Close and lock the transfer switch enclosure door before
reconnecting the power.
tp6113
DANGER
NOTICE
See Figure 1-2 and Figure 1-3.
cable
#9841
or
Tighten the connections to 0.5 Nm
Section 1 Controller Connection and Setup
Prevent
This is a
equivalent
is
1
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