Rockwell Automation 2705 RediPanel Push Button Module - Manual (Page 39)

Chapter 3
Wiring and Installation
3–16
The Remote I/O link begins at the scanner module. The scanner modules
and controllers impose physical and logical limitations on the link.
•
The push button module is addressed like a remote I/O rack.
•
The link can have up to 32 remote I/O devices. Refer to the appropriate
PLC/SLC manual.
•
The baud rate limits the maximum cable length (link distance):
Baud Rate Cable Length (Maximum)
57.6 K 3,000 meters (10,000 feet)
115.2K 1,500 meters (5,000 feet)
230.4K 750 meters (2,500 feet)
The connection to the link is through the Serial Data Link cable (Catalog No.
1770-CD). This cable wires into the connector plug of the module.
Connect the Push Button Module to the scanner module with the
Allen-Bradley I/O cable (Catalog No. 1770-CD) or Belden 9463.
A connector plug is provided with each Push Button Module. Wire the
connector to the I/O cable as shown below.
TWIN-AXIAL CABLE
CLEAR (LINE 2)
BLUE (LINE 1)
SHIELD
2705 MODULE
MATING CONNECTOR
Wiring Connections for Communications Cable
A Belden twin-axial cable links the RediPANEL Module to the Remote I/O
communications. It wires the mating connector of the user’s scanner module
to the mating connector of the 2705 module. It is recommended that you
terminate the first and last device on the remote I/O link. Install a 150 ohm,
1/2 watt resistor between lines 1 and 2 at both ends of the link for up to 16
devices and an 82 ohm, 1/2 watt resistor for up to 32 devices on the link.
Connecting to a
Remote I/O Link
Connecting to
a Scanner Module