EX-RC1
R e m o t e I / O Ad a p t e r
2/12
6
Unitronics
Communication
Connecting the EX-RC1 to a PC
Connect the PC to the adapter via the programming cable. The pinout below shows the RS232 port signals.
Pin #
Description
Pin #1
1
—
2
0V reference
3
TXD signal
4
RXD signal
5
0V reference
6
—
Connecting the EX-RC1 to the CANbus network
Connect the EX-RC1 adapter to an OPLC as shown below. The module communicates via Unitronics’
proprietary UniCAN protocol. UniCAN can comprise up to 60 nodes, including PLCs and EX-RC1
remote I/O adapters.
The CANbus port is galvanically isolated.
CANbus Wiring
121
terminating
resistor
121
terminating
res istor
Circ uit
protection
device
+
-
24V Power
Supply
-V
L
H
+V
PE
-V
L
H
+V
PE
-V
L
H
+V
PE
Network terminators: Place terminators
at each end of the CANbus network.
Resistance must be set to 1%, 121
O
,
1/4W.
Connect ground signal to the earth at
only one point, near the power supply.
The network power supply need not be
at the end of the network.
CANbus Connector
