13
Communications
Connections
The standard SMC20 provides two
communication connections:
D
An RS232C-compatible port for printer.
D
An RS422/485-compatible port for
Hand-Held Programming Terminal.
Figure 2-20. Communication
Connections
For normal operation you only need to
plug the Hand-Held Terminal into the
RS485 connector. You can use the
RS232C port to list programs (programs
that have been setup with the
Hand–Held Terminal) to a printer or a
personal computer. Figure 2-21 below
shows the RS232C connection.
Figure 2-21. RS232C Pin Layout,
Cable End
Pin
No.
Name
Description
1
DCD
Not used
2
RX
Serial data input.
3
TX
Serial data output.
4
DRT
Not used
5
COM
Signal common
(ground).
6
DSR
Not used
7
RTS
Not used
8
CTS
Not used
9
+5V
+5V (optional)
Table 2-6. RS232C Port Signals
Installation Checklist
The following checks should be checked
prior to applying power to the SMC20
controller.
CAUTION
Use of this or similar controllers
involves motion of electric (or
hydraulic) actuators which have the
potential for exerting force or high
velocity motion, which can cause
machine damage or personal injury.
Verify all connections before applying
power to the controller. It is a must
that the User install Emergency
Shutdown provisions which operate
independently of this controller. The
Emergency Shutdown should remove
power from actuators and should be
easy to reach by operators at all
times.
1.
Inspect controller for damage or
missing parts. If there is any diffi-
culty, contact your supplier.
2.
Be sure the controller is mounted
in accordance with mounting and
ventilation recommendations.
(See page ###.)
3.
Connect AC power. Be sure that
the GND connection is made to a
suitable earth ground. [Green
Wire]
4.
Perform a power up test as
follows:
– If you have pre–wired the unit,
temporarily unplug both 32 pin
axis connectors.
– Apply AC power and verify that
the four (4) power supply
monitor lights are on ISOL
PWR, +5V, +15V, –15V. These
LED’s are located on the left.
5.
Turn power ’Off’ and re–install
the axis connectors. Install or
check all wiring required for your
application.
Remove electric and/or
hydraulic power from the
actuators.
Perform power up test as in #4
above.
6.
Inspect enable and safety cir-
cuits wiring for correctness.
Remove electric and/or
hydraulic power from the
actuators.
Perform power up test as in #4
above.
7.
Perform setup procedures in
Chapter 3 before applying power
to the actuators.
Table 2-7. Checklist
