Introduction
The 3300 / 9300 / 9400 / 9500 series controllers can all be
ordered or retrofitted with either an RS232 or RS485 serial
communications interface board. If the controller has the
communications interface fitted then skip to the section
titled
Installation/Cabling
.
Feature RS232
RS485
Type of transmission lines
Unbalanced
Differential
Maximum number of drivers
1
128
Maximum number of receivers
1
128
Maximum cable length
15m
1200m
Maximum data rate
19.2Kb/sec
19.2Kb/sec
Maximum CMV
+/- 25V
+12 to -7V
Table lists the features of both RS232 and RS485 standards.
Cable:
To ensure data integrity over long transmission
distances, it is recommended that good quality RS485 cable
is used.
Recommended:
RS485: Belden 9841, RS232: Belden 9501
available from most leading distributors, and stocked by
CAL.
2
FITTING A COMMUNICATIONS INTERFACE BOARD
The RS232 and RS485 interface boards are interchangeable
and are fitted in exactly the same way, please read the fitting
and safety instructions before proceeding.
Caution:
Live circuits can hold charge for short
periods after isolation from the voltage supply.
Electrostatic precautions should be observed
when handling the controller outside the sleeve.
After isolating the controller from it’s supply, the controller
front bezel and circuit board assembly can be unplugged
from the sleeve. Grasp the bezel firmly by the recesses on
each side and pull. A screwdriver can be used as a lever if
required.
To fit the RS232 or RS485 interface you will require the
following parts, which are supplied with the interface.
Nylon Full Nut
Code – 082-042
Brass Half Nut
Code – 082-041
Nylon Screw
Code – 082-028
Nylon Spacer
Code – 082-012
