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6.- WIRING
6.1.- POWER SUPPLY, RECOMMENDED WIRING
FUSE and spare fuse
.
Main switch
POWER SUPPLY
230 Vac (115 Vac Optional).
6.2.- PROTECTION FUSES
6.3.- SIGNAL INPUT CONNECTION
The serial ASCII input circuit can be set to one of 10 arrangements. Unless otherwise specified at the time of order,
the input circuit will be factory default set for RS-232 levels. If you are in any doubt about the input conditions, it is
advisable to remove the rear panel of the unit and inspect the internal jumper switch positions.
The operating mode of the unit and baut rate are, unless otherwise specified at the time of order, set for the default
settings of :
MODE : strobed display
BAUD : 1200 ADDRESS : 0
BITS : 8 PARITY : none
If you are in any doubt about these settings, they can be determined by powering up the unit with the input line idle,
and observing the display at power-up.
To change any set-up conditions see the configuration section
The unit has a protection fuse located on the power supply
socket.
If this fuse must be replaced or changed because the power
supply is changed, use the time-lag fuse according to IEC 127/
2 with the values indicated on the table.
1
2
3
N/C
Connections are : 4 way pin connection.
Pin 1 = Signal B
Pin 2 = Signal A
Pin 3 = Signal common
Pin 4 = Not used.
Note : Signal common should be grounded
to system common.
Signal Input
Signal Input Connector
Type
Pin 1
Pin 2
Pin 3
RS-232 ±15 V
Input
+5 V
GND
RS-422/RS-485
Signal B
Signal A
GND
Internal Load
RS-422/RS-485
Signal B
Signal A
GND
External Load
RS-423 ±5 V
Input
+5 V
GND
2 mA Loop Powered
Loop -
Loop +
not used
(Loop internally powered)
Loop +
not used
Loop -
(Loop externally powered)
20 mA Loop Powered
Loop -
Loop +
not used
(Loop internally powered)
Loop +
not used
Loop -
(Loop externally powered)
TTL Level
+5 V
Input
GND
Signal connections are different for different input configurations. They are as follows :
Power
Fuse
Supply
value
230 Vac
0.2 A
115 Vac
0.4 A