11
User selectable options
The DIL switches on the communication board
are used for selecting the operation modes of
the serial interfaces.
Serial interface 1:
Mode
S1.1
S1.2
RS 232
OFF
OFF
Current loop
ON
ON
Serial interface 2:
Mode
S1.3
S1.4
S1.5
S1.6
S1.7
Note
RS 485
ON
ON
OFF
OFF
OFF
RS 485 is active
Serial interface 4:
Mode
S3.1
S3.2
S3.3
S3.4
S3.5
S3.6
S3.7
S3.8
RS 232
ON
OFF
ON
OFF
OFF
OFF
OFF
OFF
Current loop
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
|
|
DCD CTS
Short-circuited to DTR
Power supply
The SRIO 500M unit can be supplied from two
sources:
Supply 1: 80...265 V DC or
(device type SRIO 500M AA)
19...70 V DC
(device type SRIO 500M BA)
Supply 2: 80...265 V AC or DC
The supply voltages are connected to the screw
terminals 20...24 of the rear plate:
Screw terminal 20:
supply 2 minus
Screw terminal 21:
supply 2 plus
Screw terminal 22:
shield ground
Screw terminal 23:
supply 1 minus
Screw terminal 24:
supply 1 plus
