Rockwell Automation 937CU-AISTR-DC1 Strain Gauge Converter Installation Instructions - Manual (Page 8)

6
Bul. 937
C Strain Gauge Converter Installation Instructions
Terminals
The remaining green terminals have the
following functions:
• Terminals 7/8: current output
• Terminal 9: only for voltage output (see
below.)
• Terminals 10 ... 12: relay 1
• Terminals 13/14: binary input 1
• Terminals 15/14: binary input 2
• Terminals 16 ... 18: relay 2
• Terminals 19 ... 21: RS 485 interface
(deactivated if plug is in RS 232 interface)
• Terminal 22: not used
• Terminals 23/24: power supply 24 V DC
If you connect terminals 7 and 9 by means of a
bridge, a voltage output of - 10 V ... + 10 V
results between this bridge and terminal 8. The
built-in shunt resistance is 500
Ω.
The RS 485 interface is galvanically isolated
from other circuits. It is deactivated if you plug a
connector into the socket of the RS 232
interface on the front panel of the Strain
Gauge Converters.
Further information on connecting the Strain
Gauge Converters (e. g. on using the Power
Rail) can be found in the data sheet and in the
operating instructions for the Bul. 937 system
on our Internet page www.ab.com. 2 233 2244
2
3
1
8
7
1188
1177
1166
1122
1111
1100
5
6
4
1144
1155
1133
P
N
9
RS 232
RS 485
21+
GND
19-
20
Binary
inputs