User manual

Publication CIG-WD001B-EN-P - May 2005
19-2 1794 FLEX I/O Modules
24V Common Use terminal to pass 24V
common to next module
in series (if necessary)
24V dc
Use terminal to pass 24V dc
power to next module
in series (if necessary)
Ethernet Connector
If you connect or disconnect the Ethernet cable with power applied to
the adapter or any device on the network, an electrical arc can occur.
This could cause an explosion in hazardous location installations. Be
sure that power is removed or the area is nonhazardous before proceeding.
WARNING
1794-AENT
WARNING
When you connect or disconnect the PROFIBUS
cable while power is on, an electrical arc can occur
This could cause an explosion in hazardous location
installations. Be sure that power is removed or the
area is nonhazardous before proceeding.
Connect the PROFIBUS drop cable to the 9-pin D-shell connector
according to the following pin assignments and graphic:
9
Shield
1
RP 2
B/B' RXD/TXD-P 3
CTNR-P
4
C/C' DGND 5
VP 6
RP
7
A/A' RXD/TXD-N
RS-485
Reference
Signal Description
8
Pin #
CTNR-N
Shield, RC to earth ground
not used
Receive/transmit data - P
not used
Data ground
Voltage plus (+5V)
not used
Receive/transmit data - N
not used
Metal Shell Earth Ground
1
.
.
+ 5 V
Data Ground
Signal +
Shield
Pin #1
5
RCV/ Xmit Data +
9
6
.
.
DROP CABLE
1 MΩ
Pin #3
Pin #5
Pin #6
Signal -
Pin #8
Earth Ground
RCV/ Xmit Data -
24V Common Use terminal to pass 24V
common to next module
in series (if necessary)
24V dc
Use terminal to pass 24V dc
power to next module
in series (if necessary)
Profibus Connector
0.01µF
500V dc
1794-APB