Rockwell Automation 1794-ASB/E_ASB2/D_ASBK/E_ASB2K/D Remote I/O Adapter Modules Installation Instructions - Manual (Page 3)

FLEX I/O Remote I/O Adapter Modules 3
Publication 1794-IN098E-EN-P - January 2011
6. Before installing the new adapter, notice the notch on the right rear of
the adapter. This notch accepts the hook on the terminal base unit.
The notch is open at the bottom. The hook and adjacent connection
point keep the terminal base and the adapter tight together, reducing
the possibility of a break in communication over the backplane.
7. Complete the adapter mounting as shown below.
8. If the adapter module does not lock in place, use a screwdriver or
similar device to move the locking tab down while pressing the
adapter module flush onto the DIN rail, and release the locking tab to
lock the adapter module in place. If necessary, push up on the locking
tab to lock.
9. Reinstall the module in the adjacent terminal base unit.
Connect the Wiring
1. Connect the remote I/O cable to the removable remote I/O
connector.
2. Connect +V DC power to the left side of the lower connector,
terminal A.
3. Connect -V common to the left side of the upper connector,
terminal B.
4. Connections C and D are used to pass +V DC power (D) and -V
common (C) to the next module in the series (if required).
Set the Addressing Mode Switches
1. Lift the hinged switch cover on the front of the adapter to expose the
switches.
2. Set the switches as shown below.
3. Cycle power to the adapter after setting the switches.
ATTENTION
Do not wire more than 2 conductors on any single terminal.
Connect To terminal
Blue Wire - RIO 1
Shield Wire - RIO SH
Clear Wire - RIO 2
WARNING If you connect or disconnect wiring while the field-side 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.
C
Push down and in at the same
time to lock the adapter to the
DIN rail. When the adapter is locked onto the DIN
rail, gently push the FlexBus connector into
the adapter to complete the backplane
20127
1 SH 2
D A
24V
COM
Allen-Bradley
24 VDC POWER SUPPLY RIO ADAPTER 1794-ASB
ADAPTER ACTIVE FAULT LOCAL
FAULT
Termination resistor (if required)
82W or 150W (refer to your
processor documentation for size and
usage)
PWR
C B
20131
ATTENTION
If this is the last adapter, you must terminate the remote I/O link here. Use a
terminating resistor connected across terminals 1 and 2. Refer to your processor
manual for information on the size of the resistor.
WARNING When you change switch settings 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.
ATTENTION
Some switches on this adapter differ from the switches on previous versions.
Make certain that you identify each switch before setting.
8 and 16-point Mode Switch Settings
When using this
addressing
mode And Mode
Switch 2
S1-1
Mode
Switch 1
S2-5
Mode
Switch 0
S2-8
Standard (as
shipped) 8 and/or 16-point
modules See note 1 ON ON
Compact 8-point modules OFF ON OFF
16-point modules ON ON OFF
Complementary See complementary table below.
Primary Chassis 8-point modules OFF OFF ON
Complementary
Chassis ON OFF ON
Complementary See complementary table below.
Primary Chassis 16-point modules OFF OFF OFF
Complementary
Chassis ON OFF OFF
1 In Standard mode, this switch retains its function as switch position 1 of rack addressing.
In standard mode, the module is functionally interchangeable with 1794-ASB series A or B
adapters.
2 In compact mode, 32-point modules appear as 8 or 16-point modules.
3 When programming block transfers, address analog modules as module 0 if switch S1-1
is on; module 1 if switch S1-1 is off.
32-point Mode Switch Settings
When using
this
addressing
mode And Mode
Switch 0
S2-8
Mode
Switch 1
S2-5
Mode
Switch 2
S1-1
Mode
Switch 3
S2-3
Mode
Switch 4
S2-4
Standard – 32 8, 16
and/or
32-point
modules ON ON See note 1 OFF OFF
Complementary
– 32
8
7
6
5
4
3
2
1 8
7
6
5
4
3
2
1
S1 S2
Flip
open
cover on on