Working voltage and isolation voltage ratings, Ab c – Rockwell Automation 1794-OW8_OW8K_OW8XT Flex I/O 8 Output Relay Module User Manual
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Publication 1794-IN019H-EN-P - January 2011
Working Voltage and Isolation Voltage Ratings
Wiring to a 1794-TB2, 1794-TB3 or 1794-TB3S Terminal Base Unit
1.
Connect individual output relay contact (customer load) wiring to
numbered terminals on the 0…15 row (A) as indicated in the table below.
The even numbered terminals are one pole of the relay contacts; the odd
numbered terminals are the other pole of the relay contacts.
2.
Connect 24V DC return to terminal 16 on the 16…33 row (B).
3.
Connect +24V DC power to terminal 34 on the 34…51 row (C).
4.
If daisychaining power to the next terminal base, connect a jumper from
terminal 51 (+V DC) on this base unit to terminal 34 on the next base unit.
5.
If continuing DC common to the next base unit, connect a jumper from
terminal 33 (common) on this base unit to terminal 16 on the next base
unit.
Wiring to a 1794-TBN or 1794-TBNF Terminal Base Unit
1.
Connect individual output relay contact (customer load) to even numbered
terminals 0…14 on row (B) and odd numbered terminals 1…15 on row
(C)
as indicated in the table below. The even numbered terminals are one
pole of the relay contacts; the odd numbered terminals are the other pole
of the relay contacts.
2.
Connect 24V DC return to terminal 16 on the 16…33 row (B).
3.
Connect +24V DC power to terminal 34 on the 34…51
row (C).
4.
If daisychaining power to the next terminal base, connect a jumper from
terminal 51 (+V DC) on this base unit to terminal 34 on the next base unit.
5.
If continuing DC common to the next base unit, connect a jumper from
terminal 33 (common) on this base unit to terminal 16 on the next base
unit.
Terminal Base
24V
120V
230V
Isolation Voltage
1794-TBN, 1794-TBNK,
1794-TBNF, 1794-TBNFK
AC/DC
AC/DC
AC/DC
Dependent upon installed
module - refer to individual
installation instructions for
your specific module.
1794-TB2, 1794-TB3, 1794-TB3K,
1794-TB3S
AC/DC
AC/DC
1794-TB3T, 1794-TB3TS
AC/DC
AC/DC
1794-TB3G, 1794-TB3GK,
1794-TB3GS
AC/DC
1794-TB32, 1794-TB32S
AC/DC
1794-TBKD
DC
AC
ATTENTION
If multiple power sources are used, do not exceed the specified isolation
voltage.
ATTENTION
Apply only 24V DC power to the power terminals on the terminal base
unit.
Make certain that all relay wiring is properly connected before applying
any power to the module.
ATTENTION
Total current through the terminal base unit is limited to 10 A. Separate
power connections to the terminal base unit may be necessary.
ATTENTION
Do not attempt to increase load current or wattage capability beyond the
maximum rating by connecting 2 or more outputs in parallel. The slightest
variation in relay switching time may cause one relay to momentarily
switch the total load current.
ATTENTION
Apply only 24V DC power to the power terminals on the terminal base
unit.
Make certain that all relay wiring is properly connected before applying
any power to the module.
ATTENTION
When using 240V power to a relay, you must connect a snubber across the
load. Failure to connect a snubber across the load (relay contacts) can
result in generation of electromagnetic noise which could disrupt nearby
electrical equipment, including your 1794 FLEX I/O chassis. Use
Allen-Bradley part number 599-KA04 or 1401-NX1.
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
51
34
1794-TB2
0...15
34...51
16...33
A
B
C
Output Relay Contacts (customer loads)
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
34
1794-TB3
0...15
34...51
16...33
A
B
C
Output Relay Contacts (customer loads)
0
1
2
3
4
5
6
7
8
9
10
11 12
13
14
15
18
19 20
21
22
23
33
24
25
26
27 28
29 30
31 32
17
35 36
37 38
47
48
49
50
34
51
16
Label placed at top of wiring area
Row A
Row B
Row C
Row A
Row B
Row C
39
40
41 42
43
44
45 46
1794-TB3S
45286
0
2
4
6
8
10
12
14
33
16
1
3
5
7
9
11
13
15
51
34
1794-TBN, 1794-TBNF
16
33
Even Numbered Terminals 0...14
34
51
Odd Numbered Terminals 1...15
45285