Allen-Bradley 1791-0A32 B Series User manual

1
32 Output AC Block I/O Module
Cat. No. 1791-0A32 Series B
Installation
Mount the block I/O module in a vertical (recommended) or horizontal position.
Allow sufficient room around the block for cooling air to flow through the block
module. Refer to Figure 1.
Figure 1
Mounting Dimensions for the Block I/O Module
Cat. No. 1791-0A32 (PLC version shown)
2 mounting holes
for 1/4–inch screws
1
30
4.35
(110.5)
3.35
(85.1)
6.95
(176.5) 6.60
(167.6)
0.5
(12.7)
6.95H x 4.35W x 3.85D
(176.5H x 1 10.5W x 98D)
Inches
(Millimeters)
Equipment
Grounding Stud
CAUTION: When tightening grounding
stud nut, do not exceed 15 in-lbs.
Block
Operating temperature
in air gap below module
must not exceed 60
oC
(140oF).
2.0 (50.8) air gap
on all 4 sides.
30
1
1791-0A32
120V ac OUTPUT
OUT OUT
00
01
02
03
04
05
06
07
10
11
12
13
14
15
16
17
00
01
02
03
04
05
06
07
10
11
12
13
14
15
16
17
GG+1
00
01
02
03
04
05
06
07
10
11
12
13
14
15
16
17
G
(G+1)
00
01
02
03
04
05
06
07
10
11
12
13
14
15
16
17
COMM
STATUS
RACK #
ALLENĆBRADLEY
Dimensions

Installation Instructions
Block I/O
Cat. No. 1791-0A32 Series B
2
Figure 2
Mounting on a DIN Rail
1. Hook top of slot over DIN rail.
2. While pressing block against rail, pull
down on locking levers.
3. When block is flush against rail, push up
on locking levers to secure block to rail.
Locking levers
DIN Rail
A-B Pt. No. 199-DR1
46277-3
EN 50022
(35 x 7.5mm)
Figure 3
Inserting Labels
A set of die-cut labels is supplied with your
module. Select the proper module
designation labels (PLC or SLC) for the front
door and terminal strips.
1. Remove labels from package. Select
correct labels for your application. (PLC
label is numbered 00–07 and 10–17. SLC
is numbered 00–07 and 08–15.)
3. Open clear front door . Insert module
designation label into slots in door .
2.
Remove plastic cover on terminal strip
by flexing in middle. Slip the terminal
designation label with power and RIO
designations into built-in holders in left
terminal strip cover . Flex cover slightly
to install. Repeat for the other
terminal strip using the remaining label.
2
3

Installation Instructions
Block I/O
Cat. No. 1791-0A32 Series B
3
T able A
Acceptable W iring Cables for Block I/O Connection
Use Cable Type
Remote I/O link Belden 9463
Input and output wiring Up to 14AWG (2mm2) stranded with 3/64 inch insulation
Connect wiring as shown in Figure 4 or Figure 5.
Figure 4
Wiring Connections with PLC Family Programmable Controllers (refer
to T able B)
RIO
L2/N L1
1
30
PLC
L1
GND N
NOT
USED NOT
USED
BLU SHD
L1–2
out
00
out 01
out 02
out 03
out 04
out 05
out 06
out 07
out 10
out 12
out 13
out 14
out 15
out 16
out 1
1
out 17
L1–1
CLR
L1–1 connections must be externally connected together to accommodate total amperage.
L1–2 connections must be externally connected together to accommodate total amperage.
L1–3 connections must be externally connected together to accommodate total amperage.
L1–4 connections must be externally connected together to accommodate total amperage.
Output fusing is recommended. Refer to T
able D.
NOT
USED
out 00
out 01
out 02
out 03
out 04
out 05
out 06
out 07
out 10
out 12
out 13
out 14
out 15
out 16
out 1
1
out 17
L2/NL1 L1–3 L1–4
NOT
USED
NOT
USED
NO
CONN
NO
CONN NO
CONN
NO
CONN
NO
CONN
L2/NL1
L2/N L1
L1–1
L1–1
L1–2
L1–2 L1–3
L1–3
L1–4
L1–4
30
1
L2/NL1
1
229 30
12
29
30
NOTE:

Installation Instructions
Block I/O
Cat. No. 1791-0A32 Series B
4
Figure 5
Wiring Connections with SLC Family Processors (refer to Table B)
L2/NL1
RIO
L2/N L1
1
30
S
L
C
L1
GND N
NOT
USED NOT
USED
BLU SHD
out
00
out 01
out 02
out 03
out 04
out 05
out 06
out 07
out 08
out 10
out 1
1
out 12
out 13
out 14
out 09
out 15
L1–1
CLR
NOT
USED
L2/NL1
NOT
USED
NOT
USED
NO
CONN
NO
CONN NO
CONN
NO
CONN
NO
CONN
L2/NL1
L2/N L1
out 00
out 01
out 02
out 03
out 04
out 05
out 06
out 07
out 08
out 10
out 1
1
out 12
out 13
out 14
out 09
out 15
30
1
1
2
29
30
L1–1 connections must be externally connected together to accommodate total amperage.
L1–2 connections must be externally connected together to accommodate total amperage.
L1–3 connections must be externally connected together to accommodate total amperage.
L1–4 connections must be externally connected together to accommodate total amperage.
Output fusing is recommended. Refer to T
able D.
NOTE:
12
29 30
L1–1
L1–1
L1–2
L1–2
L1–2
L1–3
L1–3
L1–3
L1–4
L1–4
L1–4
The block I/O module has an equipment grounding stud on the lower left side of
the module. Connect this grounding stud to your equipment ground. Torque the
nut to 15 in-lbs maximum when connecting to your equipment ground.
ATTENTION: Do not overtighten the nut on the grounding stud
when connecting the wire. Damage to the module could result.
Refer to “Programmable Controller Wiring and Grounding Guidelines”
(1770-4.1) for further information.

Installation Instructions
Block I/O
Cat. No. 1791-0A32 Series B
5
T able B
Wiring Block Designations
nn n
1791–0A32 Series B Connector/Terminal
Co
nn
ectio
n
sDesignation Description Left Conn. Right Conn.
Power
L1 ac hot 1
Power
Connections
Nac neutral 3
Connections
GND Chassis ground 21
Remote I/O
BLU Blue wire – RIO 6
Remote I/O
Connections
CLR Clear wire – RIO 8
Connections
SHD Shield – RIO 7
I/O Connections
PLC: out 00 thru 07
SLC: out 00 thru 07 PLC: Output 00 thru 07 SLC: Output 00 thru 07
16, 18, 20,
22, 24, 26,
28, 30
Output
(G)6
L1–1 L1 output supply 10, 12, 142
Output
(G)6PLC: out 10 thru 17
SLC: out 08 thru 15 PLC: Output 10 thru 17 SLC: Output 08 thru 15
15, 17, 19,
21, 23, 25,
27, 29
L1–2 L1 output supply 9, 11, 133
PLC: out 00 thru 07
SLC: out 00 thru 07 PLC: Output 00 thru 07 SLC: Output 00 thru 07 15, 13, 11, 9, 7, 5, 3, 1
Output
(G + 1)7
L1–3 L1 output supply 21, 19, 174
Output
(G + 1)7PLC: out 10 thru 17
SLC: out 08 thru 15 PLC: Output 10 thru 17 SLC: Output 08 thru 15 16, 14, 12, 10, 8, 6, 4, 2
L1–4 L1 output supply 22, 20, 185
Not used For internal test only;
not for customer use. 4, 5 29, 27, 26
No Conn No internal connection;
customer can use. 30, 28, 25, 24, 23
1
Connect chassis ground to equipment grounding stud. These are not internally connected.
2T
erminals 10, 12 and 14 must be externally connected by customer to accommodate total amperage.
3T
erminals 9, 11 and 13 must be externally connected by customer to accommodate total amperage.
4T
erminals 17, 19 and 21 must be externally connected by customer to accommodate total amperage.
5T
erminals 18, 20 and 22 must be externally connected by customer to accommodate total amperage.
6
OUT (G) = output module group (one word).
7
OUT (G + 1) = output module group plus one word.

SW1
SW2
Open cover to
access switches
1
30
Position = 1Position = 0
End View
1
30
87654321
01
87654321
01
NOTE: Set switch SW2–3 to 0 if this rack
will have a unique address (not
complemented). If this rack address
is a duplicate of another I/O block
or chassis, set the switch to 1 for
primary or 0 for complementary.
Refer to Table C for the
complementary I/O rack address.
Default Switch
Settings = 0
ATTENTION: Cycle power to the module after
setting the switches.
Only block I/O modules with all inputs or all
outputs can use complementary I/O.
Installation Instructions
Block I/O
Cat. No. 1791-0A32 Series B
6
Figure 6
Switch Settings
SW2–8
Not used
SW2–7
Not Used
SW2–6 Last I/O Group
(PLC-2 only)
0Not last rack
1Last rack
SW2–5 Processor
Restart/Lockout (PRL)
0Processor Restart
1Processor Lockout
SW2–4 Hold Last State
0Reset Outputs
1Hold Last State
SW2–3 Complementary I/O1
0Non-Complemented System
0Complementary Rack
1Primary Rack
1See note.
Communication Rate
SW2–2 SW2–1 Bits/s
0 0 57.6 K
0 1 115.2 K
1 0 230.4 K
1 1 230.4 K
Starting Quarter
SW1–2 SW1–1 Module
Group
0 0 0 (1st)
0 1 2 (2nd)
1 0 4 (3rd)
1 1 6 (4th)

Installation Instructions
Block I/O
Cat. No. 1791-0A32 Series B
7
1747-SN
Ra
1771-SN
Ra
PLC–2
Ra
PLC–5
Ra
PLC–5/250
Ra
PLC–3
Ra
SW1 Switch Position
Ra
ck
Number
Ra
ck
Number
Ra
ck
Number
Ra
ck
Number
Ra
ck
Number
Ra
ck
Number 8 7 6 5 4 3
Rack 0 Rack 1 Rack 1 Not V alid Rack 0 Rack 0 0 0 0 0 0 0
Rack 1 Rack 2 Rack 2 Rack 1 Rack 1 Rack 1 0 0 0 0 0 1
Rack 2 Rack 3 Rack 3 Rack 2 Rack 2 Rack 2 0 0 0 0 1 0
Rack 3 Rack 4 Rack 4 Rack 3 Rack 3 Rack 3 0 0 0 0 1 1
Rack 5 Rack 5 Rack 4 Rack 4 Rack 4 0 0 0 1 0 0
Rack 6 Rack 6 Rack 5 Rack 5 Rack 5 0 0 0 1 0 1
Rack 7 Rack 7 Rack 6 Rack 6 Rack 6 0 0 0 1 1 0
Rack 7 Rack 7 Rack 7 0 0 0 1 1 1
Rack 10 Rack 10 Rack 10 0 0 1 0 0 0
Rack 1 1 Rack 1 1 Rack 1 1 0 0 1 0 0 1
Rack 12 Rack 12 Rack 12 0 0 1 0 1 0
Rack 13 Rack 13 Rack 13 0 0 1 0 1 1
Rack 14 Rack 14 Rack 14 0 0 1 1 0 0
Rack 15 Rack 15 Rack 15 0 0 1 1 0 1
Rack 16 Rack 16 Rack 16 0 0 1 1 1 0
Rack 17 Rack 17 Rack 17 0 0 1 1 1 1
Rack 20 Rack 20 Rack 20 0 1 0 0 0 0
Rack 21 Rack 21 Rack 21 0 1 0 0 0 1
Rack 22 Rack 22 Rack 22 0 1 0 0 1 0
Rack 23 Rack 23 Rack 23 0 1 0 0 1 1
Rack 24 Rack 24 Rack 24 0 1 0 1 0 0
Rack 25 Rack 25 Rack 25 0 1 0 1 0 1
Rack 26 Rack 26 Rack 26 0 1 0 1 1 0
Rack 27 Rack 27 Rack 27 0 1 0 1 1 1
Rack 30 Rack 30 0 1 1 0 0 0
Rack 31 Rack 31 0 1 1 0 0 1
Rack 32 Rack 32 0 1 1 0 1 0
Rack 33 Rack 33 0 1 1 0 1 1
Rack 34 Rack 34 0 1 1 1 0 0
Rack 35 Rack 35 0 1 1 1 0 1
Rack 36 Rack 36 0 1 1 1 1 0
Rack 37 Rack 37 0 1 1 1 1 1
Rack 40 1 0 0 0 0 0
Rack 41 1 0 0 0 0 1
Rack 42 1 0 0 0 1 0
Rack 43 1 0 0 0 1 1
Rack 44 1 0 0 1 0 0
Rack 45 1 0 0 1 0 1
Rack 46 1 0 0 1 1 0
Rack 47 1 0 0 1 1 1
Rack 50 1 0 1 0 0 0

When configured as complementary I/O:
PLC-2 can scan racks 01–07
PLC-5/1 1 can scan rack 03
PLC-5/20, PLC-5/30, PLC-5/40, PLC-5/60
can scan racks 01–07
NOTE: Remote rack numbers which can
have a complementary rack are rack
numbers 01 thru 07 only .
Installation Instructions
Block I/O
Cat. No. 1791-0A32 Series B
8
SW1 Switch Position
PLC–3
Rack
Number
PLC–5/250
Rack
Number
PLC–5
Rack
Number
PLC–2
Rack
Number
1771-SN
Rack
Number
1747-SN
Rack
Number 345678
PLC–3
Rack
Number
PLC–5/250
Rack
Number
PLC–5
Rack
Number
PLC–2
Rack
Number
1771-SN
Rack
Number
1747-SN
Rack
Number Rack
51 1 0 1 0 0 1
Rack 52 1 0 1 0 1 0
Rack 53 1 0 1 0 1 1
Rack 54 1 0 1 1 0 0
Rack 55 1 0 1 1 0 1
Rack 56 1 0 1 1 1 0
Rack 57 1 0 1 1 1 1
Rack 60 1 1 0 0 0 0
Rack 61 1 1 0 0 0 1
Rack 62 1 1 0 0 1 0
Rack 63 1 1 0 0 1 1
Rack 64 1 1 0 1 0 0
Rack 65 1 1 0 1 0 1
Rack 66 1 1 0 1 1 0
Rack 67 1 1 0 1 1 1
Rack 70 1 1 1 0 0 0
Rack 71 1 1 1 0 0 1
Rack 72 1 1 1 0 1 0
Rack 73 1 1 1 0 1 1
Rack 74 1 1 1 1 0 0
Rack 75 1 1 1 1 0 1
Rack 76 1 1 1 1 1 0
Not V alid 1 1 1 1 1 1
Rack address 77 is an illegal configuration.
PLC-5/1 1 processors can scan rack 03.
PLC-5/15 and PLC-5/20 processors can scan racks 01–03.
PLC-5/25 and PLC-5/30 processors can scan racks 01–07.
PLC-5/40 and PLC-5/40L processors can scan racks 01–17.
PLC-5/60 and PLC-5/60L processors can scan racks 01–27.
PLC-5/250 processors can scan racks 00–37.
T able C
PLC–2 and PLC–5 With Complementary I/O
PLC–2
Ra
PLC–5
Ra
SW1 Switch Position
Ra
ck
Number
Ra
ck
Number 8 7 6 5 4 3
Rack 1 Not V alid 0 0 1 0 0 0
Rack 2 Rack 1 0 0 1 0 0 1
Rack 3 Rack 2 0 0 1 0 1 0
Rack 4 Rack 3 0 0 1 0 1 1
Rack 5 Rack 4 0 0 1 1 0 0
Rack 6 Rack 5 0 0 1 1 0 1
Rack 7 Rack 6 0 0 1 1 1 0
Rack 7 0 0 1 1 1 1

Installation Instructions
Block I/O
Cat. No. 1791-0A32 Series B
9
The SLC 500 controllers communicate with the block I/O using an I/O Scanner
module (cat. no. 1747-SN series A). Refer to the user manual for the 1747-SN/A
Scanner module for more information.
Important: This block I/O module is not compatible with the 1747-DSN
Distributed I/O Scanner module.
Termination Resistor
A termination resistor must be installed on the last block in a series. Connect the
resistor as shown in Figure 7.
Figure 7
Installing the T ermination Resistor
Termination
Resistor
Connect
termination resistor across
terminals 6 (BLU) and 8 (CLR).
10835–I
BLU SHD
CLR
150 ohm – 57.6K and 115.2K baud
82 ohm – 230.4K baud
ATTENTION: Devices that are operating at 230.4K baud must have
82 ohm terminators in place for proper operation.

Installation Instructions
Block I/O
Cat. No. 1791-0A32 Series B
10
Indicators
OUTOUT
00
01
02
03
04
05
06
07
10
11
12
13
14
15
16
17
COMM
STATUS
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
PLC SLC
COMM
STATUS
00
01
02
03
04
05
06
07
10
11
12
13
14
15
16
17
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
G G+1 OUTOUT
G G+1
Indicator Description
COMM OFF
ON
Flashing
Communication not established
Communication established
Processor in Program mode
STATUS OFF
ON
Flashing
Normal
Error (hardware or software), block power low
COMM F AIL – communication cable disconnected, 100ms between valid frames, no
more than 255 valid frames between valid frames addressed to block, 20ms idle
time exceeded.
COMM and ST A TUS will alternately flash when processor restart lockout is selected, a fault has occurred and the processor
is communicating with the block.
Fusing
The block I/O module is internally fused to protect the module. No external
power fusing is required.
The outputs of the block I/O modules are not fused. Fusing of outputs is
recommended. If desired to fuse an output, you must provide external fusing.
T able D
Recommended Fuses
Type of
Circuit Part Number1Size Rating in Amps Maximum Surge Current2
(repeatable every 2s)
ac
SAN-O SS2-1.0 0.25 in. x 1.25 in. 1.0A 3.0A for 50ms
ac
SAN-O MQ2-1.0 5mm x 20mm 1.0A 2.5A for 50ms
1Note:
Do not substitute another fuse for those listed.
2The
recommended fuses will withstand surges of the above listed currents for the time specified.
.