Allen-Bradley B Series Installation Instructions Manual
Allen-Bradley B Series:
The Allen-Bradley B Series AC (12–120V) Output Module is a versatile and reliable solution for controlling various industrial automation applications. With its ability to handle up to 16 individual outputs, this module offers precise control and monitoring capabilities. The module's compatibility with PLC-5 systems and its ability to function as a 16-point output module using both output and input image data tables make it a versatile choice for complex automation tasks.
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AC (12-120V) Output Module
Cat. No. 1771-OAD Series B
Installation Instructions
To The Installer
Pre-installation Considerations
This document provides information on: important pre-installation considerations power supply requirements installing the module using the indicators for troubleshooting replacing the fuse module specifications
The 1771-OAD Series B module is compatible with all chassis except
1771-A1, 1771-A2 and 1771-A4 chassis. Make sure no other output module or single card block transfer module is placed in the same module group when using 2-slot addressing. Any discrete input module may be used within the same module group.
Power Requirements
Your module receives its power through the 1771 I/O chassis backplane from the chassis power supply. The module requires 295mA from the output of this supply. Add this to the requirements of all other modules in the I/O chassis to prevent overloading the chassis backplane and/or chassis power supply.
Initial Handling
The ac output module is shipped in a static-shielded bag to guard against electrostatic discharge damage. Observe the following precautions when handling the module.
Electrostatic Discharge Damage
ATTENTION: Under some conditions, electrostatic discharge can degrade performance or damage the module. Observe the following precautions to guard against electrostatic damage.
Wear an approved wrist strap grounding device, or touch a grounded object to discharge yourself before handling the module.
Do not touch the backplane connector or connector pins.
2
Installation Instructions
AC (12–120V) Output Module
Cat. No. 1771-OAD Series B
Installing Your Module
If you configure or replace internal components, do not touch other circuit components inside the module. If available, use a static-free work station.
When not in use, keep the module in its static-shielded bag.
In this section we tell you how to: change the mode of the fuse-blown jumper key your I/O chassis install your module make your wiring connections
Changing the Mode of the Fuse-blown Jumper
The fuse-blown jumper has two modes: the preset, standard (STD) mode – displays the fuse status on the red fuse-blown status indicator the customer side indication (CSI) mode – displays the fuse status in the input image table and on the red fuse-blown status indicator. This mode configures the module as a 16 point output module that utilizes
both the output and input image data tables of your controller.
When a fuse blows, all 16 bits in the associated input image table will turn on (1).
For example, if you install the module in a PLC-5 system and address the module as O:012, then the fuse status bits are in I:012.
To monitor the status of the module fuse, make certain that your user program monitors the module’s input image table for ‘‘on” bits.
Important: Do not put the module jumper in CSI mode when you use this module in a complementary mode. Your system will not operate properly.
To change the fuse blown jumper to the CSI mode, do the following:
1.
Locate the fuse-blown jumper at the top-right edge of the module circuit board, as shown in the following figure.
2.
Use your finger to slide the jumper off the STD position (the middle post and the left post).
3.
Carefully reposition the jumper by sliding it onto the CSI position (the middle post and the right post).
Top-right edge of circuit board
Fuse Blown Jumper
(shown in preset
STD position)
STD CSI
12636-I
Installation Instructions
AC (12–120V) Output Module
Cat. No. 1771-OAD Series B
Keying Your I/O Chassis
Use the plastic keying bands, shipped with each I/O chassis, to key the I/O slots to accept only this type of module.
The module circuit board is slotted in two places on the rear edge. The position of the keying bands on the backplane connector must correspond to these slots to allow insertion of the module. You can key any connector in an
I/O chassis to receive this module except for the left-most connector reserved for adapter or processor modules. Place keying bands between the following numbers labeled on the backplane connector:
Between 10 and 12
Between 20 and 22
You can change the position of these keys if system redesign and rewiring makes insertion of a different module necessary.
Installing the Output Module
To install the ac output module in your 1771 I/O chassis, follow the steps listed below.
ATTENTION: Remove power from the 1771 I/O chassis backplane and field wiring arm before removing or installing an
I/O module.
Failure to remove power from the backplane or field wiring arm could cause module damage, degradation of performance, or injury.
Failure to remove power from the backplane could cause injury or equipment damage due to possible unexpected operation.
1.
Turn off power to the I/O chassis.
2.
Place the printed circuit board on the rear module in the plastic tracks at the top and bottom of the slot that guide the module into position.
3.
Do not force the module into its backplane connector. Apply firm, even pressure on the module to seat it properly.
4.
Snap the chassis latch over the top of the module to secure its position.
5.
Connect the field wiring arm to the module.
6.
Make wiring connections to the field wiring arm as indicated in Figure 1.
3
4
Installation Instructions
AC (12–120V) Output Module
Cat. No. 1771-OAD Series B
Connecting Wiring to the Output Module
Connections to the output module are made to the field wiring arm (cat. no.
1771-WH) shipped with the module. An optional fused field wiring arm is available (cat. no. 1771-WHF) which provides individual fusing for each circuit. Attach the field wiring arm to the pivot bar on the bottom of the I/O chassis. The field wiring arm pivots upward and connects with the module so you can install or remove the module without disconnecting the wires.
Refer to Figure 1. You must supply ac (L1) at terminals A through D on the field wiring arm. You need four ac connections to accommodate the total required surge rating on the module without overstressing any single connection on the field wiring arm. Jumper all ac (L1) connections together to prevent module damage.
Figure 1
Connection Diagram
L1 ac High
L1
L1
L1
L1
Output 00
Output 01
Output 02
Output 03
Output 04
Output 05
Output 06
Output 07
Output 10
Output 11
Output 12
Output 13
Output 14
Output 15
Output 16
Output 17
L2/optional
Field Wiring Arm
Cat. No. 1771-WH
(Actual wiring runs in this direction.)
10
11
12
13
14
04
05
06
07
15
16
17
E
C
D
00
A
B
01
02
03
Output
Device
L2 ac Low
12223–I
ac (12-120V)
Output Module
(Cat. No. 1771-OAD)
L1
120V ac High
Installation Instructions
AC (12–120V) Output Module
Cat. No. 1771-OAD Series B
Important: You can use an AC (120V) Output Module (cat. no.
1771-OAD) to directly drive terminals on an AC/DC (120V) Input Module
(cat. no. 1771-IAD) (Figure 2).
Figure 2
Driving an Input Module with an Output Module ac/dc (120V)
Input Module
(Cat. No. 1771-IAD) ac (12-120V)
Output Module
(Cat. No. 1771-OAD) ac/dc (120V)
Input Module
(Cat. No. 1771-IA)
L1
120V ac High
L2 ac Low
L1
2500 ohm 10W resistor
L2 ac Low
12224–I
You can also use a 1771-OAD Output module to drive an AC/DC (120V)
Input Module (cat. no. 1771-IA) but you must connect one of the following between the output terminal and L2 (common) as shown in Figure 2.
2500 ohm, 10W resistor
RG-1676-1 Electrocube (San Gabriel, California)
Use the same ac power source to power both modules to ensure proper phasing and prevent module damage.
5
Installation Instructions
AC (12–120V) Output Module
Cat. No. 1771-OAD Series B
Interpreting the Status
Indicators
The front panel has one green module active indicator, 16 red status indicators, and one red fuse-blown indicator (Figure 3).
The green module active indicator lights when: the rack power supply has properly established 5V dc, and the processor is placed in run mode
When the module is in the CSI mode, the green module active indicator lights only when the rack power supply has properly established 5V dc.
To properly interpret the red status indicators, the module active indicator must be lit.
The status indicators are provided for system logic side indication of individual outputs. When a status indicator lights, voltage is present at the output terminal.
The fuse-blown indicator lights when the fuse has blown or been cleared.
Figure 3
Status Indicators
6
Replacing the Fuse
Module Active Indicator (green)
ACTIVE
00
01
10
11
02
03
04
12
13
14
05
06
07
15
16
17
FUSE
00 to 17 Status Indicators (red)
Fuse Blown Indicator (red)
12225–I
The module’s output circuitry is protected from overload or shorts by a fuse.
You can replace the fuse as outlined below.
1.
Turn off all power to the I/O chassis and all output device power to the field wiring arm.
ATTENTION: Remove power from the 1771 I/O chassis backplane and wiring arm before removing or installing the module.
Failure to remove power from the backplane or field wiring arm could cause module damage, degradation of performance, or injury.
Failure to remove power from the backplane could cause injury or equipment damage due to possible unexpected operation.
Installation Instructions
AC (12–120V) Output Module
Cat. No. 1771-OAD Series B
2.
Remove the module from the chassis and replace the blown fuse with a
10A, 250V rectifier fuse (1/4 x 1-1/4 inch), Littelfuse part number
322010.
3.
Replace the module in the chassis and attach the field wiring arm.
4.
Turn OFF all outputs to the module.
5.
Turn ON power to the I/O chassis only.
6.
Check that the red status indicators on the front of the module
(Figure 3) are off (no outputs on).
7.
Turn on output device power to the field wiring arm.
8.
Start with bit 00 and turn on individual outputs one at a time. Turn off the previous output before turning on the next output.
9.
If the red fuse blown indicator turns on, note which output is faulty and trace the output wiring to the faulty device.
After correcting the fault problem, return to step 1 and begin again. If you cannot locate a faulty output, return to step 8 and turn on 2 or more outputs at the same time. Total output current should not exceed 2A per output, or
8A total per module.
Troubleshooting
Indicator Status
Module active ON (green)
Module active ON (green) and
Output status ON (red)
Module active ON (green) and
Output status OFF
Module active OFF and
Output status ON (red) or OFF
Fuse blown (red)
Use this table to help you interpret the 1771-OAD status indicators and to troubleshoot module and system faults.
Description of Fault or System Status
Normal Indication.
Check voltage at output point on swing arm.
No voltage.
Voltage on terminal.
1. Processor is in program mode.
2. Module not functioning properly.
Outputs will not turn on.
Action to Take
None.
If voltage is present, take no action. If no voltage is present, check the fuse. If the fuse is OK, replace the module.
None.
Replace the module.
1. If module is in normal mode, take no action. If module is in CSI mode replace module.
2. Check the chassis power supply and processor. If they are OK, replace the module.
Replace the fuse. If fuse replacement does not correct the problem, replace the module.
7
Installation Instructions
AC (12–120V) Output Module
Cat. No. 1771-OAD Series B
Specifications
Outputs per Module
Module Location
Output Voltage Range
Output Current Rating
Surge Current (maximum)
Minimum Load Current
On State Voltage Drop (max.)
Off State Leakage Current (max.)
Signal Delay (max.) Off to On
On to Off
Power Dissipation
Thermal Dissipation
Backplane Current
Isolation Voltage
Environmental Conditions
Operational Temperature
Storage Temperature
Relative Humidity
Conductors Wire Size
16
1771-A1B through -A4B or later I/O chassis, 1771-AM1, -AM2 chassis
10 to 138V ac @ 47 - 63Hz
2A per output – not to exceed 8A per module
25A per output for 100ms, repeatable every 1 second
25A per module for 100ms, repeatable every 1 second
5mA per output
1.5V at load current > 50mA
5.8V at load current < 50mA
3.0mA per output @ 138V ac
Zero crossing 8.3ms @ 60Hz, 10.0ms @ 50Hz
Zero crossing 8.3ms @ 60Hz, 10.0ms @ 50Hz
13 Watts (max.), 1.5 Watts (min.)
48.0 BTU/hr (max.), 5.13 BTU/hr (min.)
295mA
Tested at 2500V dc for 1 second per UL508 & CSA C22.2 #142
Category
0 o to 60 o C (32 o to 140 o F)
–40 o to 85 o C (–40 o to 185 o F)
5 to 95% (without condensation)
14 gauge stranded maximum
3/64 inch insulation maximum
1 1
Keying
Fuse
Field Wiring Arm Standard
Optional
Wiring Arm Screw Torque
Between 10 and 12
Between 20 and 22
10A, 250V rectifier fuse (1/4 x 1-1/4 inch), Littelfuse PN 322010
Catalog Number 1771-WH
Catalog Number 1771-WHF (fused)
7-9 inch-pounds
Relay Compatibility 700–HC14A1 700–HC14A1–4 700–HT12AA1 700–HF32A1 700–HTM12RA1
700–HP32A1–4 700–HB32A1 700–CL110A1 700–R110A1 100–A09
100–A30 100–A18 700–RT10N100A1 700–CL220A1 700–C110A1
1
You use this conductor-category information for planning conductor routing as described in the system-level installation manual.
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Supersedes Publication 1771-2.74 April 1992
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