Rockwell Automation Allen-Bradley SLC 500 User manual

Publication 1746-IN026A-EN-P - July 2003
Installation Instructions
SLC 500 8-Point Analog Output Module
(Catalog Numbers 1746-NO8I and 1746-NO8V)
Inside…............................................................................................page
Important User Information .................................................................... 2
For More Information.............................................................................. 3
Hazardous Location Considerations ....................................................... 4
Environnements dangereux .................................................................... 4
Hardware Features ................................................................................. 5
Determining Power Requirements.......................................................... 6
Using an External 24V dc Power Supply (optional) ................................ 6
Installation .............................................................................................. 8
Wiring ................................................................................................... 11
Configuration ........................................................................................ 14
Specifications ....................................................................................... 16
Rockwell Automation Support................................................. Back Cover

2SLC 500 8-Point Analog Output Module
Publication 1746-IN026A-EN-P - July 2003
Important User Information
Because of the variety of uses for the products described in this publication, those responsible for the
application and use of these products must satisfy themselves that all necessary steps have been taken to
assure that each application and use meets all performance and safety requirements, including any applicable
laws, regulations, codes and standards. In no event will Rockwell Automation be responsible or liable for
indirect or consequential damage resulting from the use or application of these products.
Any illustrations, charts, sample programs, and layout examples shown in this publication are intended solely
for purposes of example. Since there are many variables and requirements associated with any particular
installation, Rockwell Automation does not assume responsibility or liability (to include intellectual property
liability) for actual use based upon the examples shown in this publication.
Allen-Bradley publication SGI-1.1, Safety Guidelines for the Application, Installation and Maintenance of
Solid-State Control (available from your local Rockwell Automation office), describes some important
differences between solid-state equipment and electromechanical devices that should be taken into
consideration when applying products such as those described in this publication.
Reproduction of the contents of this copyrighted publication, in whole or part, without written permission of
Rockwell Automation, is prohibited.
Throughout this publication, notes may be used to make you aware of safety considerations. The following
annotations and their accompanying statements help you to identify a potential hazard, avoid a potential
hazard, and recognize the consequences of a potential hazard:
!
WARNING
Identifies information about practices or circumstances that can cause an explosion in a
hazardous environment, which may lead to personal injury or death, property damage,
or economic loss.
ATTENTION
!
Identifies information about practices or circumstances that can lead to personal injury
or death, property damage, or economic loss.
IMPORTANT Identifies information that is critical for successful application and understanding of the
product.

SLC 500 8-Point Analog Output Module 3
Publication 1746-IN026A-EN-P - July 2003
For More Information
Related Publications
How to Get More Information
If you would like a manual, you can:
•download a free electronic version from the internet at
www.theautomationbookstore.com
•purchase a printed manual by:
–contacting your local distributor or Rockwell Automation representative
–visiting www.theautomationbookstore.com and placing your order
–calling 1.800.963.9548 (USA/Canada) or 001.330.725.1547 (Outside
USA/Canada)
Table 1 List of Related Publications for 1746-NO8I and 1746-NO8V Modules
For Refer to this Document Pub. No.
A more detailed description on how to install and
use your 1746-NO8 module.
SLC 500 8-Point Analog Output
Module User Manual
1746-UM026
A more detailed description on how to install and
use your modular SLC 500 system.
SLC 500 Modular Hardware Style User
Manual
1747-UM011
A more detailed description on how to install and
use your fixed SLC 500 system.
SLC 500 Fixed Hardware Style
Installation and Operation Manual
1747-6.21
A reference manual that contains status file data,
instruction set, and troubleshooting information.
SLC 500 Instruction Set Reference
Manual
1747-RM001

4SLC 500 8-Point Analog Output Module
Publication 1746-IN026A-EN-P - July 2003
Hazardous Location Considerations
This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or
non-hazardous locations only. The following WARNING statement applies to use in
hazardous locations.
Environnements dangereux
Cet équipement est conçu pour être utilisé dans des environnements de Classe 1,
Division 2, Groupes A, B, C, D ou non dangereux. La mise en garde suivante
s’applique à une utilisation dans des environnements dangereux.
!
WARNING EXPLOSION HAZARD
•Substitution of components may impair suitability for Class
I, Division 2.
•Do not replace components or disconnect equipment
unless power has been switched off.
•Do not connect or disconnect components unless power
has been switched off.
•All wiring must comply with N.E.C. article 501-4(b).
!
AVERTISSEMENT DANGER D’EXPLOSION
•La substitution de composants peut rendre cet équipement
impropre à une utilisation en environnement de Classe 1,
Division 2.
•Ne pas remplacer de composants ou déconnecter
l'équipement sans s'être assuré que l'alimentation est
coupée.
•Ne pas connecter ou déconnecter des composants sans
s'être assuré que l'alimentation est coupée.

SLC 500 8-Point Analog Output Module 5
Publication 1746-IN026A-EN-P - July 2003
Hardware Features
The module contains a removable terminal block, providing connection for 8
analog output channels, which are specifically designed to interface with analog
current and voltage devices. The 1746-NO8I provides eight channels of current
outputs, while the 1746-NO8V provides eight channels of voltage outputs. There
are no input channels on the module.
The module is configured via the programming software. There are no DIP
switches.
A jumper, J4, is used to select whether the 24V dc power is provided by the SLC
backplane or an optional 24V dc external power supply.
The following illustration displays the main hardware features.
Table 2 1746-NO8 Hardware Features
Hardware Feature Function
Channel Status LED Indicators Displays channel operating and fault status.
Module Status LED Displays module operating and fault status.
Side Label (Nameplate) Provides module information.
Removable Terminal Block Provides physical connection to input devices.
Door Label Permits easy terminal identification.
Cable Tie Slots Secures and routes wiring from the module.
Self-Locking Tabs Secures module in the chassis slot.
J4 Jumper Selects 24V dc power source.
Nameplate Provides module information such as catalog number, backplane
requirements, and output ranges.
I OUT 0
CHANNEL
STATUS
MODULE
ANALOG
OUTPUT
I OUT 1
I OUT 2
I OUT 3
I OUT 4
I OUT 5
I OUT 6
I OUT 7
+24
VDC
ANL
COM 0
ANL
COM 1
ANL
COM 2
ANL
COM 3
ANL
COM 4
ANL
COM 5
ANL
COM 6
ANL
COM 7
DC
COM
RACK
EXT
123
Channel Status
LEDs (Green)
Module Status
LED (Green)
Removable
Terminal Block
Door Label
Cable Tie Slots
J4 Jumper
Self-locking Tabs
Nameplate

6SLC 500 8-Point Analog Output Module
Publication 1746-IN026A-EN-P - July 2003
Determining Power Requirements
The module receives its power through the SLC 500 chassis backplane from the
+5V dc/+24V dc chassis power supply. The +5V dc backplane supply powers the
SLC circuitry, and the +24V dc backplane supply powers the module analog
circuitry. The maximum current drawn by the module is shown in the table below.
Add the values shown in the table above to the requirements of all other modules
in the SLC chassis to prevent overloading the chassis power supply. Refer to your
controller’s User Manual for power supply loading calculations and worksheets.
Using an External 24V dc Power Supply (optional)
The jumper, J4, is located in the bottom right corner of the module’s circuit board
next to the power supply.
Table 3 1746-NO8 Backplane Current Consumption
Specification 1746-NO8I 1746-NO8V
Backplane Current Consumption (maximum) 120 mA at 5V dc
250 mA at 24V dc
120 mA at 5V dc
160 mA at 24V dc
Backplane Current Consumption (maximum)
when Using External 24V dc Power Supply(1)
(1) The 1746-NO8I and 1746-NO8V output modules can use an external 24V dc power supply to reduce backplane loading. To
use an external 24V dc power supply, you must set your module’s jumper J4 as indicated in the following section. To comply
with the U.L. regulation, the external power supply must be rated N.E.C. Class 2. Do not use the 24V dc user power terminal
on the chassis power supply to power the analog output module.
NOTE: The external 24V dc power supply terminal block ground connection (DC COM) is connected to the SLC power supply
ground.
120 mA at 5V dc
0 mA at 24V dc
120 mA at 5V dc
0 mA at 24V dc
RACK
EXT
123
J4 jumper location

SLC 500 8-Point Analog Output Module 7
Publication 1746-IN026A-EN-P - July 2003
•With the jumper in the 1-2 shorted position, the module draws all of its
power from the backplane of the SLC system.
•With the jumper in the 2-3 shorted position, the module draws its 24V dc
power from the external power supply; however, the module still draws its
5V dc power from the backplane.
Important Notes about Using an External 24V dc Power Supply
ATTENTION
!
Before setting the jumper, all system power must be turned
off. This includes the chassis power as well as any external
24V dc power supply.
IMPORTANT If the module is configured to use an external 24V dc power
supply, the supply must be turned on for the module to
operate. If the external 24V dc power supply is turned off, the
module’s outputs will be turned off, and the module’s
processor will be reset until power is restored.
The module’s LEDs will flash the 24V Power Fail blink code.
See the troubleshooting section of the SLC 500 8-Point Analog
Output Modules User Manual, publication 1746-UM026 for
more information.
IMPORTANT Do not use the 24V dc user power terminal on the chassis
power supply to power the analog output module.
RACK
123
EXT RACK
123
EXT
Module draws power
from SLC backplane
(factory setting)
Module draws 24V dc
power from external supply

8SLC 500 8-Point Analog Output Module
Publication 1746-IN026A-EN-P - July 2003
Installation
Install the SLC 500 system in a properly rated (i.e., NEMA) enclosure. Make sure
that the SLC 500 system is properly grounded.
Choosing a Slot in the Chassis
Two factors determine where the analog module should be located in the chassis:
ambient temperature and electrical noise. Consider the following conditions when
selecting a slot for an analog module. Position the module:
•in a slot away from an ac or high voltage dc modules
•in the chassis closest to the bottom of the enclosure where the SLC 500
system is installed
•away from the chassis power supply if installed in a modular system
Prevent Electrostatic Discharge
TIP To use the advanced features of Class 3 operation, an SLC 5/02
or higher processor must be used, and the module must be
located in the local chassis or in a remote ControlNet chassis
with a 1747-ACN(R)15 adapter.
If the module is located in remote I/O chassis with a 1747-ASB
adapter, it will operate in Class 1 mode, and you must use
block transfer for configuration and data retrieval.
TIP Remember that, in a modular system, a processor or adapter
always occupies the first slot of the chassis.
ATTENTION
!
Electrostatic discharge can damage integrated circuits or
semiconductors if you touch bus connector pins. Follow these
guidelines when you handle the module:
•Touch a grounded object to discharge static potential.
•Wear an approved wrist-strap grounding device.
•Do not touch the bus connector or connector pins.
•Do not touch circuit components inside the module.
•If available, use a static-safe work station.
•When not in use, keep the module in its static-shield box.

SLC 500 8-Point Analog Output Module 9
Publication 1746-IN026A-EN-P - July 2003
Remove Power
Terminal Block Removal
When installing the module in a chassis, it is not necessary to remove the terminal
block from the module. However, if the terminal block is removed, use the write-on
label located on the side of the terminal block to identify the module location and
type.
To remove the terminal block:
1. Loosen the two terminal block release screws.
2. Grasp the terminal block at the top and bottom and pull outward and down.
ATTENTION
!
Remove power before removing or installing this module.
When you remove or install a module with power applied, an
electrical arc may occur. An electrical arc can cause personal
injury or property damage by:
•sending an erroneous signal to your system’s field devices,
causing unintended machine motion
•causing an explosion in a hazardous environment
•causing permanent damage to the module’s circuitry
Electrical arcing causes excessive wear to contacts on both the
module and its mating connector. Worn contacts may create
electrical resistance.
Terminal Block
Release Screws
•
SLOT RACK
MODULE

10 SLC 500 8-Point Analog Output Module
Publication 1746-IN026A-EN-P - July 2003
Module Installation and Removal
The module fits into any slot, except the processor slot (0), in either an SLC 500
modular system or an SLC 500 fixed system expansion chassis (1746-A2).
1. Align the circuit board of the analog module with the card guide of the
chassis as shown below.
2. Slide the module in until both top and bottom retaining clips are secured.
To remove the module, depress the retaining clips at the top and bottom of the
module and slide the module out of the chassis slot. Cover all unused slots with the
Card Slot Filler, catalog number 1746-N2.
Top and Bottom
Module Release (s)
Card Guide