Allen-Bradley POINT I/O 1734-VHSC5 User manual

Installation Instructions
POINT I/O 5V DC and 24V DC Very High
Speed Counter Module
Catalog Numbers 1734-VHSC5, 1734-VHSC24,1734-VHSC24K,
Series C
Catalog numbers with the suffix ‘K’ are conformal coated and their specifications are the
same as non-conformal coated catalogs.
Table of Contents
Topic Page
Important User Information 2
Environment and Enclosure 3
Prevent Electrostatic Discharge 3
North American Hazardous Location Approval 4
European Hazardous Location Approval 5
Additional Resources 7
Before You Begin 7
Install the Mounting Base 9
Install the Module 10
Install the Removable Terminal Block 12
Remove a Mounting Base 14
Wire the Module 15
Communicate with the Module 16
Interpret Status Indicators 22
Specifications 24

2POINT I/O 5V DC and 24V DC Very High Speed Counter Module
Publication 1734-IN003H-EN-E - December 2018
Important User Information
Solid-state equipment has operational characteristics differing from those of electromechanical
equipment. Safety Guidelines for the Application, Installation, and Maintenance of Solid-State Controls
(Publication SGI-1.1 available from your local Rockwell Automation sales office or online at
http://www.rockwellautomation.com/literature/) describes some important differences between
solid-state equipment and hard-wired electromechanical devices. Because of this difference, and also
because of the wide variety of uses for solid-state equipment, all persons responsible for applying this
equipment must satisfy themselves that each intended application of this equipment is acceptable.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages
resulting from the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the
many variables and requirements associated with any particular installation, Rockwell Automation, Inc.
cannot assume responsibility or liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits,
equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell
Automation, Inc., is prohibited.
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
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. Attentions help you
identify a hazard, avoid a hazard and recognize the consequences.
SHOCK HAZARD: Labels may be on or inside the equipment (for example, drive or
motor) to alert people that dangerous voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment (for example, drive or
motor) to alert people that surfaces may reach dangerous temperatures.
IMPORTANT Identifies information that is critical for successful application and understanding of
the product.

POINT I/O 5V DC and 24V DC Very High Speed Counter Module 3
Publication 1734-IN003H-EN-E - December 2018
Environment and Enclosure
Prevent Electrostatic Discharge
ATTENTION: This equipment is intended for use in a Pollution Degree 2
industrial environment, in overvoltage Category II applications (as defined in
EN/IEC 60664-1), at altitudes up to 2000 m (6562 ft) without derating.
This equipment is not intended for use in residential environments and may not
provide adequate protection to radio communication services in such
environments.
This equipment is supplied as open-type equipment for indoor use. It must be
mounted within an enclosure that is suitably designed for those specific
environmental conditions that will be present and appropriately designed to
prevent personal injury resulting from accessibility to live parts. The enclosure
must have suitable flame-retardant properties to prevent or minimize the spread
of flame, complying with a flame spread rating of 5VA or be approved for the
application if nonmetallic. The interior of the enclosure must be accessible only
by the use of a tool. Subsequent sections of this publication may contain more
information regarding specific enclosure type ratings that are required to
comply with certain product safety certifications.
In addition to this publication, see the following:
• Industrial Automation Wiring and Grounding Guidelines, publication
1770-4.1, for more installation requirements.
• NEMA Standard 250 and EN/IEC 60529, as applicable, for explanations of
the degrees of protection provided by enclosures.
ATTENTION: This equipment is sensitive to electrostatic discharge, which can
cause internal damage and affect normal operation. Follow these guidelines
when you handle this equipment:
• Touch a grounded object to discharge potential static.
• Wear an approved grounding wriststrap.
• Do not touch connectors or pins on component boards.
• Do not touch circuit components inside the equipment.
• Use a static-safe workstation, if available.
• Store the equipment in appropriate static-safe packaging when not in use.

4POINT I/O 5V DC and 24V DC Very High Speed Counter Module
Publication 1734-IN003H-EN-E - December 2018
North American Hazardous Location Approval
The following information applies when
operating this equipment in hazardous
locations:
Informations sur l'utilisation de cet équipement
en environnements dangereux:
Products marked "CL I, DIV 2, GP A, B, C, D" are suitable
for use in Class I Division 2 Groups A, B, C, D, Hazardous
Locations and nonhazardous locations only. Each product
is supplied with markings on the rating nameplate
indicating the hazardous location temperature code.
When combining products within a system, the most
adverse temperature code (lowest "T" number) may be
used to help determine the overall temperature code of
the system. Combinations of equipment in your system
are subject to investigation by the local Authority Having
Jurisdiction at the time of installation.
Les produits marqués "CL I, DIV 2, GP A, B, C, D" ne conviennent
qu'à une utilisation en environnements de Classe I Division 2
Groupes A, B, C, D dangereux et non dangereux. Chaque produit
est livré avec des marquages sur sa plaque d'identification qui
indiquent le code de température pour les environnements
dangereux. Lorsque plusieurs produits sont combinés dans un
système, le code de température le plus défavorable (code de
température le plus faible) peut être utilisé pour déterminer le
code de température global du système. Les combinaisons
d'équipements dans le système sont sujettes à inspection par
les autorités locales qualifiées au moment de l'installation.
EXPLOSION HAZARD
• Do not disconnect equipment unless
power has been removed or the area is
known to be nonhazardous.
• Do not disconnect connections to this
equipment unless power has been
removed or the area is known to be
nonhazardous. Secure any external
connections that mate to this equipment
by using screws, sliding latches,
threaded connectors, or other means
provided with this product.
• Substitution of components may impair
suitability for Class I, Division 2.
RISQUE D’EXPLOSION
• Couper le courant ou s'assurer que
l'environnement est classé non dangereux
avant de débrancher l'équipement.
• Couper le courant ou s'assurer que
l'environnement est classé non dangereux
avant de débrancher les connecteurs. Fixer
tous les connecteurs externes reliés à cet
équipement à l'aide de vis, loquets
coulissants, connecteurs filetés ou autres
moyens fournis avec ce produit.
• La substitution de composants peut rendre cet
équipement inadapté à une utilisation en
environnement de Classe I, Division 2.

POINT I/O 5V DC and 24V DC Very High Speed Counter Module 5
Publication 1734-IN003H-EN-E - December 2018
European Hazardous Location Approval
The following applies to products marked II 3 G:
• Are intended for use in potentially explosive atmospheres as defined by European
Union Directive 2014/34/EU and has been found to comply with the Essential Health
and Safety Requirements relating to the design and construction of Category 3
equipment intended for use in Zone 2 potentially explosive atmospheres, given in
Annex II to this Directive.
• Compliance with the Essential Health and Safety Requirements has been assured by
compliance with EN 60079-15 and EN 60079-0.
• Are Equipment Group II, Equipment Category 3, and comply with the Essential Health
and Safety Requirements relating to the design and construction of such equipment
given in Annex II to EU Directive 2014/34/EU. See the EU Declaration of Conformity at
http://www.rockwellautomation.com/global/certification/overview.page for details.
• The type of protection is Ex nA IIC T4 Gc according to EN 60079-15.
• Comply to Standards EN 60079-0:2012+A11:2013, EN 60079-15:2010, reference
certificate number DEMKO 04 ATEX 0330347X.
• Are intended for use in areas in which explosive atmospheres caused by gases,
vapors, mists, or air are unlikely to occur, or are likely to occur only infrequently and
for short periods. Such locations correspond to Zone 2 classification according to
ATEX directive 2014/34/EU.
• May have catalog numbers followed by a “K” to indicate a conformal coating option.
WARNING: Special Conditions for Safe Use:
• This equipment is not resistant to sunlight or other sources of UV radiation.
• This equipment shall be mounted in an ATEX/IECEx Zone 2 certified
enclosure with a minimum ingress protection rating of at least IP54 (in
accordance with EN/IEC 60079-15) and used in an environment of not more
than Pollution Degree 2 (as defined in EN/IEC 60664-1) when applied in
Zone 2 environments. The enclosure must be accessible only by the use of
a tool.
• This equipment shall be used within its specified ratings that are defined by
Rockwell Automation.
• Provision shall be made to prevent the rated voltage from being exceeded
by transient disturbances of more than 140% of the peak rated voltage
when applied in Zone 2 environments.
• The instructions in the user manual shall be observed.
• This equipment must be used only with ATEX certified Rockwell
Automation backplanes.
• Earthing is accomplished through mounting of modules on rail.
• Devices shall be used in an environment of not more than Pollution
Degree 2.

6POINT I/O 5V DC and 24V DC Very High Speed Counter Module
Publication 1734-IN003H-EN-E - December 2018
ATTENTION: If this equipment is used in a manner not specified by the
manufacturer, the protection provided by the equipment may be impaired.
ATTENTION: Read this document and the documents listed in the Additional
Resources section about installation, configuration, and operation of this
equipment before you install, configure, operate, or maintain this product. Users
are required to familiarize themselves with installation and wiring instructions
in addition to requirements of all applicable codes, laws, and standards.
ATTENTION: Installation, adjustments, putting into service, use, assembly,
disassembly, and maintenance are required to be carried out by suitably trained
personnel in accordance with applicable code of practice.
In case of malfunction or damage, no attempts at repair should be made. The
module should be returned to the manufacturer for repair. Do not dismantle
the module.
ATTENTION: This equipment is certified for use only within the surrounding air
temperature range of -20…+55 °C (-4…+131 °F). The equipment must not be
used outside of this range.
ATTENTION: Use only a soft dry anti-static cloth to wipe down equipment. Do
not use any cleaning agents.
ATTENTION: To comply with UL restrictions, the secondary circuit (backplane)
must be powered from a source compliant with the following:
Class 2 or Limited Voltage/Current.
ATTENTION: This equipment is not resistant to sunlight or other sources of
UV radiation.
WARNING: If you insert or remove the module while backplane 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.
WARNING: Secure any external connections that mate to this equipment by
using screws, sliding latches, threaded connectors, or other means provided
with this product.
WARNING: Do not disconnect equipment unless power has been removed or
the area is known to be nonhazardous.

POINT I/O 5V DC and 24V DC Very High Speed Counter Module 7
Publication 1734-IN003H-EN-E - December 2018
Additional Resources
Refer to the POINT I/O™ Very High-Speed Counter Module User Manual, publication
1734-UM003, for more information on how to use the module.
You can view or download publications at
http://www.rockwellautomation.com/literature/. To order paper copies of technical
documentation, contact your local Rockwell Automation distributor or sales
representative.
Before You Begin
The modules referred to in this publication are as follows:
• 1734-VHSC5, Series C
POINT I/O 5V DC Very High Speed Counter Module
• 1734-VHSC24, 1734-VHSC24K, Series C
POINT I/O 24V DC Very High Speed Counter Module
The VHSC is a two-module set:
• Module 1 houses the VHSC functionality.
• Module 2 provides screw terminals necessary to access chassis ground (chas gnd)
and common (C).
– Module 2 connects screws 4 and 5 and screws 6 and 7 for ease of wiring
power to the input device.
– Module 2 is not necessary for VHSC functionality.
– Module 2 serves only to ease customer wiring.
– Module 2 does not use a node address or consume power from the
POINTBus.
Mount module 2 adjacent to module 1.
Note that this series C product can be used with the following:
• DeviceNet® and PROFIBUS adapters
• ControlNet® and EtherNet/IP™ adapters, using RSLogix 5000® software, version
11 or later
See the figure to familiarize yourself with major parts of the module, noting that the wiring
base assembly is the 1734-TB or 1734-TBS POINT I/O™ two-piece terminal base, which
includes the 1734-RTB or 1734-RTBS removable terminal block, and 1734-MB
mounting base

8POINT I/O 5V DC and 24V DC Very High Speed Counter Module
Publication 1734-IN003H-EN-E - December 2018
POINT I/O VHSC Module with 1734-TB or 1734-TBS Base
Description Description
1 Module locking mechanism 6 Slide-in writable label
2 Module wiring diagram 7 Insertable I/O module
3 DIN rail locking screw (orange) 8 Removable terminal block (RTB) handle
4 Mechanical keying (orange) 9 Removable terminal block with screw
(1734-RTB) or spring clamp (1734-RTBS)
5 Interlocking side pieces 10 Mounting base
NODE:
0
1
0
1
1
2
3
4
5
6
8
9
10
7
41825

POINT I/O 5V DC and 24V DC Very High Speed Counter Module 9
Publication 1734-IN003H-EN-E - December 2018
Install the Mounting Base
To install the mounting base on the DIN rail (Allen-Bradley® part number 199-DR1;
46277-3; EN50022), proceed as follows.
1. Position the mounting base vertically above the installed units (adapter, power
supply or existing module).
ATTENTION: This product is grounded through the DIN rail to chassis ground.
Use zinc plated chromate-passivated steel DIN rail to assure proper grounding.
The use of other DIN rail materials (for example, aluminum or plastic) that can
corrode, oxidize, or are poor conductors, can result in improper or intermittent
grounding. Secure DIN rail to mounting surface approximately every 200 mm
(7.8 in.) and use end-anchors appropriately. Be sure to ground the DIN rail
properly. Refer to Industrial Automation Wiring and Grounding Guidelines,
Rockwell Automation publication 1770-4.1, for more information.
WARNING: When used in a Class I, Division 2, hazardous location, this
equipment must be mounted in a suitable enclosure with proper wiring method
that complies with the governing electrical codes.
46014

10 POINT I/O 5V DC and 24V DC Very High Speed Counter Module
Publication 1734-IN003H-EN-E - December 2018
2. Slide the mounting base down allowing the interlocking side pieces to engage the
adjacent module or adapter.
3. Press firmly to seat the mounting base on the DIN rail.
The mounting base snaps into place.
Install the Module
The module can be installed before or after base installation. Make sure that the mounting
base is correctly keyed before installing the module into the mounting base. In addition,
make sure the mounting base locking screw is positioned horizontal referenced to the base.
To install the module, proceed as follows.
1. Use a bladed screwdriver to rotate the keyswitch on the mounting base clockwise
until the number required for the type of module you are installing aligns with
the notch in the base.
2. Verify the DIN rail locking screw is in the horizontal position.
You cannot insert the module if the locking mechanism is unlocked.
WARNING: When you insert or remove the module while backplane 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.
Repeated electrical arcing causes excessive wear to contacts on both the
module and its mating connector. Worn contacts may create electrical
resistance that can affect module operation.