This product was certified with the above certifications as of 2023-11-09. 5 BTU/hr Isolation voltage 50V (continuous), Basic Insulation Type between field side and. 1734-IB8S Allen-Bradley POINT I/O. QTY: 2 . Allen-Bradley 1734-IB8 POINT Digital DC Input Module 24V DC 8Ch Sink, Series D. 39/ea. yimingkeji (91) 100%. DIGITAL INPUT SAFETY MODULE, 8 POINT, SAFETY SINKING, 8. Guard I/O 1734-IB8S/B y 1734-IB8SK/B, que pueden presentar un fallo de conexión intermitente. Allen Bradley . 1734-IB8S Allen Bradley and other Allen Bradley PLCs offer a wide range of features and functionalities that can help companies streamline their control systems. 00. 8 Safety-Rated Sink Inputs 24V DC (11VDC - 28. Get it Sep 7 - 14. UPP. Allen-Bradley 1734-IB8S POINT Digital DC Input Module 24V DC 8-Ch Sink Safety-Rated. in the tools and supplies, misc products category. The POINT I/O module (B) snaps into The affected products are the 1734-IB8S/B manufactured within the date range of 2020/05/01 through 2021/09/30 and the 1734-IB8SK/B manufactured within the date range of 2020/05/01 through 2021/10/29. TYPE. The SafeZone laser scanner control provides two PNP outputs that are turned off when an object interrupts its field of view. ALLEN BRADLEY. ‹ View all 1734 POINT I/O Modules SHARE THIS: Email. Installation Instructions. Reading through the POINT I/O manual, it looks like my digital/analog input modules can be set up as single channel (digital only if I'm using the safety application instructions) and. 1734-UM013. Allen-Bradley 1734-IB8S POINT Digital DC Input Module 24V DC 8-Ch Sink Safety-Rated. 288. The 1734-IB8S and OB8S are 8-point modules for their respective inputs or outputs. Allen-Bradley / Rockwell Automation POINT. PUBLICATION NUMBER. The 1734-IB8SK digital input module is conformally coated for protection and it can be connected to a terminal base that has 8 termination points. Catalog #: 1734-IB8S. 99 New; $70. About the Module The 1734 sink input modules are available in 2 input, 4 input, and 8 input. If the. Find a Distributor. 2 W Thermal dissipation 8. Model No. 3. Product Notice 2022-05-001 - Allen-Bradley POINT Guard I/O 1734-IB8S/B, 1734-IB8SK/B Intermittent Connection Fault. pdf, 1734-IB8S Safety Input Status Indicator Off - Safety input is off, or module is being configured. Add to BoM. RESOURCE. Lifecycle status: ACTIVE Find a Distributor Learn how to avoid the risks of unauthorized and counterfeit. 0 out of 5 stars based on 3 product ratings (3) $1,099. Allen-Bradley 1734-OB8S POINT I/O Output Module with 8-Channel Safety Sourcing, 1A max, Series A 10612598350640 UPP Ser APublication 1734-IN028A-EN-P - June 2006 Installation Instructions POINT I/O One-piece Terminal Bases Catalog Numbers 1734-TOP, 1734-TOPS, 1734-TOP3, 1734-TOP3S About This Publication Read this publication for informatio n about these terminal bases. ALLEN BRADLEY. Get A Quote and We Will Ship it Today!Publication 1734-IN051I-EN-E - June 2015 Environment and Enclosure Preventing Electrostatic Discharge ATTENTION: This equipment is intended for use in a Pollution Degree 2 industrial environment, in overvoltage Category II applications (as defined in IEC 60664-1), at altitudes up to 2000 m (6562 ft) without derating. Si se produce la anomalía, el resultado será el siguiente: • El modo de fallo del módulo 16#0010 o el estado del módulo no permite que el objeto realice el servicio solicitado • Se agotó el tiempo de conexión del fallo del módulo 16#0203 DC Input Module,8 Points,Safety,IP20,POINT,24VDC, Sinking. 1734 aentr point allen bradley adapter port ethernet ip plc odva marketplace power favorites device1pc new ab 1734-ib8s digital input module 24vdc 8channel: amazon. In stock Express delivery. Buy 1734-IB8S / 1734-IB8S Allen Bradley Point Guard I/O Module from Distributor Santa Clara Systems. We Offer Fast Same-Day Shipping Today! Click to Check if In-Stock. The 1734-OBV2S that provide 2 configurable outputs. Overview I/O Module, Safety, Digital DC Output, 8. We can often get it through our suppliers. 8 Sink Inputs 24V DC (10VDC - 28. 1734-IB8S, 1734-OB8S, 1734-IE4S RA-DU002, 1734-UM013J-EN-P 1734-UM013I-EN-P wiring diagram 1734-IB8s 1734-IB8S 1734-OB8S 1734-TOP3 wiring diagram 1734-IE8C wiring+diagram+1734-IB8s wiring diagram 1734-IB8: 2009 - 1734-IB8S. RESOURCE. 1734 POINT I/O Rockwell Automation 1734-IB8S Send Print. DC Input Module,8 Points,Safety,IP20,POINT,24VDC, Sinking. Please review the product label to check for the certifications your specific product carries. PUBLICATION NUMBER. TYPE. Find all available product literature for this product in the Literature Library results . Selection Guide. Rockwell Automation:Product Lifecycle Status and information. 5337. 8 Safety-Rated Sink Inputs 24V DC (11VDC 10612598350619 SSP Ser A 1. 752. 752. Abstract: 1734-OB8S 1734-TB 1734-IB8 1734-OB8 Text: and distributed control applications. 1734-IN016. Each type of communication interface (Network Adaptor)RESOURCE. This module has Eight (8) current sinking input channels at 11-30V, 3. Top Rated Seller Top Rated Seller. The Allen-Bradley 1734-OB8 is a POINT IO module that features Eight (8) Discrete, non-isolated sourcing output channels. Publication 1734-SG001G-EN-P - September 2019 6 POINT I/O Family The POINT I/O System The base (A) mounts onto the DIN rail and provides the backplane. Modules to the right of the affected module may have the NS LED in the OFF state, indicating the module is not communicating with the network. Allen-Bradley Safe Input Module 1734-IB8S Digital Input PN-193342 Series, B. 45238585 45288627 45291872 45292655 45292855 45319627 45412810 45439438 45883217 460208361734-IB8S, 1734-OB8S, 1734-IE4S – Technical Specifications Attribute 1734-IB8S 1734-OB8S 1734-IE4S POINTBus POINTBus current, max 175 mA 190 mA 110 mA @ 5V Power dissipation, max 2. User Manual. New and refurbished products are covered by a Wiautomation warranty of 12 months from the delivery date, the used products are guaranteed for 6 months by Wiautomation. AB Guardlogix Point I/O Safety Output (1734-OB8S) Dual vs Single Channel - SIL3. Join Now! We have updated our data protection policies based on new GDPR act. Quickly access technical documents for Allen-Bradley Bulletin 1734 POINT I/O and communication modules and POINT Guard I/O modules. from Hong Kong. If you are remote locations, it will need to add 2 days for delivery. Spec Sheet. Products sold before or after this date might carry different certifications. 1734-IB8S/A New and Used available. 1734-UM004. Installation Instructions. Allen-Bradley 1734-IB8S POINT Digital Input Module 24VDC 8-Ch Sink Safety, Ser B: $399. Allen-Bradley 1734-IB8S POINT Digital Input Module 24VDC 8-Ch Sink Safety, Ser A. PUBLICATION NUMBER. welcome to contact us when you need the products, we can response in 12 hours. 1734-OB8S PDF Check Details 1734 ib8s wiring diagram. Installation Instructions. 1734-8cfg wiring diagramAllen-bradley 1734-ib8s installation & user manual pdf download 440r-d22r2 wiring diagram1734 wiring diagram bradley allen point plc ra plchardware plch aent. On-state input voltage for the 1734-IB8S is 11…30 Volts DC, 3. The 1734-IB8S first channel is input 0 or labeled as I0 on diagram 1. POINT I/O Terminal Bases: Selection, Compatibility & Internal Wiring. The 1734-IB8S first channel is input 0 or labeled as I0 on diagram 1. 752. Allen-Bradley 1734-IB8S PLC Input/output Module. 8VDC) 10612598350619The Allen-Bradley 1734-IB8S is a POINT Guard I/O Safety Discrete Input module. TYPE. User Manual. Please review the product label to check for the certifications your specific product carries. PCO Products. Find Product Drawings. Catalog Numbers 1734-8CFGDLX Summary of Changes This publication contains the following new or updated information. 24V Dc 8 Channel Sink Input Module. ALLEN BRADLEY. Micro800™ L50E/L70E implicit (Class 1) communications setup with 1734 POINT I/O™. 800. 5500. 1734-IB8S. Ask us about 1734-IB8S/B Repairs. 5962 Welcome!Catalog #: 1734-IB8S DC Input Module, 8 Points, Safety, IP20, POINT, 24VDC, Sinking. 752. Rockwell Automation Allen-Bradley 1734-IB8S User Manual (212 pages) I/O Safety Modules. 1734-IB8. 1734-IB8S. 1734 - ib8, how to connect 1734 -ib8, 1734,Certifications. User Manual. Buy 1734-IB8S / 1734-IB8S Allen Bradley Point Guard I/O Module from Distributor Santa Clara Systems. Looking at these modules we notice they have 16 channels available with similar wiring schemes. 1734-TB PLCs/Machine Control from ALLEN BRADLEY In Stock, Order Now! Same Day Shipping, 2-Year Warranty - TERMINAL BASE, POINT I/O, 1734-MB AND 1734-RTB, 8 SCREW-CLAMP TERMINALS, OPEN STYLE, DIN MOUNTED. Find all available product literature for this product in the Literature Library results . Only after the fault is cleared and the gate is cycled is the. POINT Guard I/O Safety Module – 8 Point Input Module (Compatible with terminal bases with 8 terminations) Manufacturer Rockwell AutomationA-B1734IB8S. The affected product is the 1734-IB8S Series B POINT I/O Input Safety Module manufactured from December 9, 2015, through February 2, 2016. Usually ships within 4 to 5 days. User Manual. Faixa de tensão 1734-IB8S 137 Especificação da tensão de entrada em estada desenergizado 137 Faixa de temperatura 1734-IB8S 138 Faixa de temperatura 1734-OB8S 139 Especificação da tensão de isolação 140 Código de temperatura norte-americano 140 Faixa de temperatura em operação 141 Especificação de imunidade RF radiada 141 1734-IB8S PLCs/Machine Control from ALLEN BRADLEY In Stock, Order Now! Same Day Shipping, 2-Year Warranty, Radwell Repairs - DIGITAL INPUT SAFETY MODULE, 8 POINT, SAFETY SINKING, 8 X 24 VDC, TB/TOP/TOP3 TERMINAL BASE, IP20 The mounting base assembly (catalog numbers 1734-TB or 1734-TBS) consists of a mounting base and a removable terminal block. Sponsored. Allen-Bradley 1734-IB8S. 1734-IN016. User Manual. Input Module,POINT I/O,Digital,DC,8 Points Sinking 24VDC Input,Open Style,DIN Mounted1734-IB8S는 알렌-브래들리 제조된 모듈이 안전 도구화 수준 (SIL) 요구와 적용에 사용했다는 것 입니다. 39,372. 1734-UM013. $295. We are working quickly to resolve the issue. 32 BTU/hr 7. RESOURCE. RESOURCE. Allen-Bradley 1734-IB8S POINT Digital DC Input Module 24V DC 8-Ch Sink Safety-Rated. 1734-SG001. 752. Flag. Categories. POINT Digital AC Input Modules Cat. The 1734-AENT adapters can work with existing profiles in RSLogix 5000 software version 16 with compatible keying. Thus, it is the OSSD outputs that test the integrity of the wiring between the SensaGuard switch and the safety inputs. 5. 1734-IN040. Find Product Drawings. 8 Safety-Rated Sink Inputs 24V DC (11VDC - 28. 5,0. China CCC; This product was certified with the above certifications as of 2023-11-01. buy surplus as low as $570. Find all available product literature for this product in the Literature Library results . I/O Module, Safety, 8 Point Input, Compatible with Terminal Bases with 8 Terminations. Find more technical documentation for this product in the Technical Documentation Center . 884. We have 3 Allen-Bradley 1734-IB8 manuals available for free PDF download: User Manual, Installation Instructions Manual. For the 1734-IB8S POINT Guard modules there are Series A and Series B hardware versions. 1734-IB8S/A - POINT Digital DC Input Module 24V DC 8-Ch Sink Safety-Rated. POINT I/O 8 Point Digital Input Module Lifecycle status: ACTIVE Find a Distributor to avoid the risks of unauthorized and counterfeit products. The I/O modules are interfaced to a network through a communication interface, which includes a built-in power supply that converts incoming 24V DC power to 5V DC backplane power. Width. 9393. Complete the Safety Configuration. Details Mint Allen Bradley 1734-IB8S /B 8 POINT SAFETY INPUT MODULE 24VDC. TYPE. 1734-IN016. Find all available product literature for this product in the Literature Library results . $590. Appendix A. 00 New; $1,664. Go to checkout. Make sure you wanted a 1734-Ep24dc and not a 1734-FPD module. Manufacturer : Allen-Bradley. : 1734-IB8S. Opens in a new window or tab. PUBLICATION NUMBER. Affected 1734-IB8S modules must be replaced. 1734 rockwell automation page705069 ib8s wiring diagram 1734 ib8 wiring diagram flow using meter manual output bradley allen pulses count mrplc forums transmitter pulse shows1734 ob8s wiring. 1734-IN023) 1734-IB8S/B, 1734-IB8SK/B Intermittent connection fault ; Managing the Safety Network Number (SNN) on a Safety Application ; 1734-IB8S and 1734-OB8S Terminal Base Selection ; Rockwell Automation Products: User Manuals and Other Publications ; 1734-IB8S: Run Mode and Connection Fault tag 1734-UM004 Describes how to use 1734-IR2, 1734-IT2I, and 1734-IR2E modules Synchronous Serial Interface Encoder Module Installation Instructions, publication 1734-IN581 The 1734-AENT adapter appears in the Controller Organizer with the Point IO 5 Slot Chassis backplane displayed below it. Catalog Numbers 5069-IB8S, 5069-IB8SK The 5069-IB8S and 5069-IB8SK modules are 8-point safety sinking input modules. Get. Jdeloz828. 8 Volts DC, 3. Find Firmware & Downloads. This hardware has a maximum off-state input voltage of 5 Volts DC. 1734-IB8S SER B Allen-Bradley Safety Sinking Input Module. The 1734-AENTR Add-on Profiles are compatible with RSLogix 5000 software version 17, or greater. 83. Model:1734-IB8S ; Type:Safety Sinking Input Module ; 100% large stock, New In Box, 1 year warranty！We have all products series, you can contact us at any time with discount price ; Our company has been engaged in this industry for more than 11 years, both offline (with 3 branches) and online, selling well all over the country. 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. Installation Instructions. NFS Safety Sinking Input Module 1734-IB8S New Factory Sealed . 8 Safety-Rated Sink Inputs 24V DC (11VDC 10612598350619 SOP Ser B 1. 1734-IN051. Aug 31 2016. SIL3/PLe CAT 4. Bombay Air Cargo. Brand: Allen-Bradley | Category: Control Unit | Size: 12. Products sold before or after this date might carry different certifications. 1734-TOPS, 1734-TOP3, 1734-TOP3S. 011. 2. Print. The 1734-IB8S module is monitoring the input from the SafeZone laser scanner control. TYPE. Catalog #: 1734-IB8S 8 Channel Sfty Sinking Inp Mod PN-25132. None. TYPE. PUBLICATION NUMBER. Continue shopping. If intrusion into the SafeZone area is detected, the final control devices, a pair of. ‹ View all 1734 POINT I/O Modules SHARE THIS: Email. 1734-IB8S is a safety input module that provides eight channels of sinking input protection for Allen-Bradley safety-related devices. Shipping to 240+ countries worldwide. Selection Guide. Installation Instructions. Product Details. 8 Channel Sfty Sinking Inp Mod PN-25132. 58. Allen-Bradley 1734-IB8S Manual Online: Wiring Examples. Installation Instructions. Input type : Current sinking. Recíbelo el may 16 - 19. 1734-UM001. RESOURCE. $1,499. Some of these faults you can reset and go. Installation Instructions. User Manual. Check part details, parametric & specs updated 17 NOV 2023 and download pdf datasheet from datasheets. Registro Italiano Navale. 1734-UM013. com, a global distributor of electronics components. Shipping From Italy - Worldwide by DHL. 5962 Welcome! The 1734-IB8S is a POINT Guard I/O Safety Module by Allen-Bradley and Rockwell Automation. Solid green. 1734 POINT I/O modules offer 1 to 8 points per module. Octopart is the world's source for 1734-IB8S availability, pricing, and technical specs and other electronic parts. Our 1734-IB8S digital input safety module has a two year warranty and is ready to ship today. POINT I/O is a family of modular I/O products ideal for applications requiring flexibility and low cost of ownership. 02 W 2. In RSLogix 5K, there is no safety signature and the safety system is unlocked. 12 mm. When the external input contact is closed, a test pulse is output from the test output terminal to diagnose the field wiring and input circuitry. 5. Products sold before or after this date might carry different certifications. Print. 90 (1,456) Origin. Download it for free from Rockwell Automation. Installation Instructions. Buy online now with next. Apply power to this connector. Important User Information Read this document and the documents listed in the additional resources section about installation, configuration, andRegistro Italiano Navale. Find more technical documentation for this product in the Technical Documentation Center . We're Sorry Search is temporarily unavailable. Preferred Availability POINT I/O 8 Point Digital Input Module. Installation Instructions. Project. Configure the POINT Guard I/O Modules Follow these steps to add the 1734-IB8S and 1734-OB8S modules to the POINT I/O backplane. Order international: +1 609. POINT I/O wiring base assembly POINT I/O Wiring Base Assembly Installation Instructions 1734--IN013 Very high speed counter module POINT I/O 24V dc Very High Speed Counter Module 1734-IN003 POINT I/O 5V dc Very High Speed Counter Module 1734-IN004 Very High Speed Counter Module User Manual 1734-UM003 RSLinx RSLinx Getting Results. – Dual-channel mode evaluates consistency between two input signals (channels), which allows use of the module for safety Category 3 and 4of a 1734-IB8S module. 00. Find Product Drawings. 5 milliAmps at 40 degrees Celsius and 11…28. Read this section for examples of wiring by application. Some need a power cycle to clear. Affected product must be identified by the product’s serial number, as documented in Appendix B ofROCKWELL AUTOMATION #1734-IB8S Distributed I/O Digital Module, DC Input, Safety Rated, 8 Inputs, 0 Outputs SKU # 61259835061 Manufacturer Series: 1734 Point I/O Set Required Date Required by: (edit) Qty. Product Notice 2022-05-001 - Allen-Bradley POINT Guard I/O 1734-IB8S/B, 1734-IB8SK/B Intermittent Connection Fault. Wiring ebl diagrams sfi1734 ib8s wiring diagram Diagram fanuc wiring output ge plc pdfsupply pdfIc693alg392 ge fanuc. 99 New; $897. Control Unit Allen-Bradley 1734-IB8S User Manual 236 pages. £139. Tested and 2-Year Warranty. Page 27 Chapter 2 Figure 5 - Test Pulse in a Cycle For the 1734-IB8S module, the pulse width (X) is typically 525 μs; the pulse period (Y) is typically 144 ms. PUBLICATION NUMBER. Registro Italiano Navale. 5962 Welcome!EtherNet/IP 1734-AENT 1734-AENTR • 在控制器和 I/O 设备之间高速传输时间要求苛刻的数据 • 确定的、可重复的数据传递 • 介质冗余 • 控制器冗余 • 本质安全 ControlNet 1734-ACNR • 底层设备直接连接到工厂级控制器，不进行转接 • 按需求发送数据Installation Instructions. the 1734-IB8S data is created as a controller scope safety tag. Descripción: Allen-Bradley, Rockwell Automation | 1734-IB8S/B | Módulo de entrada digital 24VDC 8-Ch de seguridad del fregadero Módulo de entrada digital DC 24V DC 8-Ch fregadero de seguridad clasificado. Find all available product literature for this product in the Literature Library results . Publication 1734-IN051H-EN-E - April 2013 Environment and Enclosure Preventing Electrostatic Discharge ATTENTION: This equipment is intended for use in a Pollution Degree 2 industrial environment, in overvoltage Category II applications (as defined in IEC 60664-1), at altitudes up to 2000 m (6562 ft) without derating. Allen-Bradley. 02 W 2. Product No. TYPE. Order Today!1734-IB8S, 1734-OB8S, 1734-IE4S – Technical Specifications Attribute 1734-IB8S 1734-OB8S 1734-IE4S POINTBus POINTBus current, max 175 mA 190 mA 110 mA @ 5V Power dissipation, max 2. 44 W 3. Wall mounting/direct mounting. The I/O Configuration tree displays the 1734-IB8S module. Rockwell Automation Publication 1734-UM013J-EN-P - July 2014. Circuit & Load Protection (3340) Condition Monitoring (205) Connection Devices (3537) Drives & Motors (4444) Energy Monitoring (153) Human Machine Interface (258) Industrial Computers & Monitors (193)in a Cycle For the 1734-IB8S module, the pulse width (X) is typically 525 μs; the pulse period (Y) is typically 144 ms. Page 1 POINT Guard I/O Safety Modules Catalog Numbers 1734-IB8S, 1734-OB8S Installation & User Manual. Catalogue No:1734-IB8S · 24V DC I/O circuits · 8 inputs or 8 outputs Representative Photo Only (actual product may vary based on configuration selections) POINT Guard I/O Safety Module - 8 Point Input Module (Compatible with terminal bases with 8 terminations) SPECIFICATIONS Product Series Component Type Fieldbus I/O. Catalog #: 1734-IB8. Description. AutoCAD® (DWG) Drawing Interchange Format (DXF) Adobe® PDF. The safety code in the safety processor monitors the status of the safety inputs using a pre-certified safety instruction named Dual Channel Input Stop (DCS). However when I changed the configuration for pulse test it no longer works; Input Config; Type: Single. With features such as integrated motion control, advanced diagnostics, and support for multiple I/O modules, Allen Bradley PLCs enable companies to control their processes more. POINT I/O 8 Point Digital Input Module-K. 1734-IN016. POINT I/O 8 Point Digital Input Module. Registro Italiano Navale. 8 Channel Sfty Sinking Inp Mod PN-25132. Point Mode: Safety Pulse Test. Find all available product literature for this product in the Literature Library results . Reply More posts you may like. Warranty Terms and Conditions. Find more technical documentation for this product in the Technical Documentation Center . Page. PUBLICATION NUMBER. Description: Genuine Allen Bradley® Input Module Brand: Allen Bradley Condition: New Part Number: 1734-IB8S Replace Part Number: 1734-IB8S, 1734IB8S Allen-Bradley is the brand-name of a line of factory automation equipment, today owned by Rockwell Automation. 1734-IB8S/B New and Used available. 1734-IB8S Allen-Bradley. 1734-IN016. 4 as defined in IEC 61508, IEC 61511, IEC 62061, and ISO 13849-1. 1734-IB8S Digital Input Module Features • Safety digital inputs – Safety devices, such as Emergency Stop PushButton, gate switches, and safety light curtains, can be connected. no. ATTENTION: Do not remove or replace a Terminal Base unit while power is. Communicates by using the CIP™ Safety protocol over EtherNet/IP™ for GuardLogix™ controllers. Octopart is the world's source for 1734-IB8S availability, pricing, and technical specs and other electronic parts. Catalog #: 1734-IB8S Rockwell Automation Publication 1734-IN018E-EN-E - September 2022 3 POINT I/O Output Module Installation Instructions Environment and Enclosure North American Hazardous Location Approval ATTENTION: This equipment is intended for use in a Pollution Degree 2 industrial environment, in overvoltage Category II applications (as defined in EN/IEC 1734-IB8S module. Installation Instructions. 2 Rockwell Automation Publication 1734-IN033F-EN-E - September 2022 POINT I/O 8 Channel High Density Current Input Module Installation Instructions 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. Product Details. POINT Guard I/O™ fits into the stadard POINT I/O™ system, supports 24 V DC I/O circuits, and includes analog input circuits. 2. Warranty Terms and Conditions. Search Rockwell Automation. Find more technical documentation for this product in the Technical Documentation Center . Cat #: 1734-OB8S UPC: 612598350643 Sign In or Register to view pricing and more. RESOURCE. User Manual. 1734-ib8s. Installation Instructions. 0. Order before 15. Recommended Action - Turn on the safety input or reconfigure the channel, if desired.