{"id":35355,"date":"2026-08-25T14:30:26","date_gmt":"2026-08-25T06:30:26","guid":{"rendered":"https:\/\/pxisource.com\/?post_type=product&#038;p=35355"},"modified":"2026-09-10T15:32:36","modified_gmt":"2026-09-10T07:32:36","slug":"pci-6601","status":"publish","type":"product","link":"https:\/\/pxisource.com\/ru\/product\/pci-6601\/","title":{"rendered":"PCI-6601"},"content":{"rendered":"<h3>PCI-6601 4-Channel 32-Bit Counter\/Timer Device<\/h3>\n<p>\u0417\u0435\u043c\u043b\u044f <strong>NI PCI-6601<\/strong> is a dedicated counter\/timer and digital I\/O device designed for event counting, frequency measurement, pulse generation, encoder monitoring and timing control.<\/p>\n<p>It provides four independent 32-bit counter\/timers with a maximum unprescaled source frequency of 20 MHz. Prescaling can support higher-frequency input signals in compatible measurement modes.<\/p>\n<p>Up to 32 individually configurable TTL\/CMOS digital I\/O lines provide flexible access to counter gates, sources, outputs and general-purpose digital signals.<\/p>\n<h3>Key Features of the PCI-6601<\/h3>\n<ul>\n<li>Four independent 32-bit counter\/timers<\/li>\n<li>20 MHz maximum unprescaled source frequency<\/li>\n<li>Higher-frequency measurements using supported prescalers<\/li>\n<li>Up to 32 digital I\/O lines<\/li>\n<li>5 V TTL\/CMOS-compatible digital signaling<\/li>\n<li>Event and edge counting<\/li>\n<li>\u0418\u0437\u043c\u0435\u0440\u0435\u043d\u0438\u0435 \u0447\u0430\u0441\u0442\u043e\u0442\u044b \u0438 \u043f\u0435\u0440\u0438\u043e\u0434\u0430<\/li>\n<li>Pulse-width and semi-period measurement<\/li>\n<li>Two-edge separation measurement<\/li>\n<li>Quadrature encoder measurement<\/li>\n<li>Pulse and pulse-train generation<\/li>\n<li>One high-speed DMA channel<\/li>\n<li>RTSI synchronization support<\/li>\n<li>68-pin female SCSI-II connector<\/li>\n<li>Conventional PCI interface<\/li>\n<\/ul>\n<h2>PCI-6601 Technical Specifications<\/h2>\n<table>\n<tbody>\n<tr>\n<th>Product Model<\/th>\n<td>PCI-6601<\/td>\n<\/tr>\n<tr>\n<th>Part Number<\/th>\n<td>777918-01<\/td>\n<\/tr>\n<tr>\n<th>Product Type<\/th>\n<td>Counter\/timer and digital I\/O device<\/td>\n<\/tr>\n<tr>\n<th>\u0428\u0438\u043d\u043d\u044b\u0439 \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441<\/th>\n<td>Conventional PCI<\/td>\n<\/tr>\n<tr>\n<th>Counter\/Timers<\/th>\n<td>4<\/td>\n<\/tr>\n<tr>\n<th>Counter Resolution<\/th>\n<td>32 bits<\/td>\n<\/tr>\n<tr>\n<th>Maximum Source Frequency<\/th>\n<td>20 MHz without prescaling<\/td>\n<\/tr>\n<tr>\n<th>Timebase Resolution<\/th>\n<td>50 ns using the 20 MHz timebase<\/td>\n<\/tr>\n<tr>\n<th>\u0426\u0438\u0444\u0440\u043e\u0432\u043e\u0439 \u0432\u0432\u043e\u0434-\u0432\u044b\u0432\u043e\u0434<\/th>\n<td>Up to 32 individually configurable lines<\/td>\n<\/tr>\n<tr>\n<th>Logic Compatibility<\/th>\n<td>5 V TTL\/CMOS<\/td>\n<\/tr>\n<tr>\n<th>DMA Resources<\/th>\n<td>One high-speed DMA channel<\/td>\n<\/tr>\n<tr>\n<th>\u0421\u0438\u043d\u0445\u0440\u043e\u043d\u0438\u0437\u0430\u0446\u0438\u044f<\/th>\n<td>RTSI trigger-bus support<\/td>\n<\/tr>\n<tr>\n<th>Front Connector<\/th>\n<td>68-pin female SCSI-II<\/td>\n<\/tr>\n<tr>\n<th>Driver Software<\/th>\n<td>NI-DAQmx or supported legacy NI software<\/td>\n<\/tr>\n<tr>\n<th>Lifecycle<\/th>\n<td>Legacy counter\/timer device<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>PCI-6601 Part Number and Accessories<\/h2>\n<table>\n<tbody>\n<tr>\n<th>Item<\/th>\n<th>Part Number<\/th>\n<th>\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435<\/th>\n<\/tr>\n<tr>\n<td>PCI-6601<\/td>\n<td>777918-01<\/td>\n<td>Four-channel, 32-bit PCI counter\/timer device<\/td>\n<\/tr>\n<tr>\n<td>SH68-68-D1 Cable<\/td>\n<td>183432-01 or 183432-02<\/td>\n<td>Shielded 68-pin digital I\/O cable; part number depends on length<\/td>\n<\/tr>\n<tr>\n<td>SCB-68A<\/td>\n<td>782536-01<\/td>\n<td>Shielded 68-pin screw-terminal connector block<\/td>\n<\/tr>\n<tr>\n<td>CB-68LP<\/td>\n<td>777145-01<\/td>\n<td>General-purpose 68-pin terminal block<\/td>\n<\/tr>\n<tr>\n<td>RTSI Cable<\/td>\n<td>System dependent<\/td>\n<td>Shares timing and trigger signals between compatible PCI devices<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The PCI-6601 uses a 68-pin female SCSI-II connector rather than the VHDCI connector found on many later M Series boards. Confirm the cable connector before ordering.<\/p>\n<h3>Four Independent Counters<\/h3>\n<p>Each 32-bit counter can measure or generate a timing signal independently. Multiple counters can also be combined for more complex measurements and synchronized pulse operations.<\/p>\n<p>The 32-bit resolution supports long measurement intervals and large event counts without frequent rollover.<\/p>\n<h3>Frequency and Period Measurement<\/h3>\n<p>The PCI-6601 can measure signal frequency, period, pulse width, semi-period and the separation between two edges. Measurement accuracy depends on the selected timebase and input-signal quality.<\/p>\n<p>The maximum unprescaled source frequency is 20 MHz. Supported prescaling modes can extend the measurable input frequency when individual input edges do not need to be resolved directly.<\/p>\n<h3>Quadrature Encoder Measurement<\/h3>\n<p>The counters can monitor quadrature encoder signals for position and direction measurement. Appropriate A, B and index connections must be wired to compatible counter input terminals.<\/p>\n<p>Industrial encoders using differential or higher-voltage signals require external receivers or isolation hardware.<\/p>\n<h3>Pulse and Pulse-Train Generation<\/h3>\n<p>The PCI-6601 can generate single pulses, continuous pulse trains and frequency-divided outputs. These functions are useful for device clocks, test triggers and step\/direction control signals.<\/p>\n<h3>Digital I\/O Capability<\/h3>\n<p>Up to 32 digital lines can be used for counter signals or general-purpose digital I\/O. Lines are compatible with 5 V TTL\/CMOS logic and should not directly drive high-current loads.<\/p>\n<h3>DMA and RTSI Synchronization<\/h3>\n<p>One DMA channel supports high-speed buffered counter operations. When multiple buffered tasks compete for the DMA resource, some operations may need interrupt-based transfers.<\/p>\n<p>The RTSI bus allows timing signals to be shared with other compatible PCI devices installed in the same computer.<\/p>\n<h2>PCI-6601 Applications<\/h2>\n<ul>\n<li>Event and edge counting<\/li>\n<li>Frequency measurement<\/li>\n<li>Period and pulse-width measurement<\/li>\n<li>Quadrature encoder monitoring<\/li>\n<li>Rotational speed measurement<\/li>\n<li>Pulse-train generation<\/li>\n<li>Frequency division<\/li>\n<li>Automated test timing<\/li>\n<li>Digital control and monitoring<\/li>\n<li>Machine position measurement<\/li>\n<li>Photon and detector pulse counting<\/li>\n<\/ul>\n<h3>Encoder and Motion Feedback<\/h3>\n<p>The PCI-6601 can monitor incremental encoder signals to calculate position, direction and speed. Signal conditioning should be selected according to encoder output type and cable length.<\/p>\n<h3>Automated Timing Systems<\/h3>\n<p>Generated pulses can trigger instruments, sequence test fixtures or provide a programmable clock to a DUT.<\/p>\n<h3>Event Counting<\/h3>\n<p>The 32-bit counters can count pulses produced by sensors, switches, detectors and electronic systems. Clean digital edges are essential for reliable counting.<\/p>\n<h2>PCI-6601 Installation Workflow<\/h2>\n<h4>Step 1: Verify the PCI Slot<\/h4>\n<p>Confirm that the computer contains a compatible conventional PCI expansion slot.<\/p>\n<h4>Step 2: Confirm Driver Compatibility<\/h4>\n<p>Check the operating system and supported NI-DAQmx or legacy driver version.<\/p>\n<h4>Step 3: Install the Board<\/h4>\n<p>Power down the computer, observe ESD precautions and secure the PCI-6601.<\/p>\n<h4>Step 4: Connect the 68-Pin Cable<\/h4>\n<p>Use a compatible SCSI-II cable such as the SH68-68-D1 and verify the terminal pinout.<\/p>\n<h4>Step 5: Test the Counters<\/h4>\n<p>Use NI MAX or a simple application to count a known TTL pulse source.<\/p>\n<h4>Step 6: Validate Signal Integrity<\/h4>\n<p>Check logic thresholds, grounding, edge quality, shielding and the selected counter source.<\/p>\n<h2>PCI-6601 Troubleshooting<\/h2>\n<h4>The counter records more pulses than expected<\/h4>\n<p>Noisy or slowly transitioning signals can produce false edges. Improve shielding or add a Schmitt-trigger buffer.<\/p>\n<h4>The counter remains at zero<\/h4>\n<p>Verify the physical source terminal, signal amplitude, ground reference and selected active edge.<\/p>\n<h4>Frequency measurement is unstable<\/h4>\n<p>Increase the measurement interval and check the input signal for jitter, noise or missing pulses.<\/p>\n<h4>A buffered counter task reports a DMA conflict<\/h4>\n<p>The PCI-6601 has one DMA channel. Reconfigure one task to use interrupts or change the task architecture.<\/p>\n<h4>The device is not detected<\/h4>\n<p>Check board seating, PCI compatibility and the installed NI driver version.<\/p>\n<h2>PCI-6601 Comparison<\/h2>\n<table>\n<tbody>\n<tr>\n<th>\u041c\u043e\u0434\u0435\u043b\u044c<\/th>\n<th>Counters<\/th>\n<th>\u0420\u0430\u0437\u0440\u0435\u0448\u0435\u043d\u0438\u0435<\/th>\n<th>Maximum Source Frequency<\/th>\n<th>Best Suited For<\/th>\n<\/tr>\n<tr>\n<td>PCI-6601<\/td>\n<td>4<\/td>\n<td>32-bit<\/td>\n<td>20 MHz<\/td>\n<td>General counter\/timer applications<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pxisource.com\/ru\/product\/pci-6602\/\">PCI-6602<\/a><\/td>\n<td>8<\/td>\n<td>32-bit<\/td>\n<td>80 MHz<\/td>\n<td>Higher counter density and speed<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pxisource.com\/ru\/product\/pci-6624\/\">PCI-6624<\/a><\/td>\n<td>8<\/td>\n<td>32-bit<\/td>\n<td>Higher-performance timing<\/td>\n<td>Advanced counter applications<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pxisource.com\/ru\/product\/pcie-6612\/\">PCIe-6612<\/a><\/td>\n<td>8<\/td>\n<td>32-bit<\/td>\n<td>High-speed PCI Express timing<\/td>\n<td>Newer PCIe systems<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>PCI-6601 vs PCI-6602<\/h3>\n<p>The PCI-6601 provides four counters with a 20 MHz maximum unprescaled source frequency. The PCI-6602 provides eight counters and higher timing performance.<\/p>\n<h3>PCI-6601 vs PCIe-6612<\/h3>\n<p>The PCIe-6612 uses PCI Express and provides more counters with newer timing capabilities. Migration requires verification of connector pinout, timing behavior and software.<\/p>\n<h3>Why Choose the PCI-6601?<\/h3>\n<p>Choose the PCI-6601 for maintaining conventional PCI systems that require four dedicated counters, extensive TTL digital connectivity and NI-compatible timing functions.<\/p>\n<h2>PCI-6601 Frequently Asked Questions<\/h2>\n<h4>What is the PCI-6601 part number?<\/h4>\n<p>The standard part number is <strong>777918-01<\/strong>.<\/p>\n<h4>How many counters does it provide?<\/h4>\n<p>The PCI-6601 provides four independent 32-bit counter\/timers.<\/p>\n<h4>What is the maximum input frequency?<\/h4>\n<p>The maximum unprescaled source frequency is 20 MHz.<\/p>\n<h4>Can it measure an encoder?<\/h4>\n<p>Yes. It supports quadrature encoder position and direction measurement.<\/p>\n<h4>Which cable is commonly used?<\/h4>\n<p>The SH68-68-D1 shielded digital cable is a common connection option.<\/p>\n<h4>Does it measure analog voltage?<\/h4>\n<p>No. The PCI-6601 is a counter\/timer and digital I\/O device rather than an analog DAQ board.<\/p>\n<h3>Recommended Related Products<\/h3>\n<ul>\n<li><a href=\"https:\/\/pxisource.com\/ru\/product\/pci-6602\/\">PCI-6602 Counter\/Timer Device<\/a><\/li>\n<li><a href=\"https:\/\/pxisource.com\/ru\/product\/pci-6624\/\">PCI-6624 Counter\/Timer Device<\/a><\/li>\n<li><a href=\"https:\/\/pxisource.com\/ru\/product\/pcie-6612\/\">PCIe-6612 Counter\/Timer Device<\/a><\/li>\n<li><a href=\"https:\/\/pxisource.com\/ru\/product-category\/%d0%bd%d0%b8\/data-acquisition\/\">View More NI Data Acquisition Products<\/a><\/li>\n<\/ul>\n<h3>Request a Quote for the PCI-6601<\/h3>\n<p>Contact us for current availability and pricing for the <strong>NI PCI-6601 Counter\/Timer Device<\/strong>. We can also help identify compatible SH68-68-D1 cables, connector blocks and newer PCI Express timing devices.<\/p>","protected":false},"excerpt":{"rendered":"<p>PCI-6601 4-Channel 32-Bit Counter\/Timer Device The NI PCI-6601 is a dedicated counter\/timer and digital I\/O device designed for event counting,<\/p>","protected":false},"featured_media":35254,"template":"","meta":{"_acf_changed":false},"product_brand":[18],"product_cat":[674],"product_tag":[],"class_list":["post-35355","product","type-product","status-publish","has-post-thumbnail","product_brand-national-instruments","product_cat-pci-modules","first","instock","shipping-taxable","product-type-simple"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.0 (Yoast SEO v28.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>NI PCI-6601 Counter\/Timer Device 777918-01, In Stock | Project Pricing<\/title>\n<meta name=\"description\" content=\"The PCI-6601 is a 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