Beckhoff KL1512 Up/Down Counter 2-Channel 24V DC 1kHz 16-bit
Introduction:
The KL1512 is a 2-channel up/down counter bus terminal from Beckhoff. It counts binary pulses up to 1 kHz with 16-bit resolution. This module transmits the counter state in electrically isolated form to the higher-level automation device.
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Product Attributes:
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Product Overview
The KL1512 belongs to the KL Series product line. Its product type is a 2-channel up/down counter. The product classification is I/O Modules. The current price for this item is ¥1,450 RMB, and the product gross weight is 0.06 kg (approx. 55 g) .
Beckhoff designed this up/down counter for simple counting tasks, such as connection with flow meters. Optionally, the KL1512 can be set up as an up counter or a down counter (16-bit). The bus terminal contains two inputs that indicate their signal state by means of light emitting diodes. Furthermore, the module transmits the counter state in electrically isolated form to the higher-level automation device. Consequently, the KL1512 suits applications requiring reliable pulse counting with electrical isolation.
Technical Specifications
Input Channels and Counting Function
This module provides 2 input channels for counting binary pulses. Optionally, the KL1512 can be configured as an up counter or a down counter. The counter depth is 16 bits , allowing count values from 0 to 65535 (or -32768 to +32767 in signed mode). Therefore, this terminal handles moderate counting requirements in industrial applications.
Input Electrical Specifications
The nominal voltage is 24 V DC with a tolerance range of -15% to +20% . The "0" signal voltage spans -3 to +5 V , while the "1" signal voltage ranges from 15 to 30 V . The typical input current measures 5 mA . Additionally, the input filter time is 0.2 ms , providing noise rejection for reliable signal detection.
Counting Frequency
The maximum counting frequency reaches 1 kHz . This speed suits many industrial counting applications, including flow meters, conveyor counting, and position monitoring. For higher frequency requirements, consider Beckhoff's high-speed counter terminals.
Current Consumption
On the K-bus , the current consumption is typically 50 mA . For comparison, standard digital input terminals typically draw only 3-5 mA. The higher consumption reflects the additional processing required for counting functions.
Electrical Isolation
The module provides 500 V of electrical isolation between the K-bus and field potential. This isolation protects the bus system and other terminals from field wiring faults. As a result, the KL1512 ensures reliable operation even in electrically noisy environments.
Process Image and Configuration
The bit width in the process image consists of 16-bit data plus 8-bit control/status for each channel. Configuration occurs via the Bus Coupler or the controller . No local switches or jumpers are required. Thus, the module integrates seamlessly into Beckhoff automation systems.
LED Indicators
LEDs on the front panel indicate the signal state of each input channel. These indicators provide immediate visual feedback for troubleshooting and commissioning. Consequently, operators can quickly identify active counting pulses without software tools.
Housing and Dimensions
The compact terminal housing measures 12 mm (W) x 100 mm (H) x 73 mm (D) . Polycarbonate forms the housing material, offering durability and UL recognition. With a width of only 12 mm, this terminal enables high-density installations on DIN rail.
Pluggable Wiring
For all KSxxxx Bus Terminals , pluggable wiring is available as an option. This feature allows pre-wiring of the terminal block before installation. Therefore, module replacement becomes faster and does not require rewiring.
Installation Requirements
Mount the KL1512 on 35 mm DIN rail conforming to EN 60715 with integrated lock. The protection rating is IP20 , and the installation position remains variable. Marking can be applied using the BZxxx series labeling system.
Environmental Specifications
The operating temperature range spans 0 to +55°C . For storage, the range extends from -25 to +85°C . Relative humidity tolerance reaches 95% without condensation . Thus, the KL1512 operates reliably in typical industrial control cabinets.
Vibration and Shock Resistance
Vibration resistance conforms to EN 60068-2-6 standards. Similarly, shock resistance conforms to EN 60068-2-27 . This rugged construction withstands demanding industrial machinery environments.
EMC Compliance
EMC immunity conforms to EN 61000-6-2 for industrial environments. Meanwhile, EMC emission conforms to EN 61000-6-4 for residential and industrial areas. Consequently, the KL1512 meets European EMC requirements without additional filtering.
Approvals and Certifications
The KL1512 holds multiple international approvals. CE marking confirms European conformity. UL listing ensures North American acceptance. Ex approval permits installation in hazardous areas (check specific Ex classification for your region).
Installation Guide
Follow these steps to install your KL1512 correctly.
Power Down the System: Disconnect power from the Bus Coupler and power supply. This prevents electrical damage during installation.
Mount the DIN Rail: Ensure your 35 mm DIN rail (EN 60715) is properly secured. The rail should be grounded according to local regulations.
Attach the Terminal: Hook the KL1512 onto the DIN rail from the top. Press downward until the lock engages with an audible click.
Connect the Bus Side: Insert the KL1512 onto the bus side of the adjacent terminal. The double slot and key connection ensures proper alignment.
Wire the Inputs: Connect your pulse-generating devices (e.g., flow meters, encoders) to the two input channels. Observe proper polarity for 24V DC signals.
Apply Power: Restore power to the Bus Coupler and the 24V supply. Verify that the KL1512 powers up without errors.
Configure the Counter: Use your Beckhoff TwinCAT software to configure the KL1512 as an up counter or down counter. Set the counter depth and other parameters via the Bus Coupler.
Test Operation: Apply test pulses to the inputs. Monitor the counter value in the process image. Confirm that the 16-bit data reflects the correct count.
Package List
1 x KL1512 Up/Down Counter Bus Terminal (2-channel)
1 x DIN rail lock (integrated into housing)
1 x Label strip for BZxxx series marking
1 x Installation instruction manual
Note: For pluggable wiring (KSxxxx series), order the appropriate terminal block separately.
Frequently Asked Questions (FAQ)
1. What is the maximum counting frequency of the KL1512 ?
The maximum counting frequency is 1 kHz . For example, this speed suits flow meters and conveyor counting applications. In contrast, for higher frequency requirements (up to 100 kHz), consider the KL15xx series high-speed counters.
2. Can I configure the KL1512 as an up counter or a down counter?
Yes, the KL1512 can be optionally set up as an up counter or a down counter (16-bit). Configuration is performed via the Bus Coupler or the controller . No local switches or jumpers are required.
3. What is the counter depth of this module?
The counter depth is 16 bits . This allows count values from 0 to 65535 for up counting. For down counting, the range is from 65535 down to 0. Therefore, this module suits moderate-range counting applications.
4. Does the KL1512 provide electrical isolation?
Yes, the module provides 500 V electrical isolation between the K-bus and field potential. This isolation protects the bus system from field wiring faults. Consequently, the KL1512 ensures reliable operation in electrically noisy industrial environments.
5. What approvals does the KL1512 hold?
The KL1512 holds CE, UL, and Ex approvals. CE confirms European conformity. UL ensures North American acceptance. Ex permits installation in hazardous areas (consult the product documentation for specific Ex classification details).