Feimu Technology Company has specially prepared an analog input module for overseas industrial automation professionals. This module is highly versatile and can be used in Rockwell CompactLogix and ControlLogix expansion systems - the Allen Bradley 1734-IE4CK. As those who have conducted on-site debugging know, one wants to measure milliampere current and voltage signals, and also wants to directly connect thermocouples for temperature measurement. If a separate board is needed for each type of signal, there simply wouldn't be enough space in the electrical cabinet. As a professional supplier, we recommend this high-precision module that supports mixed signal input to you, in order to enable you to flexibly handle various complex detection tasks within the limited POINT I/O space. It's better to use one board than several.
This Allen Bradley 1734-IE4CK has a high resolution, and even the slightest temperature change of the thermocouple can be sensitively detected by it, and the data transmitted to the controller is particularly smooth. The most crucial aspect is that its cold junction compensation (CJC) function is exceptionally well done. You don't need to connect additional compensation wires at the terminal block. It can calculate the influence of the ambient temperature on the thermocouple by itself, and the measured temperature value is very accurate, with almost no error compared to the on-site thermometer.
This Allen Bradley 1734-IE4CK is actually quite easy to maintain. Usually put in the cabinet, the most important thing is dustproof, don't let dust accumulate in the heat dissipation gap. Also, regularly check the connection terminals to ensure they are not loose. If they are loose, it will cause poor contact and result in fluctuating readings. If it is not used for a long time, it is recommended to unplug it and put it in an anti-static bag, then store it in a temperature-controlled and dry cabinet. The most important point is that when connecting the thermocouple, you must pay attention to the polarity. Reversing the positive and negative poles will cause the reading to deviate.
This Allen Bradley 1734-IE4CK is truly versatile. The most common applications include temperature and pressure monitoring in the food and beverage industry, temperature control of plastic extrusion machine barrels, multi-parameter collection in chemical reaction vessels, and data recording in various environmental test chambers. As long as the space is relatively compact and both temperature measurement and other analog signal measurements are required, this 1734-IE4CK is definitely the top choice. It is the sensory nerve center of the compact control system.
The 1734-IE4CK uses a removable terminal block (RTB). Each channel has three terminals: TC+, TC-, and SHLD.
Thermocouple wiring (J, K, T, E, R, S, B, N): Connect the thermocouple positive lead to TC+. Connect the negative lead to TC-. Connect the shield drain wire to SHLD. Shield must be grounded at the module end only. Polarity is critical. Reversing positive and negative causes the reading to drop or go negative.
Millivolt signal (mV): Connect positive to TC+. Connect negative to TC-. Use shielded twisted pair cable. Keep cable length under 30 meters for mV signals to avoid noise pickup.
Current signal (0-20mA or 4-20mA): Connect the positive wire to TC+. Connect the negative wire to TC-. The module provides a built-in 250Ω resistor for current measurement. No external resistor is needed. The resistor is automatically selected when current mode is configured.
Voltage signal (0-10V or ±10V): Connect the positive wire to TC+. Connect the negative wire to TC-. Input impedance is greater than 10 MΩ. This allows long cable runs without signal loading.
Field failure example: A customer in Germany connected a type K thermocouple to channel 1. The reading was 15°C higher than the actual temperature. The terminal block was clean. The thermocouple was new. After checking, the cold junction compensation was disabled in the configuration. The module was set to mV mode instead of thermocouple mode. Fix: Changed the channel configuration to type K thermocouple. The reading matched the thermometer immediately.
Thermocouples measure the temperature difference between the measurement point and the terminal block. The terminal block temperature affects the reading. The 1734-IE4CK has built-in CJC to correct this.
How it works: A temperature sensor inside the terminal block measures the local temperature. The module adds this value to the thermocouple measurement. The result is the actual temperature at the sensor tip.
CJC accuracy: ±1.0°C typical. This is sufficient for most industrial applications. For higher accuracy applications, use an isothermal terminal block or an external CJC reference.
Important: The CJC sensor is calibrated at the factory. Do not place heat sources near the terminal block. Do not mount the module above hot equipment. Heat from other devices affects the CJC reading and causes measurement errors.
The Allen Bradley 1734-IE4CK has LED indicators for power and channel status. Use this table to identify issues quickly.
Power LED (green): On when backplane power is present. Off indicates no power to the module.
Channel LED (green): On when the channel is configured and operating normally. Off indicates the channel is not configured or is disabled.
Channel LED (red): Flashing indicates an open circuit on a thermocouple input. Steady red indicates a channel error or overrange condition.
Troubleshooting guide:
If the module is not recognized by the controller: Check that the module is fully seated on the base. Check the DIN rail lock is engaged. Verify the module is added to the I/O configuration in Studio 5000.
If the thermocouple reading shows 9999 or -9999: This indicates an open circuit or broken thermocouple wire. Check the continuity of the thermocouple with a multimeter.
If the reading is unstable or fluctuating: Check the shield grounding. Ensure the shield is grounded at the module end only. Move analog cables away from motor or drive cables. Check that the terminal screws are tight.
If the reading is offset by a constant value: Check the channel configuration. Verify the correct thermocouple type is selected. Check that CJC is enabled. If the offset remains, perform a calibration using a known reference.
Analog input modules can drift over time. Allen Bradley does not require field calibration for the 1734-IE4CK under normal use. However, for critical applications, periodic verification is recommended.
Verification interval: 12 months for critical processes. 24 months for general monitoring.
Verification method: Connect a known reference source to each channel. Compare the reading in the controller to the actual value. If the error exceeds 0.3% of range, calibration may be required.
Signs that maintenance is needed:The thermocouple reading changes when the terminal block is touched. This indicates poor contact or a failing CJC sensor.All channels read the same constant value regardless of actual signal. This indicates a backplane communication issue.The reading drifts upward or downward over time while the signal is stable. This indicates component aging.What to do if maintenance is needed: Contact Feimu Technology with the module serial number and a description of the issue. We can provide calibration assistance or arrange a replacement if necessary.
Feimu Technology operates from Jiangmen City, Guangdong Province, China. The company was founded in 2005 and has supplied automation components to customers in over 30 countries.
Years in operation: 20 years as of 2025.
Warehouse: 2000+ square meters. Temperature controlled. Humidity monitored.
Inventory: 5000+ active SKUs including Allen Bradley PLCs, POINT I/O modules, PanelView HMIs, and servo drives.
Brands carried: Allen Bradley, Siemens, GE, Schneider.
Export markets: 30+ countries across Europe, North America, South America, Middle East, and Southeast Asia.
Testing: Each 1734-IE4CK module receives a power-on test. All 4 channels are verified with standard signal sources. Thermocouple types J and K are tested. Cold junction compensation is validated against a reference thermometer. Factory reset is performed to clear previous configurations.
Warranty: 12 months from shipment date. Covers manufacturing defects and component failure. Does not cover wiring errors, water damage, or physical impact.
Contact information:
Email: sales@feimutech.com
WhatsApp: +86 13358323579
Website: www.feimuplc.com
Response time: Within 24 hours. Technical questions typically answered within 12 hours. Please include your module serial number and a description of the issue when contacting.
Address
No. 26, Yuhu Street, Encheng Subdistrict, Enping City, Jiangmen City, Guangdong Province, China
Tel
