HONEYWELL 05701-A-0326 | Authorized Distributor, Same-Day Shipping Available

Description Key Technical Specifications Parameter Specification Model Number 05701-A-0326 Channels 8 differential analog inputs Input Signal Range 4-20 mA (with 250Ω resistor) or 1-5V DC Resolution 16-bit (0.0015% of span) Accuracy ±0.05% of span at 25°C Temperature Drift ±50 ppm/°C maximum Input Impedance 250Ω (current mode) / >1MΩ (voltage mode) Common Mode Voltage ±200V DC maximum Common Mode Rejection >120 dB at 60 Hz Normal Mode Rejection >60 dB at 60 Hz Isolation 1500V RMS channel-to-backplane Update Rate 50 ms typical (all channels) Power Supply 5V and 24V from backplane Power Consumption 3W typical Indicators Module status (green/red), channel activity Operating Temp 0°C to 60°C Mounting TDC 3000 I/O rack (UCN) Product Introduction The TDC 3000 racks in your plant have been running since the 90s. The HONEYWELL 05701-A-0326 is the 8-channel analog input module that’s probably in most of them. It takes 4-20 mA signals from pressure transmitters, flow meters, temperature transmitters, and level sensors—the standard instrumentation diet of any process plant. Sixteen-bit resolution gives you about 0.75 µA per step, which is overkill for most transmitters (they’re lucky to be 0.1% accurate anyway). But the real value is the isolation. 1500V channel-to-backplane means a lightning hit on a field transmitter won’t fry the controller. The module sits in the UCN (Universal Control Network) rack, talking to the NIM (Network Interface Module) and then up to the HPM (High-Performance Process Manager). When you see “comm fail” on a group of loops, it’s often this module losing its mind—either the power supply section or the comm processor on board. The 05701-A-0326 uses external 24V field supply, so if all channels read zero, check that first. The module will show green status even with no field power, just no data. Classic trap. Installation & Configuration Guide Phase 1: Pre-Installation Isolate the 24V DC field supply to the I/O rack. Lock out the breaker. The backplane power ( 5V, 24V logic) can stay live if you’re just swapping modules—UCN supports hot swap, but only if the field wiring is dead. Verify zero current on all loops connected to the 05701-A-0326. Use a clamp meter on each pair. Backup the module configuration from the HPM engineering station. Note which channels map to which PV tags. Phase 2: Removal Remove the front cover. Label all field wiring at the termination panel (usually a separate unit like the 8-channel termination panel). Take photos. The HONEYWELL 05701-A-0326 connects to the termination panel via a ribbon cable—disconnect that at the module end, not the panel end. Loosen the two captive screws at top and bottom. Pull the module straight out. Rocking it bends the backplane pins. Phase 3: Installation Inspect backplane pins. Bent pins are common—previous installers force modules in at an angle. Straighten carefully with small pliers. Slide new module in until connectors mate. Tighten captive screws finger-tight plus quarter turn. Reconnect ribbon cable to termination panel. Verify field wiring at termination panel—polarity matters for 4-20 mA loops. Phase 4: Power-On & Testing Restore 24V field power. Observe front-panel LED: steady green means OK and communicating with HPM. Flashing green means powered but not configured. Connect engineering station. Download module configuration (input ranges, filtering, alarm limits). Then check each channel: use a Fluke 789 to simulate 4 mA, 12 mA, 20 mA at the termination panel. Verify readings in HPM match within 0.1%. If a channel reads high or low, check the 250Ω resistor—some termination panels use socketed resistors that corrode. Frequently Asked Questions (FAQ) Q: Can I use 05701-A-0326 in a TPS system? Yes. TPS (TotalPlant System) is the evolution of TDC 3000. The UCN I/O is identical. The HONEYWELL 05701-A-0326 works with HPM controllers in TPS environments. Just verify your NIM (Network Interface Module) firmware supports the module revision. Some early NIMs need updates for later module revs. Q: What’s the difference between 05701-A-0326 and 05701-A-0325? The -0326 is 8-channel high-level analog input (4-20 mA, 1-5V). The -0325 is low-level analog input for thermocouples and RTDs—it has different termination panels and cold junction compensation. They’re not interchangeable. Check your existing module number carefully. Installing a -0326 where a -0325 belongs will read room temperature as 1000°C. Q: The module powers up but HPM shows “I/O Comm Fail” for this slot. What’s wrong? Three possibilities: backplane connection bad, module address wrong, or NIM sees a mismatch. Reseat the module. Check DIP switches on the module (if present) for correct node address—some revisions have address switches. Then verify NIM configuration sees a module in that slot. If NIM shows “empty” but module LED is green, backplane communication is dead. Could be the rack backplane itself. Q: Can I hot-swap this module without affecting other loops? Yes, UCN supports live insertion. But—and this matters—the field wiring stays connected. When you pull the module, those 8 loops lose input to the controller. Control loops in automatic may wind up if they don’t see PV. So the process will bump. If that’s acceptable for 2 minutes, fine. If not, plan a brief outage or put those loops in manual first. Q: One channel reads 4 mA when the input is 20 mA. Others work fine. Field wiring issue or channel damage. Swap the input at the termination panel with a working channel. If the problem moves, it’s the field wiring or transmitter. If the original channel still reads 4 mA, the module channel is dead. Common failure: input protection diode shorted. That channel is gone—replace the module if you need that loop. Q: What’s the maximum cable length from field device to module? Unlimited for 4-20 mA, within reason. The loop resistance determines max distance. The 05701-A-0326 input impedance is 250Ω. Add wire resistance (about 60Ω per 1000 ft of 18 AWG round trip). Total must stay under the transmitter’s compliance voltage. Most smart transmitters can drive 1000Ω, so you’re fine for several thousand feet. Beyond that, use a signal conditioner. Q: The module shows red LED after installation. What now? Red means hardware fault. Could be the module itself, or the rack backplane shorted. Remove all other modules from the rack except this one. If still red, module is bad. If green, one of the other modules is shorting the backplane. Add them back one by one until fault reappears—that’s your culprit. Q: Is the 05701-A-0326 still supported by Honeywell? Officially? No. TDC 3000 UCN I/O is obsolete. Honeywell stopped manufacturing these around 2015. Support contracts ended years ago. The remaining stock is new surplus—factory-sealed units sitting on shelves. If you need spares for a legacy unit, grab them now. Once they’re gone, you’re looking at third-party repairs or a full I/O upgrade. That’s a major project and a long outage. 1X00093H05 PLC EMERSON 1X00093H08 EMERSON PLC 1X00093H09 EMERSON PLC 1X00095H01 EMERSON 1X00097H01 EMERSON Email: [email protected] Phone: 86 15340683922 Sales:Wu Jiedong Our products are guaranteed for 1 year, with new and original production stopped and imported spare parts. All prices listed on the official website are subject to confirmation by contact: Wu Jiedong (manager). Our product: brand new original packaging Our warranty: All new or repaired parts have a 12 month warranty period beginning Our payment: 100% telegraphic transfer of inventory items before shipment, conditions can be proposed! If you have any downtime spare parts that you cannot find, please feel free to call or use email to contact me. 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