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This is a VARIOFACE series 8-channel passive digital input interface module manufactured by Phoenix Contact. Order number: 2902894. It is specially designed for Siemens S7-300/ET 200M systems, equipped with fuse protection and signal indicator lights, and adopts knife terminal wiring mode.
- Model Code Interpretation
| Code | Meaning | Detailed Description |
| UM | Product Series | VARIOFACE Universal Interface Module |
| IC14 | Interface Type | 14-pin IC connector, compatible with Siemens ET 200M modules |
| 8DI | Channel Configuration | 8 Digital Input channels |
| F | Protection Feature | With fuse protection, 1A pluggable fuse per channel |
| LA | Indication Function | Built-in signal indicators with independent LED status display for each channel |
| S7 | System Compatibility | Developed for Siemens S7-300/ET 200M controllers, compatible with 6ES7321 series input modules |
- Core Technical Parameters
| Parameter Category | Technical Index | Remarks |
| Basic Characteristics | ||
| Order Number | 2902894 | Exclusive official part code of Phoenix Contact |
| Product Type | Passive digital input interface module | No built-in power supply, powered by controller |
| Channel Quantity | 8 channels | Independent input without mutual interference |
| Wiring Mode | Knife terminal | Suitable for 0.14-1.5mm² wires for easy wiring |
| Installation Method | NS 35/7.5 DIN rail | Standard industrial mounting, width: only 12.5mm |
| Electrical Performance | ||
| Rated Voltage | 24V DC | Compatible with wide voltage range: 19.2-26.4V DC |
| Input Type | Sink/Source universal | Supports PNP and NPN sensor signals |
| Input Current | Max. 8mA per channel | Standard current range for PLC input |
| Fuse Specification | 1A per channel, pluggable | Overcurrent protection, easy replacement |
| Response Time | ≤1ms | Fast signal acquisition |
| Insulation Grade | Functional insulation | Overvoltage Category II, Pollution Degree 2 |
| Mechanical & Environmental Parameters | ||
| Housing Material | UL94 V0 flame-retardant plastic | High safety and reliability |
| Protection Class | IP20 | Applicable for installation inside control cabinets |
| Operating Temperature | -20°C ~ +55°C | Suitable for wide-temperature industrial environments |
| Storage Temperature | -40°C ~ +85°C | Adapt to harsh storage conditions |
| Weight | Approx. 82g | Lightweight design to save installation space |
- Cross-brand Compatibility List
| Brand | Compatible Model | Applicable System | Differences |
| Siemens | 6ES7321-1BH02-0AA0 | S7-300/ET 200M | Phoenix module has fuses and indicators, original Siemens version does not |
| Siemens | 6ES7321-1BL00-0AA0 | S7-300/ET 200M | 16 channels for Siemens, 8 channels for Phoenix Contact |
| Schneider Electric | BMXDRA8040 | Modicon M340 | System incompatible, adapter required |
| ABB | DI810 | AC500 | Different interface types, conversion module needed |
| Weidmüller | UR20-14DI8/S7 | S7-300 | Spring terminals for Weidmüller, knife terminals for Phoenix Contact |
- Full UM-IC14 Series Model List
| Model | Description | Order No. | Main Features |
| UM-IC14/8DI/F/LA/S7 | 8-channel digital input with fuse and indicators | 2902894 | Standard digital input module |
| UM-IC14/8DO/F/LA/S7 | 8-channel digital output with fuse and indicators | 2902896 | Passive output, 0.8A per channel |
| UM-IC14/8R/DO/1CO/DRY/S7 | 8-channel relay output, 1 change-over dry contact | 2902891 | 10A per channel, mechanical service life: 5×10⁶ times |
| UM-IC14/8R/DO/1CO/WET/D/S7 | 8-channel relay output, 1 change-over wet contact | 2904530 | Equipped with freewheeling diode, ideal for inductive loads |
| UM-IC14/8O/DO/1NO/WET/S7 | 8-channel solid state relay output | 2902895 | 3A per channel, free of mechanical wear |
| UM-IC14/8DI/LA/S7 | 8-channel digital input with indicators only | 2902893 | No fuse protection, cost-effective |
- Common Faults & Troubleshooting Guide
| Fault Phenomenon | Possible Causes | Solutions |
| No input signal on channels | 1. Blown fuse | 1. Replace 1A fuse |
| 2. Wrong wiring | 2. Check wiring polarity and tighten terminals | |
| 3. Defective sensor | 3. Verify sensor output | |
| 4. Loose module insertion | 4. Reinstall and lock the module firmly | |
| Indicator light off while signal exists | 1. Damaged LED lamp | 1. Replace the module |
| 2. Faulty indicator circuit | 2. Inspect internal indicator circuit | |
| Simultaneous failure of multiple channels | 1. Abnormal common power supply | 1. Inspect 24V DC power supply |
| 2. Poor bus connection of the module | 2. Check IC14 connector and clean contacts | |
| Unstable signal / false triggering | 1. Electromagnetic interference | 1. Add shielding measures and reliable grounding |
| 2. Loose wiring | 2. Retighten wiring terminals | |
| 3. Power fluctuation | 3. Stabilize power supply and install filters | |
| Fuse frequently blown | 1. Excessive load current | 1. Confirm load parameters and replace matched module |
| 2. Circuit short circuit | 2. Locate and eliminate short circuit points | |
| 3. Faulty sensor | 3. Replace damaged sensors |
- Application Scenarios & Industry Cases
Applicable Scenarios
- Industrial Automation: Collect digital signals for Siemens S7-300/ET 200M systems, connect sensors, push buttons and limit switches
- Automotive Manufacturing: Monitor operating status of production line equipment, detect signals of stamping, welding and assembly stations
- Food & Beverage Industry: Position detection and status feedback for packaging and filling lines, meeting food-grade environmental requirements
- Logistics & Warehousing: Signal acquisition for stackers and conveyors in automated warehouses, adapt to frequent start-stop operation
- Water Treatment Industry: Monitor pump stations and valves, suitable for humid working environments
Non-recommended Scenarios
- Unprotected outdoor environments: IP20 rating vulnerable to dust and moisture erosion
- Severe electromagnetic interference environments: Without dedicated shielding structure, extra protection is required
- High temperature & high humidity environments: Ambient temperature over +55°C or humidity above 95% will shorten module service life
- Severe vibration and impact occasions: Standard installation without anti-vibration reinforcement design
Typical Application Cases
Case 1: Auto Parts Production Line
An auto parts manufacturer adopts this module to connect S7-300 PLC with 20 proximity switches for stamping mold position and status monitoring. The built-in fuse effectively avoids PLC damage caused by sensor short circuit; indicator lights realize rapid fault diagnosis, raising maintenance efficiency by 40%.
Case 2: Intelligent Warehousing System
An e-commerce logistics center applies this module in automated stereoscopic warehouses to connect limit switches, photoelectric sensors and safety door switches of stackers. The 8-channel design saves cabinet space; its compatibility with both PNP and NPN sensors simplifies equipment selection, achieving stable operation for 2 consecutive years.
- Air Transport Compliance & Certification Information
| Certification Type | Certificate No. | Compliance Status | Remarks |
| CE Certification | 2902894-CE | Compliant | Conform to EU Low Voltage Directive 2014/35/EU |
| RoHS Certification | 2902894-RoHS | Compliant | Meet RoHS 2.0 Standard (2011/65/EU) |
| REACH Certification | 2902894-REACH | Compliant | Free of SVHC substances |
| UL Certification | E254492 | Compliant | Comply with UL 508 industrial control equipment standard |
| Air Cargo Classification | Non-restricted goods | Compliant | No built-in lithium battery and hazardous substances |
| Shipping Standard | IATA/ICAO Compliant | Compliant | Delivered as general goods with no special restrictions |
- Selection Mnemonic
Choose UM-IC14 for S7 input modules,
8 channels with fuses and indicators available;
Knife terminals ensure fast wiring,
Phoenix Contact part number: 2902894.
Supplementary Note about 2902888
Conclusion: 2902888 is NOT a product of Phoenix Contact.
It is the Element14 distributor part number for NorComp 15-pin right-angle female D-Sub connector, original model: 174-E15-213R461.
Phoenix Contact has a similar number 2900288, which refers to PLC-BPT-230UC/21-21 relay socket, please distinguish them clearly.
- Model Code Explanation
| Code | Meaning | Detailed Description |
| 2902888 | Distributor order number | Exclusive product code of Element14 platform, not original factory model |
| 174-E15-213R461 | Original factory model | Complete model of NorComp 174-E series standard D-Sub connector |
| 174 | Series code | Basic D-Sub connector series for general industrial use |
| E | Mounting type | Right-angle mounting to save PCB space |
| 15 | Pin quantity | 15-pin high-density D-Sub layout (2 rows: 8 pins + 7 pins) |
| 213 | Core specification | 2 = Female receptacle, 13 = 0.370 inch pitch (9.40mm), R = with positioning pin for anti-misplug |
| 461 | Additional features | 4 = wired connection, 61 = standard plating (gold-plated contact area, tin-plated tail) and material configuration |
- Core Technical Parameters
| Parameter Category | Technical Index | Remarks |
| Basic Features | ||
| Connector Type | Standard D-Sub female connector, right-angle type | Comply with EIA-530 industrial standard |
| Pin Layout | 15 pins in high-density arrangement (8+7) | Standard DB-15 interface layout |
| Mounting Mode | PCB through-hole welding | 0.370 inch (9.40mm) pitch, fit for standard PCB design |
| Electrical Performance | ||
| Rated Current | 5A per pin | Max continuous current for industrial signal transmission |
| Rated Voltage | 250V AC/DC | Dielectric test voltage: 1500V AC (no breakdown within 1 minute) |
| Contact Resistance | ≤20mΩ | Initial value for low-loss signal transmission |
| Insulation Resistance | ≥1000MΩ @500V DC | Ensure reliable electrical isolation |
| Dielectric Strength | 1500V AC per minute | Conform to IEC 60664-1 standard |
| Mechanical Performance | ||
| Contact Material | Copper alloy, 30μin gold plating + tin plating | Gold-plated contact anti-oxidation, tin-plated tail easy for welding |
| Housing Material | Nickel-plated steel | Provide EMI shielding and mechanical strength |
| Mating Cycle | ≥500 times | Durable under standard operation |
| Environmental Conditions | ||
| Operating Temperature | -55°C ~ +125°C | Wide temperature range for harsh industrial environments |
| Protection Class | IP00 | Non-sealed type, used inside control cabinets |
| Humidity Range | 5% ~ 95% | Non-condensing environment, meet industrial standards |
| Weight | Approx. 12g | Lightweight without extra load on PCB |
- Cross-brand Alternative List
| Brand | Alternative Model | Applicable Scenario | Differences |
| Phoenix Contact | 2903777 (VIP-2/PT/D 9SUB/M) | Only for D-Sub connection | No 15-pin right-angle socket from Phoenix Contact, this is 9-pin module |
| Weidmüller | 1780054000 | 15-pin right-angle female D-Sub socket | Mechanically and electrically compatible, different terminal types |
| Siemens | 6ES7972-0BA12-0XA0 | Communication interface connection | Siemens is bus connector with different functions |
| Schneider Electric | BMXCPS3020 | Electrical parameter reference only | It is PLC power module instead of connector |
| Omron | XW2Z-200J-B45 | Communication cable connection | Omron product is cable assembly, not PCB socket |
- NorComp 174-E Series Full 15-pin Model List
| Model | Description | Main Features | Typical Distributor No. |
| 174-E15-213R461 | 15-pin female, right-angle, wired type | Standard version without shielding | 2902888 (inquired part number) |
| 174-E15-113R461 | 15-pin male, right-angle, wired type | Standard version without shielding | 2902887 |
| 174-E15-213R462 | 15-pin female, right-angle, wired with shield | Enhanced EMI shielding performance | 2902890 |
| 174-E15-113R462 | 15-pin male, right-angle, wired with shield | Enhanced EMI shielding performance | 2902889 |
| 174-E15-213R463 | 15-pin female, right-angle, dual-shield wired type | Double shielding for high-frequency occasions | 2902892 |
| 174-E15-113R463 | 15-pin male, right-angle, dual-shield wired type | Double shielding for high-frequency occasions | 2902891 |
| 174-E15-213R464 | 15-pin female, right-angle, high-current wired type | Rated current up to 10A per pin | 2902894 |
| 174-E15-113R464 | 15-pin male, right-angle, high-current wired type | Rated current up to 10A per pin | 2902893 |
- Common Faults & Troubleshooting
| Fault Phenomenon | Possible Causes | Solutions |
| Poor contact / signal interruption | 1. Oxidation & contamination on pins | 1. Clean contact surface with isopropyl alcohol |
| 2. Exceeded service life over 500 times | 2. Replace the connector | |
| 3. Poor welding | 3. Reweld and check welding spots | |
| Insulation failure / short circuit | 1. Dust and moisture intrusion | 1. Clean and dry the product |
| 2. Aging insulating material | 2. Replace the connector | |
| 3. Overvoltage damage | 3. Stabilize system voltage and add surge protection | |
| Mechanical damage | 1. Excessive mating force over 50N | 1. Use professional tools to control mating force |
| 2. Loosening caused by vibration & impact | 2. Reinforce installation and add anti-vibration measures | |
| 3. Deformed housing | 3. Replace housing or whole connector | |
| Poor shielding / EMI interference | 1. Disconnected shielding layer | 1. Check integrity of shielding connection |
| 2. Incorrect grounding | 2. Ensure reliable housing grounding with resistance below 1惟 | |
| Welding spot fracture | 1. Excess welding temperature | 1. Control welding temperature at 260掳C卤5掳C within 3 seconds |
| 2. Excessive mechanical stress | 2. Add stress relief measures such as heat shrink tube |
- Application Scenarios & Typical Cases
Applicable Scenarios
- Industrial Automation: PLC communication port, HMI connection, sensor signal transmission (S7-300/ET 200M system etc.)
- Medical Equipment: Data interface for monitors and analyzers (medical certified models required)
- Test & Measurement: Connection for oscilloscopes, signal generators to ensure accurate signal transmission
- Communication Equipment: Serial port connection for modems and routers, support RS-232/422/485 protocols
- Automotive Electronics: On-board diagnostic (OBD) interface, adapt to wide-temperature working environment
Non-recommended Scenarios
- Outdoor & humid environments: IP00 rating without moisture-proof design
- High-frequency high-speed transmission: Limited bandwidth not suitable for signal above 100MHz
- Severe vibration & impact occasions: Standard type without shockproof structure, reinforced version required
- Food & pharmaceutical clean workshops: Fail to meet hygiene standards, stainless steel housing type needed
Typical Application Cases
Case 1: PLC Control for Automotive Production Line
An automobile manufacturing plant uses this connector to connect S7-1200 PLC and HMI touch screen. Right-angle installation saves 30% cabinet space; gold-plated contacts guarantee long-term stable communication, realizing 3 years trouble-free operation and 50% lower maintenance cost.
Case 2: Data Acquisition for Medical Devices
A medical device manufacturer applies this connector in blood analyzers to link sensor modules and main control boards. The 15-pin design meets multi-parameter synchronous transmission demands; its wide-temperature property adapts to lab environment changes, and CE & RoHS certifications satisfy medical industry standards.
- Air Transport Compliance & Certification
| Certification Type | Certificate No. | Compliance Status | Remarks |
| CE Certification | NC-174-E15-213R461-CE | Compliant | Conform to EU Low Voltage Directive 2014/35/EU |
| RoHS Certification | NC-174-E15-213R461-RoHS | Compliant | Comply with RoHS 2.0 (2011/65/EU), lead-free and cadmium-free |
| REACH Certification | NC-174-E15-213R461-REACH | Compliant | Free of SVHC substances, conform to EU chemical regulations |
| UL Certification | E486697 | Compliant | Meet UL 1977 connector safety standard |
| Air Cargo Classification | Non-restricted goods | Compliant | No lithium battery or dangerous goods, shipped as general cargo |
| Shipping Requirement | IATA/ICAO Approved | Compliant | No special packaging needed, storage temperature: -40°C ~ +85°C |
- Selection Mnemonic
Three steps for D-Sub selection: confirm pin number 15, right-angle direction and female type;
Take electrical 5A/250V and mechanical 500 cycles into consideration, match actual working environment;
Belong to NorComp 174-E series, 2902888 is only Element14 order number.
