ESP Zero-Fault Voltage Detector
ESP Series
Monitors N-PE zero-fault voltage, ensuring power safety for precision equipment and IT systems, preventing equipment faults from grounding anomalies.
Product Overview
The ESP Neutral-to-Earth Voltage Monitor monitors the dynamic neutral-to-earth voltage in real time, uncovering hidden hazards to ensure safe system operation. It can be widely applied to medical equipment, electronic and computer high-precision CNC machine tools, UPS power supplies, laboratories, data rooms, hospitals, R&D centers, banks, energy storage systems, military facilities and more. The product is highly integrated and very easy to install and commission on site — no complicated configuration is needed. With a dedicated gateway, only 20% of the usual workload is required.
Core Monitoring Capabilities
Real-time neutral-to-earth voltage monitoring, range 0-400V, Class 0.5 accuracy. High-precision dynamic algorithm model + error-correction algorithm, stable across various demanding scenarios. 2 DI input alarms + 1 DO relay output alarm with linkage control support. OLED display + multi-level menu for local and cloud query and management. Product Features
Data Generated
Product Features
Alarm Function
Input alarm: 2 DI input alarms; output alarm: 1 DO alarm; alarm query: view alarm information on the OLED display.
Dynamic Algorithm
Dynamic algorithm for high-precision neutral-to-earth voltage monitoring: uses a high-precision dynamic algorithm model with error-correction algorithm support, ensuring stable operation across various demanding scenarios.
Multi-Level Menu
Powerful query and management menu enabling various local and cloud applications.
Output Alarm
Output alarm status: normal or abnormal; closed or open. Output alarm control source: closed OR open output. Alarm condition logic: set commands or conditions. Output alarm control source: linkage control.
Comprehensive
Cyclic display: automatically cycles through electrical parameter screens every 10s; the module stays on the selected electrical parameter screen. Acquisition accuracy: up to ±0.5%.
Plug-and-Play Integration
The product is highly integrated and very easy to install and commission on site — no complicated configuration is needed. With a dedicated gateway, only 20% of the usual workload is required. Selection Guide
System Topology
Selection Guide
Model Naming Rules
ESP - 1 2 1 0 1 - R ESP Product Neutral-to-earth voltage monitor 1 Power supply 1=DC5V 2 Display 1=LED segment / 2=OLED 1 Wiring mode 1=neutral-to-earth wiring 0 Reserved 0=Reserved 1 Input and output 1=1 relay output and 2 digital inputs R Communication R=RS485 (Modbus) Model Power Supply Display Voltage Neutral Input Digital Input Relay Output RS485 ESP-12101-R External 5V supply OLED Supported Supported 2 1 Supported Technical Parameters
| Model | Power Supply / Display / Voltage / Neutral Input / Digital Input / Relay Output / RS485 |
| ESP-12101-R | External 5V supply / OLED / Supported / Supported / 2 / 1 / Supported |
Technical Parameters
Basic Parameters
Operating voltage DC 4.75~5.25V (5V) Power consumption ≤2W Operating temperature -20℃~60℃ Operating humidity <95% Weight 150g Dimensions 36*110*69mm (L×W×H) Enclosure material Thermoplastic material UL94V0 Protection rating IP20 Mounting method Standard 35mm DIN rail Display OLED Communication RS485 Communication protocol Modbus protocol
| Operating voltage | DC 4.75~5.25V (5V) |
| Power consumption | ≤2W |
| Operating temperature | -20℃~60℃ |
| Operating humidity | <95% |
| Weight | 150g |
| Dimensions | 36*110*69mm (L×W×H) |
| Enclosure material | Thermoplastic material UL94V0 |
| Protection rating | IP20 |
| Mounting method | Standard 35mm DIN rail |
| Display | OLED |
| Communication | RS485 |
| Communication protocol | Modbus protocol |
Monitoring Functions
Neutral-to-earth voltage Monitoring range: 0-400V; accuracy: Class 0.5/0.2s Digital input Dry contact input, built-in power supply Digital output Relay output; contact capacity: AC250V/3A, DC30V/3A; normally open contact Installation Instructions
| Neutral-to-earth voltage | Monitoring range: 0-400V; accuracy: Class 0.5/0.2s |
| Digital input | Dry contact input, built-in power supply |
| Digital output | Relay output; contact capacity: AC250V/3A, DC30V/3A; normally open contact |
Installation Instructions
a
Installation Dimensions
36mm width 110mm height 69mm depth 35mm standard DIN rail b
Terminal Description
Wiring definition Terminal Definition 5V 5V DC power input GND 0V N AC power neutral input PE Ground A RS485 A terminal B RS485 B terminal DI1 Digital input 1 (connect the other end to GND, directionless) DI2 Digital input 2 (connect the other end to GND, directionless) DO1 Output terminal (relay output, directionless) DO1' Output terminal' (relay output, directionless)
| Terminal | Definition |
| 5V | 5V DC power input |
| GND | 0V |
| N | AC power neutral input |
| PE | Ground |
| A | RS485 A terminal |
| B | RS485 B terminal |
| DI1 | Digital input 1 (connect the other end to GND, directionless) |
| DI2 | Digital input 2 (connect the other end to GND, directionless) |
| DO1 | Output terminal (relay output, directionless) |
| DO1' | Output terminal' (relay output, directionless) |
Key Points
Definition: The ESP Neutral-to-Earth Voltage Monitor is a FEXLINK electrical safety device dedicated to neutral-to-earth (N-PE) voltage monitoring. Core capabilities: Real-time monitoring of neutral-to-earth voltage amplitude with over-threshold alarming, supports RS485 upload, suitable for power quality monitoring of data rooms and precision equipment. Application scenarios: Suitable for scenarios sensitive to neutral-to-earth voltage, such as data centers, telecommunication rooms and precision manufacturing. Related products: ESA electrical safety monitoring terminal, ESE power quality monitor, SFA multi-factor measurement and control unit.
FAQ
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