Difference Voltage Transmitter HVT 400-DP

Product catalog summary

Application Scope of Use
The HVT 400-DP Failsafe Busbar Symmetry Monitor is designed for safety-critical monitoring of busbar symmetry in various processes, such as hydrogen electrolysis and battery test benches for electric vehicles. It ensures process efficiency, safety, and reliability by comparing input voltages and detecting faults through self-monitoring. The device is adaptable for multiple industries due to its flexible software configuration.

Safety Features
The device incorporates a safety-by-design approach with extensive diagnostic functions. It allows the creation of a safety loop using diagnostic relays REL3/REL4, providing two configurable safety outputs via relays REL1/REL2 or a 4-20mA analog output.

Main Benefits

Failsafe voltage monitoring
Simple software configuration via USB or Modbus
0-1500V measurement range for DC and true RMS AC
Redundant architecture
Robust design with high dielectric strength
SIL2 certification according to IEC/EN 61508
Two individual safety outputs
LED status indicators for power, error, and alarm
10-year proof test interval

Safety Properties FMEDA
The device is categorized as SIL 2, Type B, with a Hardware Fault Tolerance (HFT) of 0 and a Safe Failure Fraction (SFF) of 95%. It has a safe failure rate of 331 FIT and a dangerous failure rate of 362 FIT.

Technical Data

Measurement range: 0-1500V AC or DC
Input resistance: 12 MΩ
Analog output: 0/4-20 mA, max load 500 Ω at 22mA, accuracy <0.5%
Contact outputs: Max 62.5 VA / Max 30W, Max 125VAC/110VDC, Max 1A
Status LEDs: Power (Green), Error/SIL Alarm (Red), REL1/REL2 (Yellow)
USB Interface: USB 2.0
RS485 Interface: Baud rate 9600 bps, Device Address 1-248
Supply: 24VDC (20-30VDC), Max power consumption 1.9W
Temperature: Operating -10°C to +60°C, Storage -20°C to +70°C
Humidity: 10%-90% r.H non-condensing
Max operating altitude: <2000m above sea level
Temperature Coefficient: <0.01%/K (max), <0.005%/K (typical)
Galvanic isolation: 4.3 kV AC test voltage
Overvoltage category: CAT II: 1500V, Pollution Degree 1
PCB Material: FR4, Housing Material: Polyamide, Protection Class: IP20, Flammability: UL94 V0
Mounting type: 35mm DIN rail

Catalog excerpts

Difference Voltage Transmitter HVT 400-DP-1

w Your safe choice HVT 400-DP Failsafe Busbar Symmetry Monitor for +/- 1000 V Application Monitoring the busbar symmetry is a safety-relevant task for different processes. For instance, in hydrogen electrolysis it is crucial for optimizing the efficiency, safety, and reliability of the process, as well as for ensuring consistent and high-quality hydrogen production. Also, the device is used in battery test benches for electric vehicles. The two measurement inputs enable the comparison of input voltages and thorough self-monitoring ensures reliable detection of a fault condition. Freely configurable, fail-safe limit values are available for control system. Due to the flexible software configuration, the HVT 400 series is suitable for numerous industries and various applications. Scope of use Battery Testing High power supplies Chlorine Alkaline Electrolysis Safety Features Featuring a safety-by-design approach, the HVT 400-DP provides a wide range of diagnostic functions. In order to create a safety loop, the desired output must be evaluated in conjunction with one of the two diagnostic relays REL3/REL4. This way, two individually configurable safety outputs can be created, for which either the relays REL1/REL2 or the 4...20mA analog output are available. HVT 300-DV Shunt current Measurement HVT 300-DP Balance Voltage Measurement

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Difference Voltage Transmitter HVT 400-DP-2

w Your safe choice Main Benefits - Failsafe voltage monitoring - Simple software configuration via USB or Modbus - 0-1500V measurement range (DC and true RMS AC versions are available) - Redundant architecture - Robust design with high dielectric strength - SIL2 according to IEC/EN 61508 - Two individual safety outputs - LED status: Power, Error, Alarm - 10-year proof test interval Technical Data Safety Properties HVT 300-DV Shunt current Measurement HVT 300-DP Balance Voltage Measurement

Open the catalog to page 2

Difference Voltage Transmitter HVT 400-DP

Difference Voltage Transmitter HVT 400-DP

Catalog excerpts

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