DEIF Delomatic 3 AOM: Engineering Guide for Analog Output Modules

Signal Type Current output or Voltage output Current signal (4-20mA) has better anti-interference ability and long-distance transmission characteristics; Voltage signal (0-10V) suitable for high input impedance load devices

Important engineering details:

The jumper configuration is located on the PCB and needs to be set before module installation or in a power-off state. It is recommended to clarify the purpose of each channel during the design phase and keep configuration records to avoid repeated disassembly and assembly on site.

Support 'Live zero': signal ranges with starting values such as 4-20mA or 2-10V. This function is implemented through the application software of the CM module, rather than hardware jumpers, so it can be flexibly adjusted during system operation without the need to modify hardware.

2. Fault safety features

Output short circuit protection: When the channel is configured in voltage output mode, the output can withstand continuous short circuits without damage. This feature is particularly valuable in case of on-site wiring or load faults, greatly reducing the risk of module damage caused by accidental short circuits.

Output behavior during system failure: In the event of a power supply or system failure, all analog output channels will automatically reset to zero (0V/0mA), regardless of whether the channel is configured as unipolar or bipolar. This design ensures that in the event of a controller crash or power outage, the actuator can return to a safe position (such as zeroing the governor or closing the valve), reflecting the design concept of "fail safe", which is crucial for the safety of the ship's main propulsion system.

3. Load capacity

Current output mode: The maximum load resistance is 500 Ω. This means that at a 20mA output, the output voltage can reach 10V, which is sufficient to drive most current input devices in industrial sites.

Voltage output mode: The minimum load resistance is 500 Ω. When designing, it is necessary to ensure that the impedance of the connected load is not lower than this value to ensure the accuracy and driving capability of the output voltage.

Accuracy, Resolution, and Environmental Performance: The Foundation of Reliable Control

The accuracy index of the analog output module directly determines the accuracy of system regulation. The AOM module has achieved Class 1 level in these aspects and performed excellently.

1. Accuracy and temperature characteristics

Accuracy level: According to the IEC 688 standard, the accuracy of the AOM module is Class 1, which means that the comprehensive error (including linearity, repeatability, hysteresis, etc.) does not exceed ± 1% of the full scale at the reference temperature (+15 ° C~+30 ° C). This level of accuracy fully meets the engineering requirements of core control circuits such as speed regulation and voltage regulation for generator sets.

Temperature coefficient: The maximum temperature drift is 0.2%/10 ° C. This means that when the ambient temperature changes within the rated operating range (-10 ° C~+55 ° C), the output error increases by up to 0.2% for every 10 ° C increase. For environments with significant temperature fluctuations such as the cabin, this indicator ensures the module's usable accuracy across the entire temperature range.

2. Resolution

Bipolar mode: resolution of 0.4% of range. For example, at a range of ± 10V, the minimum distinguishable voltage change is approximately 80mV.

Unipolar mode: resolution of 0.2% of range. At a range of 0-20mA, the minimum distinguishable current change is approximately 40 µ A.

Output Ripple: The maximum peak to peak ripple does not exceed 1%, ensuring the smoothness of the output signal and avoiding actuator oscillation caused by signal jitter.

3. Environmental conditions and certification

Temperature range:

Reference temperature:+15 ° C~+30 ° C

Rated temperature: -10 ° C~+55 ° C

Operating temperature: -25 ° C~+70 ° C

Storage temperature: -40 ° C~+70 ° C

Climate rating: HSE rating in accordance with DIN 40040 standard, suitable for marine environments with high humidity and condensation risk.

Flame retardant rating: All plastic components meet the UL94-V0 self extinguishing rating, meeting the fire safety requirements of ships and industrial sites.

Classification Society Certification: The Delomatic 3 system has obtained comprehensive certification, including the CE mark and type approvals from LR (Lloyd's Register), GL (Germanischer Lloyd), DNV (Det Norske Veritas), ABS (American Bureau of Shipping), BV (French Classification Society), RINA (Italian Classification Society), and CNK. This means that the AOM module can be directly deployed on classified ships and offshore platforms without the need for additional equipment certification.

Engineering application and installation maintenance suggestions

1. Typical application scenarios

Generator set governor control: Connect the 4-20mA output of AOM to the fuel rack position setpoint of the electronic governor to achieve precise closed-loop control of engine speed.

Generator Voltage Regulator (AVR) Control: The excitation set value input of the AVR is driven by voltage output (0-10V) or current output, combined with the voltage regulation function of Delomatic 3, to achieve automatic adjustment of reactive power and power factor.