DEIF Delomatic 3 AOM: Engineering Guide for Analog Output Modules

Power Management System (PMS): In a multi machine parallel system, load distribution instructions (power or reactive setting values) are sent to each unit controller through AOM to achieve balanced distribution of active and reactive power.

Process control valve positioning: In auxiliary systems such as fuel viscosity control and cooling water temperature regulation, AOM can directly drive 4-20mA electric pneumatic positioners or electric actuators.

2. Installation and configuration precautions

Jumper setting: Before installing the module, it is necessary to configure the signal type and polarity of each channel using PCB board jumpers according to the design drawings. If changes are required, the module power must be cut off.

Cable selection and shielding: Analog signals are sensitive to interference, and it is recommended to use twisted pair shielded cables. The shielding layer should be grounded at a single point at the receiving end (actuator side) or treated according to the system grounding specifications. The wiring terminals of AOM support a wire diameter of 2.5mm ², which is sufficient to accommodate standard instrument cables with shielding layers.

Handling of common terminals within a group: The common terminals within the same group (4 channels) are already connected within the module. When wiring externally, it is important to note that the common circuits of all loads within the group must be connected to the common terminal of that group. It is not allowed to mix the common terminals of different groups, otherwise it will damage electrical isolation.

Load matching verification: Before debugging, use a multimeter to measure the resistance of the load connected to each channel, ensuring that the load is ≤ 500 Ω in current output mode and ≥ 500 Ω in voltage output mode, to avoid output distortion or module overload caused by load mismatch.

3. Common problems in troubleshooting

Output always at 0: Check if the system power supply is normal, if the AOM module is securely inserted into the rack, and if there are bent pins on the backplane connector.

Excessive or fluctuating output deviation: Check if the system grounding is good and if the cable shielding is reliable; Verify whether the load resistance is within the allowable range; Check if the configuration jumper is consistent with the software settings (such as software configured for unipolar but hardware jumper for bipolar).

A certain channel has no output: first check if the jumper of that channel is missing or has poor contact, and then check if the external wiring is open. If the problem persists, you can try moving the load of this channel to other normal channels in the same group for cross testing to determine whether it is a module hardware failure or an external load failure.