The DRML1 Load Monitoring Module is designed to be plugged on top of any Nova22 Solid State Relay with Contactor configuration (PM22 and DR22 Series with options V or W) to monitor up to 8 heating elements with similar current value, with a total current ranging from 1.2 Amps up to 50 Amps.
The DRML1 module permanently measures the load current and compares it against a pre-set nominal value (TEACH value) which is stored during the installation of the module either by pressing the "Teach-In" pushbutton, placed on the front, or with the external “Teach-In” input.
The alarm output is activated when the module detects an undercurrent of 12.5% below the nominal value, which corresponds to the failure of a single load. The module can also detect other fault conditions, such as: overcurrent (current exceeding 12.5% of the nominal current), blown fuses (open load), damaged (short circuited) or interrupted SSR, and it can also detect half-wave operation.
The maximum current value (20 Amps or 50 Amps) and an adjustable alarm response delay (0.1 sec, 1 sec or 5 secs) are selectable on the front via the parameter selector switch. The alarm delay avoids fault messages generated by voltage drops.
Malfunctions are indicated by a multicolor LED, which indicates when power is ON and also when the Teach-In function is activated (Blue), when the input signal is ON (Green) and when an alarm condition is activated (Red).
The DRML1 module is ideal for monitoring the correct operation of a wide range of equipment, such as injection molding, plastic extrusion and thermoforming machines.
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