CMD Series

CMD10AD2U

Lead Time: In Stock

$177.10 (USD) / EACH

Description Of Function

Overcurrent Monitoring (OVER, OVER+LATCH):

When the monitored current exceeds the value adjusted at the MAX-dial, the tripping delay (DELAY) begins (red LED MAX flashes). After the tripping delay (DELAY) has expired (red LED MAX illuminated), the output relays switch into off-position (yellow LED RELAY not illuminated). The output relays again switch into on-position (yellow LED illuminated), when the monitored current falls below the value adjusted at the MIN-dial (red LED MAX not illuminated).

If the fault latch is activated (OVER+LATCH) and the monitored current remains above the MAX-value longer than the tripping delay, the output relays remain in the off-position even if the monitored current falls below the value adjusted at the MIN-dial. After resetting the latch (interrupting and re-applying the control voltage), the output relays switch into on-position and a new monitoring cycle begins with the delay start-up suppression (START).

 

Undercurrent Monitoring (UNDER, UNDER+LATCH):

When the monitored current falls below the value adjusted at the MIN-dial, the tripping delay (DELAY) begins (red LED MIN flashes). After the tripping delay (DELAY) has expired (red LED MIN illuminated), the output relays switch into off-position (yellow LED not illuminated). The output relays again switch into on-position (yellow LED illuminated), when the monitored current exceeds the value adjusted at the MAX-dial.

If the fault latch is activated (UNDER+LATCH) and the monitored current remains below the MIN-value longer than the tripping delay, the output relays remain in the off-position even if the monitored current exceeds the value adjusted at the MAX-dial. After resetting the latch (interrupting and re-applying the control voltage), the output relays switch into on-position and a new monitoring cycle begins with the delay start-up suppression (START).

 

Band (Window) Function (BAND, BAND+LATCH):

The output relays switch into on-position (yellow LED RELAY illuminated) when the monitored current exceeds the value adjusted at the MIN-dial. When the monitored current exceeds the value adjusted at the MAX-dial, the tripping delay (DELAY) begins (red LED MAX flashes). After the interval has expired (red LED MAX illuminated), the output relays switch into off-position (yellow LED RELAY not illuminated). The output relays again switch into on-position (yellow LED RELAY illuminated) when the monitored current falls below the value adjusted at the MAX-dial (red LED MAX not illuminated). When the monitored current falls below the value adjusted at the MIN-dial, the tripping delay (DELAY) begins again (red LED MIN flashes). After the delay has expired (red LED MIN illuminated), the output relays switch into off-position (yellow LED not illuminated).

If the fault latch is activated (WIN+LATCH) and the monitored current remains below the MIN-value longer than the set interval of the tripping delay, the output relays remain in the off-position even if the monitored current exceeds the value adjusted at the MIN-dial. If the monitored current remains above the MAX-value longer than the set interval of the tripping delay, the output relays remain in the off-position even if the monitored current falls below the value adjusted at the
MAX-dial. After resetting the latch (interrupting and re-applying the control
voltage), the output relays switch into on-position and a new monitoring cycle begins with the delay of the start-up suppression (START).

Function Chart

cmd-function-combined-charts

Product Overview

Features
  • Monitors AC single phase and DC current
  • Overcurrent, undercurrent, band (window) modes
  • Latching output option for all functions
  • Adjustable thresholds and time delays
  • Three color LED indicators
  • 5A DPDT output
  • Universal 24-240V AC/DC control voltage range
Enclosure Style

22.5 mm wide enclosures mount on 35 mm DIN-rail

Configuration / Contact Rating
  • DPDT
  • 5A@250V AC, 5A@24V DC, B300 Pilot Duty
Application Information
  • Monitored Current Ranges: 5mA-100mA, 50mA-1A, 0.5A-10A
  • Input Voltage Tolerance:  24 to 240V DC (-20% to +25%); 24 to 240V AC (-15% to +10%)
  • Load (Burden): 4.5VA
  • Current Settings:
    Pick-up (Threshold): 10-100% ln adjustable throughout monitored current range;
    Drop-out (Hysteresis): Adjustable from 5 to 95% ln
  • Accuracy:
    Base accuracy: ≤3% (of maximum scale value);
    Frequency response: -10% to +5% (48 to 400Hz);
    Adjustment accuracy: ≤5% (of maximum scale value);
    Repetition accuracy: ≤2%;
    Temperature influence: ≤0.05% / °C
  • Maximum Allowable Current:
    Range:                     Max Current:
    5mA-100mA           800mA
    50mA-1A                 3A
    0.5A-10A                 12A
  • Recommended Trip Point Hysteresis: >= 5% (ln)
  • Response Times:\
    Pick-up <= 100 ms, Drop-out Adjustable, 0.1-10s;
    Sensing Delay on Power-up (START t): Adjustable, 0-10s         
  • Life:
    Mechanical:  20,000,000 operations
    Full Load:  200,000 operations at 1000VA resistive load.
  • Temperature: 
    Operating: -25o to 55o C (-13o to 131o F)
    Storage:  -25o to 70o C (-13o to 158o F)
  • Indicator LED: 
    Green ON: Control Voltage is applied;
    Green LED flashes: Start-up suppression delay;
    Yellow ON: Relay output ON;
    Red ON: Corresponding threshold exceeded;
    Red flashes: Tripping delay
Approvals
UL #: #E236146

Operation

Model CMD10AD2U monitors single phase AC and DC current to protect against overcurrent and undercurrent fault conditions. A band (window) function can protect equipment that is required to operate within a maximum and minimum current limit. Each function can be set to operate in latch mode.

Separate adjustment dials allow selecting the maximum threshold (MAX), minimum threshold (MIN), tripping delay (Delay), and start-up sensing delay (Start).

When the supply voltage V is applied, the output relays switch into on-position (yellow LED illuminated) and the start-up suppression (START) begins (green LED V/t flashes). Changes of the monitored current during this period do not affect the state of the output relay. After the startup suppression (START) has expired, the green LED will flash in an alternating pattern when an invalid MIN setting and MAX setting is selected (MIN must be below MAX).

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