CMU100 ATC | Alldatasheet

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Technical content

CURRENT MONITORS CMU100 Series Multifunction AC Current Monitoring Relay

  • It is used to monitor the value of alternating current, e.g.: motors, heating cables, lamps and other devices.
  • Power supply and monitoring circuits are not galvanically isolated.
  • Monitors current exceeding the upper current limit (Imax) and falling below the lower current limit (Imin) – according to the selected function.
  • Smooth adjustment of both current limits.
  • Adjustable time delay (to eliminate short-term current spikes).
  • Option to select functions with fault state memory (Latch).
  • Measures true root mean square value of the current - TRUE RMS.
  • Possibility to extend the current range using an external current transformer. SPECIFICATIONS

DESCRIPTION

PART NO. DESCRIPTION CMU100USD2 2A DIN rail mounted Multifunction Current Monitoring Relay CMU100USD5 5A DIN rail mounted Multifunction Current Monitoring Relay

ORDERING INFORMATION

  • Over Current, Under Current, and Window Monitoring
  • Universal Supply Voltage
  • Slim, Space-saving Design
  • DIN Rail Mount
  • Automatic and Manual Resets SUPPLY SUPPLY TERMINALS A1 - A2 VOLTAGE RANGE AC/DC 24-240V (AC 50-60 Hz) POWER INPUT (MAX) 3.8VA/0.7W SUPPLY VOLTAGE TOLERANCE –15%; +10% MEASURING CIRCUIT CURRENT RANGE CMU100USD2 | In - 2A CMU100USD5 | In - 5A (AC 50-60Hz) MAX CONTINUOUS CURRENT OVERLOAD CMU100USD2 | 4A CMU100USD5 | 10A PEAK OVERLOAD (1s) CMU100USD2 | 10A CMU100USD5 | 16A CURRENT SETTING (lmax) 10 - 100% In CURRENT SETTING (lmin) 5 - 95% In TIME DELAY (d) 300ms TIME DELAY (t) Adjustable, 0.5-10s ACCURACY SETTING ACCURACY (MECH) 5% REPEATABLE ACCURACY <1% TEMPERATURE DEPENDENCY <0.1%/°C LIMIT VALUES TOLERANCE 5% HYSTERESIS (FAULT TO OK) 5% (function O1, U1, W) Imax - Imin (function O2, U2) OUTPUT NUMBER OF CONTACTS 1 CONTACT FORM SPDT CURRENT RATING OUTPUT (55°C) 13A/AC1 or 13A General Purpose at 250VAC OUTPUT (40°C) Pilot Duty B300 OUTPUT (40°C, N/O ONLY) 1HP at 240VAC, 1/2HP at 120VAC BREAKING CAPACITY 4000VA/AC1, 384W/DC1 SWITCHING VOLTAGE 250VAC / 24VDC POWER DISSIPATION (MAX) 1.2W MECHANICAL LIFE 10,000,000 ops. ELECTRICAL LIFE (AC1) 100,000 ops. OTHER INFORMATION OPERATING TEMPERATURE -20 to +55°C (-4°F to 131°F) STORAGE TEMPERATURE -30 to +70°C (-22°F to 158°F) OPERATING POSITION Any DIELECTRIC STRENGTH 4kV AC (supply - output) MOUNTING DIN rail EN 60715 PROTECTION DEGREE IP40 front panel / IP20 terminals OVERVOLTAGE CATEGORY III POLLUTION DEGREE 2 MAX CABLE SIZE (MM2) solid wire max. 1x 2.5 or 2 x 1.5 with sleeve max. 1 x 2.5 (AWG 14) DIMENSIONS 90 x 17.6 x 64mm 3.5˝ x 0.7˝ x 2.5˝ WEIGHT 60g (2.15oz) STANDARDS EN 60255-1, EN60255-26, EN60255-27 Supply voltage terminals (A1-A2) Monitored current terminals (A1-B1) Supply voltage indication Function setting Current level setting (lmax) Indication of operating status Time delay setting Output contact (15-16-18) Current level setting (lmin) IND. CONT . EQ. 496Y

Diversified Electronics 800.727.5646 atcdiversified.com CURRENT MONITORS CMU100 Series Diversified Electronics 800.727.5646 atcdiversified.com DIMENSIONSTERMINAL CONNECTIONS O1. OVER (hysteresis 5%) FUNCTIONS U1. UNDER (hysteresis 5%) W. WINDOW (hysteresis 5%) OVER:

  • If the amount of the monitored current is lower than the set limit Imax the output contact is closed. If the Imax is exceeded, the output con- tact will open after the set delay (fault state).
  • If the current falls below the fixed hysteresis (function O1) or the set lower limit (function O2), the output contact will close again.
  • If the OL function (OVER + Latch) is selected, when the current Imax is exceeded, the output contact remains open even when the current returns from the fault state. Fault memory reset can be done in two ways:
  • Short-term interruption of supply voltage.
  • By setting the function switch to position R (RESET) or any function without memory fault. The RESET state lasts for 3 s after switching the function switch from the R position to a function with memory fault (UL, OL, WL). When moving to any other function from the R position, this delay does not apply. UNDER:
  • If the amount of the monitored current is higher than the set limit Imin the output contact is closed. When the current drops below the Imin, output contact opens after the set delay (fault state).
  • If the current exceeds the fixed hysteresis (func tion U1) or the set upper limit (function U2), the output contact closes again.
  • If the UL function (UNDER + Latch) is selected, when the current drops below Imin, the output contact remains open even when returning from the fault state. Fault memory reset can be done as in the previous case. WINDOW:
  • If the amount of the monitored current is lower than Imax and at the same time higher than Imin, the output contact is closed. If the Imax is exceeded or drops below the Imin, output contact opens after the set delay (fault state).
  • To return from the fault state, a fixed hysteresis is applied.
  • If the WL function (WINDOW + Latch) is se- lected, the fault state is stored in memory again even when returning from the fault state. Fault memory reset can be done as in the previous cases. O2. OVER (hysteresis to lmin) OL. OVER + Latch U2. UNDER (hysteresis to lmin) UL. UNDER + Latch WL. WINDOW + Latch Graphs Legend: t = time delay to fault state d = delay 0.3s after connecting power supply (Un) INDICATION OF OPERATING STATES 3.5 [90mm] 1.4 [35mm] 2.5 [64mm] 0.7 [17.6mm] 2.4 [61mm]