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Current Operated Solid-State Relays

Product Description:

The ACI/MM-1 and ACI/MM-2 is a solid -state current operated relay with two user-adjustable level settings for independently monitoring starting and running currents. Each 4-turn adjustment sets the threshold of a precision comparator which trips whenever the starting or running current exceeds the setting. Two settable timers, each triggered by its own comparator, provides a 0.2 to 10 second delay in which the normal relay operation is inhibited. These delays cover the normal start time and whatever running-overload time the user needs to avoid the nuisance trips. The contact can be wired directly to the starters. The MM-1 series is used to monitor overloads and the MM-2 series is used to monitor underloads.

The switch can sense current from 1 to 200 Amps continuous, up to 1000 VAC and has 3 jumper selectable input ranges. The sensors trip point is adjustable from 1 to 200A using the four turn potentiometer. The output is a normally open or normally closed solid state relay which may be used to switch either AC or DC power. A Red LED displays the On/Off status of the switch and is standard on all sensors unless specified. Power for the MM series current sensors is induced from the conductor being monitored. All ACI/MM-1 and ACI/MM-2 series current sensors come with a 5 year unconditional warranty

The sensor is a simple, cost effective solution for monitoring motors as well as General overload vs. Time protection.
Direct connection to PC's and other control systems
Direct control light loads such as contactors, lamps and relays
Monitors motors and equipment which are subject to jamming and unusual starting or running conditions

Product Specifications:
Amperage Range 1 to 200 Amps Trip Set-Point 4 Turn Adjustable Potentiometer
Input Ranges 1-12A, 12-50A, and 50-200A Operating Range -15 to 60C
(5 to 140F)
Output Solid State Relay Sensor Hole Size 0.75" diameter
Isolation 1000 VAC MountingIntegral mounting bracket
AC: Up to 1A cont. at up to 240VAC, 50-60HZ
DC: Up to 0.15A cont., at up to 30VDC
Off State Leakage AC: with RC snubber and status LED(standard) 3.5 mA @ 120VAC; 2mA w/out
DC: N/O 1.1mA max. @ 24 VDC; No Leakage
N/C: 1.4mA max. @ 24VDC; 10uA/DCV

Ordering Information:
ACI/ [ ][ ] [ ]
MM1AC-NO (1) 1 TO 12 Running Amps ( )-Standard
MM1AC-NC (2) 12 to 50 Running Amps (NL)-Minimal Off-State Leakage
MM1DC-NO (3) 50 to 200 Running Amps

Example: ACI/MM1AC-NO-1 or ACI/MM1AC-NO-1-NL

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Last Updated 03/18/10