MTT MS3766H Slim Plug-In Analog Memory

The MTT MS3766H Slim Plug-In Analog Memory captures and holds a DC current or voltage output signal when triggered by an external hold command, giving control systems a way to freeze a reading during calibration, maintenance, or a brief signal interruption without letting a bad value propagate downstream. Like the standard MS3766, it releases the hold and resumes tracking the live input as soon as the hold command is cleared.

What sets the MS3766H apart is its front-panel UP and DOWN switches, which let a technician manually nudge the held output value up or down once it is frozen — useful for manual-station style operation where an operator needs to bias or override a held signal on site rather than simply freezing it as-is. An adjustable output delay lets the transition into hold mode be timed to the process, and clear LED status indicators show whether the unit is tracking live, holding, or reporting a fault. As with the standard model, isolation between input, hold control, output, and power keeps the signal protected from noise and ground loops.

Input RangesCurrent -100 to 100mA (100µA-200mA span); voltage -300 to 300V (200mV-600V span)
Input Resistance1MΩ min. (voltage); 10Ω-250Ω (current, varies by range)
Max Allowable Input40mA DC (current model); 30V DC (voltage model)
Input Bias-100 to 100%
Output Ranges0-20mA (4-20mA span) or -10 to 10V (10mV-20V span); single isolated output
Output Load750Ω max (current); 2mA max (1V+ voltage spans)
Adjustment±5% of span, zero and span, via front trimmers
Held Value AdjustmentFront-panel UP/DOWN switches, 0.5% increments or continuous 0-100% sweep in approx. 20 seconds
Output DelayAdjustable 0-30s in 1s increments
AccuracyBetter than ±0.2% of span (at 25°C±5°C); ±0.2% of span per 10°C temperature effect
Response Time400ms max (0-90%, step input at 100%)
CMRR100dB min. (500V AC, 50/60Hz)
Isolation5-way isolation between input, HOLD/UP/DOWN control terminals, output, power, and ground; 100MΩ min. insulation resistance @500V DC; 2000V AC dielectric strength (1 minute), 500V AC (output to control terminals)
Power Supply100-240V AC (85-264V, 47-63Hz), 24V DC ±10%, or 100-240V DC (85-264V); 6.5VA max (AC) / 1.8W max (24V DC) / 7.2W max (DC)
DimensionsW29 x H86 x D125mm (including mounting screw and socket)
Weight130g (main unit) / 80g (socket) max
TerminalsM3.5 screw terminal, 0.8-1.0 Nm torque
MountingWall or DIN rail mount
Operating Conditions-5 to 55°C, 5-90% RH non-condensing
Storage Temperature-10 to 60°C
Additional FeaturesLED status indicators (green normal, blinking green hold, red error); hold status can be configured without power

Download MTT MS3766H Slim Plug-In Analog Memory information here

Datasheet: MTT_SpecSheet1_MS3766H_Rev16_E

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