The MTT MS3769 Slim Plug-In Absolute Value Signal Conditioner takes a DC current or voltage signal that swings through both positive and negative polarity and converts it into a single, always-positive absolute value output. This is useful wherever a control system cares only about the magnitude of a signal and not its direction, such as monitoring vibration or AC ripple that has been rectified into a bipolar DC representation, or any measurement where a plus/minus swing needs to be folded into one consistent reading for downstream indicators or alarms.
Front-accessible trimmers allow zero and span to be adjusted on site, and an optional fast-response configuration is available for processes where the absolute value output needs to track a rapidly changing input. Dual isolated outputs let the converted signal be sent to two separate destinations from a single module, and four-way galvanic isolation between input, output, and power keeps the signal free of noise and ground-loop interference throughout.
| Input Ranges | Current -100 to 100mA (100µA-200mA span); voltage -300 to 300V (200mV-600V span) |
| Input Resistance | 1MΩ min. (voltage); 250Ω (0-20mA current) |
| Max Continuous Input | 30V DC (voltage); 40mA DC (current) |
| Output Ranges | 0-20mA current or -10 to 10V voltage; voltage span 10mV to 20V |
| Output Load | 2mA max (1V span+, voltage); 750Ω max (single 4-20mA); 550Ω (Output 1) / 350Ω (Output 2) dual |
| Adjustment | ±5% of span, zero and span, via front trimmers |
| Accuracy | Better than ±0.1% of span (at 25°C±5°C); ±0.2% of span per 10°C temperature effect |
| Response Time | 85ms max (0-90%); optional fast response 10ms max |
| CMRR | 100dB min. (500V AC, 50/60Hz) |
| Isolation | Complete isolation between input, output, power, and ground; 100MΩ min. insulation resistance @500V DC; 2000V AC dielectric strength for 1 minute |
| Power Supply | 100-240V AC (85-264V), 24V DC ±10%, or 100-240V DC (85-264V); single output 4.0VA (AC) / 1.5W (24V DC) / 2.5W (100-240V DC) |
| Dimensions | W29 x H86 x D125mm (with mounting hardware) |
| Weight | 120g (main unit) / 80g (socket) max |
| Terminals | M3.5 screw terminals, 0.8-1.0 Nm torque |
| Mounting | Wall or DIN rail mount, drop-proof screws |
| Operating Conditions | -5 to 55°C, 5-90% RH non-condensing |
| Storage Temperature | -10 to 60°C |
Frequently Asked Questions
What is the MTT MS3769 used for?
It takes a DC current or voltage signal that swings through both positive and negative polarity and converts it into a single, always-positive absolute value output. It’s useful wherever a control system cares only about the magnitude of a signal and not its direction, such as monitoring vibration or AC ripple rectified into a bipolar DC representation, or any measurement where a plus/minus swing needs to be folded into one consistent reading for downstream indicators or alarms.
What input and output signal types does it accept?
Input accepts current (-100 to 100mA) or voltage (-300 to 300V), and output is a standard 0-20mA current or -10 to 10V voltage span, single or dual. Tell us your input signal type and we can confirm the setup.
Can I fine-tune the zero and span after installation?
Yes, front-accessible trimmers give ±5% zero and span adjustment, so the output can be matched exactly to what the receiving instrument expects on site.
Is a fast-response version available?
Yes, an optional fast-response model brings response time down to 10ms max (from the standard 85ms max), useful where the bipolar signal changes quickly and the absolute value reading needs to keep pace.
How do I know if the MS3769 is right for my application?
If you have a bipolar DC signal and only need to know its magnitude, not whether it’s positive or negative, the MS3769 folds that into a single consistent reading. Send us your input signal type and whether you need the standard or fast-response model, and we can confirm before you order.
Download MTT MS3769 Slim Plug-In Absolute Value Signal Conditioner information here
Spec Sheet: MTT_SpecSheet1_MS3769_Rev130_E
Manual: MTT_Manual1_MS3769_Rev110_E
