We recently had an enquiry from a customer running a single high-level DC signal — a 4-20mA transmitter output — that needed to feed two separate systems at the same time: one for control, one for a separate alarm or recorder. Splitting a loop like that isn’t as simple as wiring the signal to two inputs. You risk loading down the loop, and if the two downstream systems don’t share a common ground, you can end up with noise or even damage from ground loop currents.
This is where the MTT MS3104 terminal block signal conditioner comes in. It isn’t just a distributor — it’s a signal isolator with two completely independent, isolated DC outputs from a single DC current or voltage input. Full isolation between the input, both outputs, and the power supply means each connected device sees a clean signal, with no shared ground path to pick up noise or carry a fault back into the loop.
In actual application, panel power isn’t always 24V DC. Some panels only have 100-240V AC mains, others run on 110V DC control power. The MS3104 covers all of these — AC or DC, including a 12V DC option — so you’re not forced to add a separate power supply just for one signal conditioner. There’s also a fast-response /K option if your loop needs a quicker 10ms response instead of the standard 85ms, useful for fast trip or alarm signals.
Before we quote a signal conditioner like this, we would normally check: the input signal type and range (current or voltage), what output range each downstream device needs on Output 1 and Output 2, the panel’s available power supply (AC or DC, and voltage), whether standard or fast /K response is required, and the DIN-rail space available (it’s a compact 49.8mm wide unit). Send us these details and we can confirm the right variant before you order. Hope this helps.
