The MTT MS3727 is a slim plug-in signal selector that switches between two DC input signals on command from a dry contact, rather than choosing automatically like a high/low comparator. Close the contact and Input 1 passes through to the output; open it and the unit switches to Input 2. That makes it a simple way to bring a manual or interlocked override into a signal path, such as switching between a live sensor and a fixed test signal, or toggling between two transmitters from a remote switch.
It accepts current or voltage inputs directly, or current signals through a shunt resistor, and switches in as little as 5ms. Like the rest of the plug-in transmitter series, the MS3727 clips into its own socket base for fast swap-out during calibration or maintenance without disturbing the field wiring, and flexible AC or DC power plus wall or DIN rail mounting make it easy to fit into an existing panel.
