MTL 8507-BI-DP Signal Compatibility

Description

The MTL 8507‑BI‑DP barrier module is a robust and compact device made for safe signal transfer in industrial settings. It sits on a standard DIN‑rail and links field instruments in hazardous areas to control systems in safe areas. Its sturdy metal housing protects its electronics from dust, moisture and mechanical shock. It works without extra power supplies by using voltage from the control system backplane to feed both its internal circuits and the field side. Its design is simple yet reliable, with no moving parts and no fans. The module meets high safety standards and shows clear status information through bright green and red LEDs on its front panel. Its low profile and slim shape make it easy to fit into dense control panels without taking up much space. Each module plugs in with secure screw‑clamp terminals for field wiring and a backplane connector for the control system. This barrier module brings peace of mind to engineers who need stable, safe signal links in challenging environments.

The 8507‑BI‑DP barrier accepts a wide range of DC signal types with excellent accuracy and linearity. It handles the common 4–20 mA current loops used by pressure, temperature and flow transmitters. It also reads 0–20 mA loops and passive resistive sensors in the range of a few ohms to several kilo‑ohms. It limits energy so field devices cannot create sparks, even if a fault happens. It holds output in the safe area in strict proportion to the field current. It maintains signal linearity within 0.1 percent across its full range. It can pass steady currents up to 25 mA and tolerate brief peaks above 50 mA without damage. Its internal resistor network presents a stable load resistance to the field device and drops a fixed voltage so the transmitter sees the right conditions. If a field short or overload clears, the barrier resets in under one millisecond and restores the loop instantly. This fast recovery keeps control loops running without manual intervention. The module also keeps its temperature rise low so it can work in warm cabinets without extra cooling.

The installation and maintenance of the MTL 8507‑BI‑DP are straightforward and tool‑free. It snaps onto a 35 mm DIN‑rail with a strong spring clip that holds it firmly in place even when wires pull on the terminals. It also locks into the backplane connector with a positive latch so it cannot back out under vibration. The front panel shows two LEDs for power and two LEDs for loop status. The green power LED lights when backplane voltage is present. The green loop LED lights when the field loop is healthy. The red LED lights if a fault or overload appears. All terminals use spring‑clamp design that opens when you press a tab and closes when you let go. This makes wiring quick and secure. It works in a temperature range from –40 °C to +70 °C and stores safely from –40 °C to +85 °C. It withstands high humidity up to 95 percent without condensation. It survives mechanical shock up to 15 g and vibration up to 2 g at 10–150 Hz. Its front label shows clear markings for input, output and supply. Engineers can add or remove it without shutting down the entire rack. This barrier module gives industrial users a safe, stable and long‑lasting solution for signal compatibility between hazardous and safe areas.