The GEFRAN MD8 Extension Module adds up to eight relay or logic outputs to compatible GEFRAN alarm units.
The MD8 Extension Module is an external relay unit designed for alarm expansion on GEFRAN instruments. It is used in chemical, pharmaceutical, weighing, food processing and naval applications.
Key features include eight configurable relay outputs (NO/NC), eight logic outputs, LED indication of energized relays, and a simple three‑wire connection to the master instrument. Technical data cover power supply ranges, ambient conditions, dimensions, and compliance with IEC standards.
| Relay output type | NO/NC selectable, 5A/250Vac at cos φ=1 (3.5A at cos φ=0.4) |
|---|---|
| Logic output type | PNP 24V, 15mA max |
| Power supply | 100‑240Vac ±10% or 20‑27Vac/dc ±10%, 50/60Hz, 12VA max |
| Working temperature | 0 °C to 50 °C |
| Storage temperature | -20 °C to 70 °C |
| Humidity | 20 % to 85 % non‑condensing |
| Weight | 600 g |
| Dimensions | 96 × 96 mm (1/4 DIN), depth 152 mm |
| Faceplate protection | IP54 (IP65 optional) |
| Communication interface | Synchronous digital communication for GEFRAN instruments |
It operates from 100‑240 Vac ±10% or 20‑27 Vac/dc ±10% at 50/60 Hz, with a maximum consumption of 12 VA.
The module works between 0 °C and 50 °C, can be stored from –20 °C to 70 °C, and tolerates 20 %‑85 % non‑condensing humidity.
A simple three‑wire connection links the MD8 to the master instrument for communication and power.