A remote module designed for reading analog inputs in a distributed safety-related system must strictly follow IEC 61508 standard. This standard forces the choice of an appropriated degree of fault tolerance and a high coverage of dangerous failures. This paper presents the hardware architecture we developed and the necessary error detection strategies to claim a high safety integrity level (SIL 3). The module will be part of a remote station that is under production by our partner company, a Brazilian manufacturer of industrial control equipment.