User's Manual

905U-D Radio Modem Module User Manual
Page 12 © May 2000
Chapter Two INSTALLATION
2.1 General
The 905U-D module is housed in an rugged aluminium case, suitable for DIN-rail mounting.
Terminals will accept wires up to 2.5 sqmm in size.
Normal 110-240V mains supply should not be connected to any terminal of the 905U-D
module. Refer to Section 2.3 Power Supply.
Before installing a new system, it is preferable to bench test the complete system.
Configuration problems are easier to recognise when the system units are adjacent.
The foldout sheet 905U-D Installation Guide provides an installation drawing appropriate to
most applications. Further information is detailed below.
Each 905U-D module should be effectively earthed via the "GND" terminal on the 905U-D
module - this is to ensure that the surge protection circuits inside the 905U-D module are
effective.