Basler Electric BE1-25 - Manual (Page 42)

Contact Sensing Module
If a type T power supply (250 Vdc or 240 Vac) is used, an external Contact Sensing Module is required.
(See Figure 4-12.) If external control of condition and mode switching is also specified, the Resistor
Module must also be used in addition to the Contact Sensing Module.
The ideal mounting position for the contact-sensing module is with the fins vertical (to facilitate upward air
movement). This module is best mounted as close to the relay as is conveniently possible in order to take
full advantage of transient suppressors within the module.
Further installation information for the contact-sensing module is contained in Publication 9170206990,
which is packed with the module.
Figure 4-1. Panel Cutting/Drilling, Semi-Flush, S1 Case
4-2 BE1-25 Installation 9170200990 Rev U