Specifications

Level One: Protege GX Installer Study Guide | August 2013 157
If the integrity of the RS-485 Module Network is critical, then an intelligent reader expander with an isolated
secondary module network can be used.
Cabinet
ZX16 RDI2
PSU Controller
Primary RS-485 Secondary RS-485
Keypad
Now if the cable outside the cabinet gets cut, it will only affect the keypad.
*Alternatively, a 3rd party RS-485 LAN isolator can be used.
Utilizing Ethernet
Another option for a robust system design is to use Ethernet.
Although an ethernet cable can still be cut or damaged, it is much less likely to affect the rest of the network.
Cabinet
ZX16 RDM2
PSU Controller
TLCD
LAN
 The Controller connects to the network using ethernet.
 The RS-485 Module Network and expanders are protected inside the cabinet, and a TLCD touchscreen is
used for arming and disarming the system.
Not only does the TLCD offer more functionality for the end user, it also protects the RS-485 module network by
being completely isolated.