Example Rs-485 System Diagram; Choose Network Type; Communications Network Comparison - bioscrypt V-Flex 4G Installation Manual

Installation Guide – October 2009 – Edit Purposes Only
Installation of locks and access controllers should be completed according to their
respective manufacturers' specifications and in accordance with all local codes. Final
connections to the device are explained in more detail in Chapter 4.
To avoid externally generated transients, do not run any wires near utility AC power
wiring, lightning rod grounding wire, etc. Grounding equipment is required for ESD
protection and safety.

2.1.6 CHOOSE NETWORK TYPE

If your installation requires the use of network communications, then the choice of
cable, the cable run length, the network topology, and the termination of the network are
important aspects that must be considered. The V-Station 4G and V-Flex 4G devices
can be networked using RS-232, RS-485, or Ethernet protocols.
The table below outlines relevant parameters of the RS-485, RS-232, and 100 baseT
Ethernet communication protocols.
Spec
Mode of
Operation
DC Isolation
Maximum
Distance
October 15 2009 – Installation Guide Draft – Edit Purposes Only
Figure 2-2 Example RS-485 System Diagram
Table 2-1 Communications Network Comparison
RS-485
Differential DC
Coupled
No
4000 feet
RS-232
Single-ended DC
Coupled
No
150 feet
2009
100BaseT
Multi
No
330 feet
Page 25