Product Structure 10
In VTH15 type A/type B series, different types of digital VTH have different port positions, but
the same port provides the same function. Taking VTH1560B as an example, specific functions
of ports are introduced, as shown in Figure 2-12.
Figure 2-12
2.2.4 VTH5222CH/VTH5222CHW-2
Except different numbers of 2-wire port, VTH5222CH and VTH5222CHW-2 are the same in
other aspects. VTH5222CH has 1 group of 2-wire port, while VTH1550CHW-2 has 3 groups of
2-wire port. VTH5222CH provides 6-ch alarm input ports, 1-ch alarm output port, 1-ch RS485
port and 1 group of 2-wire port, as shown in Figure 2-13.
Figure 2-13
2.2.5 VTH1660CH
VTH1660CH provides 6-ch alarm input ports, 1-ch RS485 port, 1-ch debugging port, 1-ch
network
port
and
power
port,
as
shown
in
