Dover OPW SiteSentinel iSite - 2.4 The VSmart Module

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2.4 The VSmart Module
The VSmart Module is where all monitored devices (probes, sensors,
and line-leak detectors) are physically connected to the system through
Intrinsically Safe (IS) barriers. Each VSmart Module houses up to two IS
Barriers, each of which supports up to 64 peripheral devices, for a
maximum of 128 devices per module. The number of devices that can
be connected to each channel of the VSmart Module depends on the
type of device.
Consult the following table for capabilities of the VSmart Module in
connection with various peripheral devices.
VSmart Module Capacity
Maximum Per
Channel
Maximum Per
IS Barrier
Maximum Per
Module
Sensors:
16
64
128
924B Probes:
4
16
32
AST (Flex) / UST (924) /
EECO:
1
2
4
LLD Sensors:
3
12
16
Connecting multiple peripheral devices to each channel of the VSmart
Module is accomplished by making multi-drop (daisy-chain) connections.
Each type of sensor or probe that is connected to a Module is detected
via IntelliSense™ Technology.
Up to eight (8) VSmart Modules can be connected to the SiteSentinel®
iSite™ console via Petro-Net™ (twisted pair), Ethernet, or wireless
connections for a total of 1,024 devices per system.
Figure 2-7 VSmart Module
Conduit is recommended for Petro-Net™ connections between
VSmart Modules and consoles, but it is not required.
Part numbers for the barriers:
20-4344 – 12 V Barrier for VSmart 924/924B probes and standard and
multi-drop sensors (Green Label)
20-4345 – 24 V Barrier for VSmart Flex probes and EECO probes
(Orange Label)