RC Systems ViewSmart 1600+, Руководство по эксплуатации

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UM-1097
Revision B 16
In most cases, a router and firewall will separate the network from the internet. It is not recommended
to forward ports from the internet to a ViewSmart 1600+. In cases where offsite access is needed, a VPN
or tunnel connection could be used to get inside the network.
3.4 Option Board Wiring
10-30VDC must be applied to TB3 or TB4 of all optional I/O boards.
Option boards are powered from 10-30VDC. TB4 terminals 2, 4, 6 & 8 of the standard I/O Board provide
a maximum of 500mA fused output power for powering of auxiliary external devices such as relays, lamps
or transmitters. If additional power is required, option boards may be powered directly from the optional
150W or 600W power supply.
3.4.1 Analog Input Option
In compliance with CSA C22.2 No. 152 certification, the 4-20mA input does not include or imply approval
of the LEL gas detection apparatus such as sensors, transmitters, or devices connected to the system. In
order to maintain CSA Certification of the system, all the 4-20mA gas detection instruments connected
to the input must also be CSA Certified.
Many transmitters or sensors have analog output signals and the 12 bit
Analog Input
Board, shown below,
is available to accept these. TB1 and TB2, 12 positions each, offer 3 terminals per channel for distributing
power and receiving analog inputs. These are EXC and HI / LO inputs.
When the transmitters are hi power three wire units it is recommended this power be supplied to each
option board with its own pair of wires connected directly to the DC power supply.
Precision 150 ohm 5 watt resistors (R1 – R16) between each channel’s IN LO and IN HI terminals are
termination resistors for 4-20mA inputs.
EXC and LO terminals are bussed together internally. EXC terminals are tied directly to TB3 and TB4 +24
VDC and LO terminals are tied to TB3 and TB4 power supply common. Bussing allows transmitter power
to be brought into the system at a single point (TB3 or TB4) and distributed back out at each channel’s
EXC/LO terminals to simplify field wiring. The below figure includes typical wiring to 2 and 3 wire 4-20mA
transmitters.
For configuration and setup instructions refer to Chapter 4.3.1.
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