YSI 5200A
53
YSI 5200A
52
Step 7 Wire Network
Multiple 5200A, 5X00, IOEM and REMs instruments can be networked using the
RS485 network ports. A node network consists of one master and up to 31 slaves.
On a network, the master is the point of access for the AquaManager PC software
program. In addition, the master sends all serial to ethernet device emails. Com-
munication hardware (RS232 or serial to ethernet device) is installed on the master
instrument (node) only.
RS485 network wiring can span distances up to 4000 feet (1220m). This maximum
distance (4000 ft) is for the total network distance, not the distance between net-
worked units (*see Notes below). RS485 ports are optically isolated for safety, to
reduce noise, and to help eliminate ground loops. No further isolation is required.
Network traffic refers to the constant communication between the master and all
the slaves on the network. For example, slave node 3 is configured to generate an
alarm if the temperature drops below 70°F. The master node is configured to send
alarm emails via TCP/IP using the serial to ethernet device. The master node sends
an email alarm when slave node 3 reports a temperature value below 70° F (after
alarm hold off time) to the master.
AquaManager is a valuable tool for monitoring and controlling node networks.
Notes:
-
*Use an RS485 Line Extender/Booster for distances over 4000’ (1220m).
Communication failures may occur without it. Mount the booster in an area
where it is protected from moisture.
-
Multiple networks connected to a PC via RS232 require separate PC COM
ports for simultaneous AquaManager mapping and autopolling.
-
Legacy 5200s can not be on the same network as 5200As, 5400s or 5500D-1,
5500D-2 and/or 5500D-4 instruments. However, Legacy 5200s can commu-
nicate with AquaManager and Legacy 5200 data will be stored in the same
database as 5200A, 5400, 5500D-1, 5500D-2 and 5500D-4 data.
-
Network traffic speed operates at ~ 230 KB and is not user selectable.
-
Remove network terminal strip from any networked slave that is not powered.
Network rewiring is required if a stub (*see next note) is created when a slave
is taken off the network. See valid network configuration - figure 3.28
Note:
-
*A stub is created when the last wired network terminal strip is not connected
to a network slave - figure 3.24.
Installation and Wiring
master
-represents wired network termination strip
-terminal strips located within master/slave image represent terminal strips that are physically
connected to device
-terminal strips that appear outside slave image represent terminal strips not connected to device
slave
slave
slave
slave
master
slave
slave
slave
slave
A stub is created when the last wired network terminal strip is not connected to a network slave.
Network wire stub
this is a stub
(wired terminal
strip is not physically
connected to last
physical slave on
network)
this is not a stub
(wired terminal
strip is physically
connected to last
physical slave on
network)
Figure 3.24
Directions to Wire Network
Network wiring consists of
two pairs of twisted pair cable plus a communications
common wire
. Category 5 ethernet cable is recommended. Network wires are
terminated at location
D
on I/O board - figure 3.25.
WARNING: Disconnect external power to the unit before wiring.
AVERTISSEMENT : déconnectez l’alimentation externe de l’unité avant d’effectuer
un câblage quelconque.
1. Perform steps 1 - 4 of 5200A installation and steps 5 and 6 as required
for the application.
2. Open front panel -page 40.
3. Strip five wires to terminate at network termination strip. Use appropriate
wire stripper to avoid wire nicks.
4. Feed networking cable through drilled hole in rubber grommet and to
location
D.
Terminal strip is removable.
Installation and Wiring
