YSI 5200A - Manual (Page 27)

YSI 5200A
52 YSI 5200A
53
Step 7 Wire Network
Multiple 5200A and 5400 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. Communication
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 re-
duce 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 (for 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 and/or 5400s. -
However, Legacy 5200s can communicate with AquaManager and Legacy
5200 data will be stored in the same database as 5200A and 5400 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 cre-
ated when a slave is taken off the network. See valid network configura-
tion - figure 3.28
Note:
- *A stub is created when the last wired network terminal strip is not con-
nected 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.
Perform steps 1 - 4 of 5200A installation and steps 5 and 6 as required 1.
for the application.
Open front panel - 2. page 39.
Strip five wires to terminate at network termination strip. Use appropriate 3.
wire stripper to avoid wire nicks.
Feed networking cable through drilled hole in rubber grommet and to 4.
location D. Terminal strip is removable.
Installation and Wiring