YSI 5200 - Manual (Page 25)

YSI Incorporated 23 5200 Recirculating System Monitor
CAUTION: The sensitivity and stability of the monitor will be impaired if the monitor is not grounded.
Do not apply power to the Monitor until all electrical connections are verified and secure.
3.7 Communications Method
The 5200 has three methods of communication:
Ö RS232 TCP/IP Serial Port—to directly connect with a computer or network
Ö Modem—to communicate with a computer or pager via phone line
Ö RS485 Network—to directly connect with other 5200s
3.7.1 RS232 and TCP/IP Port
RS232 serial and TCP/IP communications are made through the TCP/IP port. This port can be
permanently connected to a PC or network for continuous monitoring applications, or to the 5201 Modem
sending alarm messages via phone. The RS232/TCP/IP port uses a standard RJ-45 connector.
Two snap on ferrite assemblies, YSI# 655361, are included with the 5200 Monitor. Wires being
connected to the communication port need to be routed through the ferrites as shown in Figure 3-9.
Failure to do so could cause catastrophic monitor failure.
RS232 PC Connection
When connecting the 5200 via the serial port to a PC for continuous operation, use an inline RS232 Opto-
Isolator device (YSI# 5285 or equivalent) to prevent ground loops. Failure to use this device may cause
incorrect DO, pH, ORP and conductivity data to be displayed and logged. Mount the isolator as close to
the PC as possible or in an area where it is protected from moisture.
Computer DB9 RS232
Serial Cable YSI 5285
Opto-Isolator RJ-45 Straight-through
Cat 5 network cable 5200 Monitor
RS232 Serial Connection to a PC
When making RS232 cable runs greater than 100 feet (30.5 meters), use an RS232 Line
Extender/Booster. Not using this device may cause communication failures. Mount the booster in an area
where it is protected from moisture.
When temporarily connecting the 5200 to a PC, a “Straight-Pinned” Dual Male RJ-45 cable and a DB-9
to RJ-45 Adapter (YSI# 655383) wired as in the chart below are required.