Hach-Lange WPC-22 - Manual (Page 10)

Connect a serial device (optional)
One RS232 connection is available on the J4 connector. Connect a
printer or the serial port of a computer (COM 1 or COM 2) to the
RS232 connection to send the buffered data to a printer or a computer.
Refer to
Send the data log to a printer or computer on page 15.
If the optional RJ-45 to DB-9 converter is used, cut an RJ-45 cable and
then separate and identify the wires. Refer to
Figure 5 . Refer to Table 4
for the RS232 wiring connections.
Note: The RS232 connection is not available when the digital input (CTS pin) is
used.
Figure 5 RJ-45 to DB-9 converter wiring
1 To PC or printer 2 RJ-45 to
DB-9 converter
(SA000070-01)
3 RJ-45 cable (user
supplied)
Table 4 RS232 connections
DB-9 pin RJ-45 pin J4 pin
Pin 2 RX Pin 3 TX
Pin 3 TX Pin 4 RX
Table 4 RS232 connections (continued)
DB-9 pin RJ-45 pin J4 pin
Pin 4 DTR Pin 5 CTS
Pin 5 GND Pin 8 GND
Supply power to an external device (optional)
+5 VDC or +12 VDC is available on JP1 to supply power to an external
device. +5 VDC is supplied when the jumper is across the +5V pin and
pin 2 of JP1. +12 VDC is supplied when the jumper is across the Vps pin
and pin 2 of JP1.
Note: The V+ pin and GND pin on the J1 connector are for Service use only.
Connect units in a network (optional)
Multiple units can be connected together in a network. Use the
RS485 connection of each unit and 19 AWG, twisted shielded pair wire
to connect the units together.
Notes:
• A maximum of 32 units in a network can be connected to one
RS485 network.
• The host computer must have data acquisition software.
• The communication protocol is Modbus. Refer to the WPC Modbus
documentation on the manufacturer's website.
1. On the first unit:
a. Push the incoming cable from the RS232/RS485 converter
through a strain-relief fitting.
b. Push the outgoing cable through a strain relief fitting.
c. Connect the incoming and outgoing cable wires to the
J4 connector. Refer to Table 5 .
2. On the second unit:
a. Push the incoming cable from the first unit through a strain-relief
fitting.
b. Push the outgoing cable through a strain relief fitting.
10 English