Name: Hach sc200
Brand: Hach
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Chapter 5,

Communications

• This chapter contains guidelines for communications connections.

• All ModCon75 Controllers contain two RS232 ports and an RS485.

RS232

• The RS232 serial ports are used for:

• Downloading programs from a PC by authorized MSA Service

Representative

• Communicating to the RS232 to RS485 converter, which

communicates to the Ultima X3 units.

• The RS232 interface is via RJ-11 type serial ports located on the

side of the controller.

NOTE: Turn OFF power before making communications

connections.

NOTE: Do not connect the controller directly to a telephone or

telephone line.

Figure 5-1. RS232 Port Printout

*Standard programming cables do not provide connection points

for pins 1 and 6.

5-1

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