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Overview
Output RS 485 Modbus D+
D- on the CF 800 terminal block
Terminal 24 = D+ or (A)
Terminal 25 = D –or (B)
Connection to the CF
Configuring the CF meter
The CF meter must have the following Mbus parameters:
Communication speed = 2400 bauds, Mbus primary address = Required Modbus address (1- 247) (Adjustable by pushbutton
on the CF)
Default Mbus frame configured on frame 00= Challenger frame (Adjustable with the CFCS software and the optical connector)
Level 2 display Mbus speed
Configuring the Modbus card
Adjust Modbus communication speed with the micro switches
The card Modbus address is the value of the Mbus primary address of meter 1-247
R 120 ohm S4 =1
Sales references
62780 00006
Modbus card for CF800
Power supply connector (to the 2-wire CF Heat)
S4 termination resistance
S1 S2 communication speed setting switch
Only one 120 ohms resistance must be placed on
the RS485 loop
Level 2 display Mbus address
Modbus communication speed
2400 bd
4800 bd
9600 bd
19200 bd
S1
S2
1
1
0
1
1
0
0
0
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