VACON CX Modbus user’s manual Page 4
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2. SPECIFICATIONS
Modbus - Interface 9-pin DSUB connector (female)
connections Transfer method RS-485, Half duplex
Transfer cable Twisted pair (1 pair and shield)
Electrical isolation 500 V DC
I/O -control Digital input (4 pcs) 24 V: “0” ≤10 V, “1” ≥18 V, R
i
= 5 kΩ
connections Digital output (4 pcs) Open collector output, 50 mA/48 V
Termistor input (1 pcs) R
trip
= 4.7 kΩ
Encoder input (3 pcs) 24 V: “0” ≤10 V, “1” ≥18 V, R
i
= 3.3 kΩ
5 V : “0” ≤2 V, “1” ≥3 V, R
i
= 330 Ω
Aux. voltage 24 V (±20%), max 50 mA
Safety Fulfills EN50178 standard
Table 2-1. Specifications
Communication mode RTU
Function codes 1
2
3
4
5
6
8
Broadcast (codes 5,6)
Read Digital Output
Read Digital Input
Read Holding Register
Read Input Register
Write Single Digital Output
Write Single Register
Diagnostic
Communication parameters
- Address
- Parity
- Stop Bits
- Baud Rate
1 to 247
None, Odd or Even
1
300 to 19200 Baud
Table 2-2. Modbus communication data