Endress+Hauser Proservo NMS81 Technical Information page 19

Proservo NMS81
Endress+Hauser
Ordering feature 060: "Secondary IO Digital Exd"
NMx8x - xxxx xx xx XX ...
060
Option Number of I/O modules
A1 1
A2 2
A3 3
B1 1
B2 2
B3 3
X0 0
"Modbus RS485": Technical data
No. of units Maximum 15 instruments per loop
Baud rate Selectable:
• 600 bit/s
• 1 200 bit/s
• 2 400 bit/s
• 4 800 bit/s
• 9 600 bit/s
• 19 200 bit/s
Parity Selectable:
• Odd
• Even
• None
Cable Three-wire cable with screening. The screening must be connected inside the housing.
Termination resistors To be set as required in specific environments
Topology • Serial bus
• Tree structure
Transmission distance Maximum 1 200 m (3 900 ft) including limbs or branches;
branches under 3 m (9.8 ft) are negligible
Instrument address Each transmitter has an individual bus address configured in the software of the
transmitter.
Isolation Bus inputs are electrically isolated from the other electronics.
Error on alarm Error message classified according to NAMUR NE 107
Type of I/O module
1 x "2x relay + 2x discrete I/O"
2 x "2x relay + 2x discrete I/O"
3 x "2x relay + 2x discrete I/O"
1x "Modbus RS485"
1x "Modbus RS485"
1 x "2x relay + 2x discrete I/O"
1x "Modbus RS485"
2 x "2x relay + 2x discrete I/O"
none
Number of terminals Technical data
1 x 4 →  23
2 x 4 →  23
3 x 4 →  23
1 x 4 →  19
2 x 4 →  19
→  23
3 x 4 →  19
→  23
0 -
19