ProtEX PD8-6080/PD8-6081 Explosion-Proof Modbus
®
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18
Notes:
1. Termination resistors are optional and values
depend on the cable length and characteristic
impedance. Consult the cable manufacturer
for recommendations.
2. Refer to RS-232 to RS-485 Converter
documentation for further details.
3. Use shielded cable, twisted-pairs plus ground.
Connect ground shield only at one location.
WARNING
Observe all safety regulations. Electrical wiring should be performed
in accordance with all agency requirements and applicable national,
state, and local codes to prevent damage to the meter and ensure
personnel safety.
Notes:
1. Termination resistors are optional
and values depend on the cable
length and characteristic
impedance. Consult the cable
manufacturer for recommendations.
2. Refer to RS-232 to RS-485
Converter documentation for further
details.
3. Use shielded cable, twisted-pair
plus ground. Connect ground shield
only at one location.
WARNING
Observe all safety regulations. Electrical wiring should be performed
in accordance with all agency requirements and applicable national,
state, and local codes to prevent damage to the meter and ensure
personnel safety.
When using more than one instrument in a multi-drop or multi-point mode, each meter must be provided
with its own unique address.
Figure 7: RS-485 Wiring
Figure 8: RS-485 Two-Wire Multi-Drop Wiring