
Manual 26247
2301D/2301D-EC Digital Control
Woodward
23
Termination
For RS-422, termination should be located at the receiver when one or more
transmitters are connected to a single receiver. When a single transmitter is
connected to one or more receiver, termination should be at the receiver farthest
from the transmitter. Figure 2-5 is an example.
Figure 2-5. RS-422 Terminator Locations
Grounding and Shielding
The RS-422 specifications state that a ground wire is needed if there is no other
ground path between units. The preferred method to do this is to include a
separate wire in the cable that connects the circuit grounds together. Connect the
shield to earth ground at one point only. The alternate way is to connect all circuit
grounds to the shield, and then connect the shield to earth ground at one point
only. If the latter method is used, and there are non-isolated nodes on the party
line, connect the shield to ground at a non-isolated node, not at an isolated node.
Figures 2-6 and 2-7 illustrate these cabling approaches.
Non-isolated nodes may not have a signal ground available. If signal
ground is not available, use the alternate wiring scheme in Figure 2-7
with the signal ground connection removed on those nodes only.
Содержание 2301D
Страница 12: ...2301D 2301D EC Digital Control Manual 26247 4 Woodward Figure 1 1a 2301D Outline Drawing Ordinary Locations ...
Страница 13: ...Manual 26247 2301D 2301D EC Digital Control Woodward 5 Figure 1 1b 2301D Outline Drawing Hazardous Locations ...
Страница 14: ...2301D 2301D EC Digital Control Manual 26247 6 Woodward Figure 1 2a 2301D Plant Wiring Diagram sheet 1 ...
Страница 16: ...2301D 2301D EC Digital Control Manual 26247 8 Woodward Figure 1 2c 2301D Plant Wiring Diagram notes ...
Страница 51: ...Manual 26247 2301D 2301D EC Digital Control Woodward 43 Figure 3 4 Typical Transient Response Curves ...
Страница 127: ...Manual 26247 2301D 2301D EC Digital Control Woodward 119 ...
Страница 129: ...Declarations ...