Chapter 2 Installing the Encoder
Cabling the Encoder
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14
Electra 9200, Rev O
To connect the Ethernet management cable(s):
n
Connect an RJ-45/UTP cable from the encoder’s back panel 10/100/1000 Mbps port to
a port on an Ethernet switch.
n
For RJ-45 pinouts, see
.
NOTE:
The network hosting the IP output traffic should be a different network from your
management network.
The 10/100 test port on the front panel is for testing use only and should not be used as a
management port.
Connecting the Fault Relay/General Purpose Interface (GPI) Ports
Fault Relay
A contact closure is a physical connection between two platforms that defines the state of the
platform as either on or off. The Electra 9200 can signal a fault through a fault relay (contact
closure) for an external device. NMX communicates with the encoder via Ethernet and does
not use this function. The fault relay port connects to a Form C relay that can switch up to
0.25 A at 30 VDC.
The encoder energizes the fault relay during normal operation. The fault condition is indicated
in the same way as the encoder's powered-off condition, which is with the relay de-energized.
You can use this method to correctly identify a power supply failure or loss of input power.
The signals are normally open or normally closed.
NOTE:
Any alarm causes the fault relay to change to the fault state. When multiple alarms
accumulate, all alarms must be active for the relay state to change.
GPI Ports
(RN-05)
The GPI ports can be used for DPI input to the Electra 9200 and Ion-based encoders when a
contact closure is created. There are four GPI contacts. Each is independent and can be
provisioned to any one channel and multiple available channels.
To activate a contact closure:
1.
Insert the individual wires needed into the contacts:
The first three ports are for fault relay, while the inputs labeled 1 through 4 are GPI ports.
2.
Ground the wires to the ground pin (the last pin on the right) to activate a contact closure.
When configured in the DPI properties page of NMX, an SCTE35 message is sent out
when that pin is set to low.
Figure 2–4: Fault Relay/GPI Ports
For Fault Relay and GPI pinouts, see
