Changing the State of a Relay Port
SL-280 web pages enable you to change the state of each of the relay ports .
The SL-280 relay ports have the following characteristics:
• Default state of relays 2–4 and 6–8 is NO (normally open)
• Default state of relays 1 and 5 can be NO or NC (normally closed), depending on how
they are connected to the device (see Connecting the Relay Ports on page 8
)
• Rated at 30V DC and 1A
• A non-latching relay function – the contact is left in its default state when unpowered or
in power up state. This means that if a relay is in its non-default state and power is lost,
the relay returns to its default state. To return it to its pre-power loss state, the setting
must be changed using either the web pages or a Protocol 3000 command.
To change the state of a relay, (for example, relay 2):
1. Click Relay Ports Settings on the left side of the web page (Figure 5
).
The Relay Ports Settings page appears.
Figure 14: Relay Ports Settings Page
2. In the Port section, click the number (1–8) of the relay port to be changed.
The current status of the selected relay appears.
3. Click Close/Open.
The relay changes to the selected state.
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