20 C2655M-A (10/08)
CONNECTING RELAY DEVICES
The NET5308T-EXP supports up to four relay devices. Use them to trigger external devices. The unit supports both momentary and contin uous
relay operation, either normally open or normally closed.
You can operate the relay interactively, during an active connection, or automatically to coincide with certain events. Typical applications include
activating a door, gate, or lock, or switching on lights or other electrical devices.
When wiring the connector:
• Use 16 to 26 AWG (0.14 to 1.5 mm2) wire that is rated for 250 V or higher. The insulation must be thick enough to protect against
electrostatic discharge (ESD).
• Strip the relay control wire to 0.3 inches (7.6 mm).
• Insert the wire far enough into the connector so that the metal is not exposed.
• When using a relay with a higher load, install an external, more powerful relay.
The unit includes two 6-pin relay control terminal blocks. These blocks have tension clamps. Use a small screwdriver to open the clamp for a
particular lead. Figure 16 shows how to wire the relay control terminal block and connect it to the NET5308T-EXP.
NOTE: The terminal block is keyed. It attaches only one way to the NET5308T-EXP.
Figure 16. Relay Control Terminal Block
TableC identifies the pin assignments for the relay control terminal blocks. On the terminal block, pin 1 is the top lead (refer to Figure16).
Figure17 shows how to wire the relay with its power source to the NET5308T-EXP (refer to TableC on page 20 for the specific connector pin
assignments).
WARNING: Do not exceed the maximum ratings: 30 VDC, 2 A; 125 VAC, 0.5 A.
Table C. Relay Control Pin Assignments
Relay Pin Label Lead
1, 3 1 NO Normally Open
2C
Common
3NC
Normally Closed
2, 4 4 NO Normally Open
5C
Common
6NC
Normally Closed