User guide
11
Wireless I/O Extender User’s Guide
PN 161-09981-007A
January 2010
Troubleshooting
I have the units setup on a bench for testing, but the Master’s status LED keeps ashing or is solid and I do not
have a carrier.
When shipped, the units are setup for a maximum transmit power. If there are only a couple feet of separation
between them, the supplied whip antenna may need to be removed. Note that this will not damage the unit.
The units are installed in the eld, but I have a ashing or solid LED on the status and no carrier.
The Master’s status LED only comes on when a response from a remote is not obtained after 3 tries, then the
Master moves on to the next Remote. A solid light indicates that the Master cannot connect to any remotes. A
blinking light indicates that the Master has lost communication with at least one remote. Most likely the issule is a
radio line-of-sight problem. If external antennas are being used, verify that they are grounded and that line of sight
exists. Also verify that the input power is OK. A UPS is recommended in areas where clean power may not exist.
If units are bench tested, and there is no communications, then you may have a mis-congured system. If the
system has been working and then fails, check for cable and antenna connections, and DC power levels.
The power LED on one or both of my units is out and I have no communication.
Try cycling power on either of the units, the resettable fuse may have tripped. If communications do not come
up again, verify that there is power to the device. The supplied wall transformer output is nominally around 16
VDC when the radio is not transmitting, and drops to 12 VDC when the transmitter is on. If the supply is okay and
cycling power does not x the problem, contact Data-Linc Group.
My analog output reads 4 mA all the time.
Verify that the connection of the transducer at the transmitter is okay. Put a milliamp meter in the loop, and verify
that the connected transducer is supplying more than 4 mA into the unit. Verify that the correct current polarity is
used.
Note: Data-Linc Group unit does not supply loop power on the inputs.
My analog output is 0 or below 4 mA.
Contact Data-Linc Group. The analog output has been damaged or failed. This is a hardware problem.
The discrete output will not activate my relay.
The discrete output of the PLR580D or PLR580DA does not supply power for a relay coil. Refer to the open
collector diagram for connections.
My relay switches on and off constantly.
Verify that the Master’s status LED does not light. The status LED refers to loss of RF communication data
stream. Make sure the relay coil does not require more than 100 mA. The discrete outputs can only sink 100 mA.
The relay never switches.
Verify that the switch on the input side is wired properly to the Wireless I/O Extender. Check the discrete output
with a multimeter. Set the meter for continuity and place the “+” lead on the “G” or common terminal and “-” on the
correct discrete output.