Johnson Controls LN-IO -1 Series User Manual

LN Series Free Programmable LN-PRGxxx-12 Controllers Installation Instructions 15
Network Traffic Query node statistic to check errors.
Use a
LONWORKS protocol analyzer to check network traffic.
I/O Extension Module cannot communicate on the subnetwork
Absent or incorrect supply voltage 1. Check power supply voltage between 24 VAC +
15% and COM pins and
ensure it is within acceptable limits.
2. Check for tripped fuse or circuit breaker.
Overloaded Power Transformer Verify the transformer is powerful enough to supply all controllers.
Network Not Wired Properly Check that the wire connections are correct.
Absent or Incorrect Network Termination
Check the network termination(s). Only the last
LN-IOE4x0 must have the EOL
termination set to ON. When one or more LN-SVSENx-0 sensors are connected
to the controller, only the last LN-SVSENx-0 sensor must have its EOL
termination set to ON. Refer to the LN Series I/O Extension Modules
Installation Instructions (LIT-12011693).
There is another controller with the same
Subnet ID on the subnetwork.
Each I/O Extension Module on the subnetwork must have a unique Subnet ID.
Look at the Subnet ID DIP switch on the faceplate of each I/O Extension Module.
Network length
Check that the total wire length does not exceed the specifications of the
L
ONWORKS LN-Series Network Communication and Interface Guide
Technical Bulletin (LIT-12011253)
.
Wire type
Check that the total wire type agrees with the specification of the
LONWORKS
LN-Series Network Communication and Interface Guide Technical
Bulletin (LIT-12011253)
.
Hardware input is not reading the correct value.
Input Wiring Problem Check that the wiring is correct according to this manual and according to the
peripheral device's manufacturer.
Open Circuit or Short Circuit Using a voltmeter, check the voltage on the input terminal. A short circuit has a
0 V value and an open circuit has a 5 V value.
Configuration Problem Check the configuration of the input using the controller configuration plug-in or
wizard. Refer to the online help for more information.
Over Voltage or Over Current at an Input An over voltage or over current at one input can affect the reading of other inputs.
Observe the allowed voltage/current range limits for all inputs.
Hardware output is not operating correctly.
Fuse has blown (auto reset fuse) Disconnect the power and outputs terminals. Then wait a few seconds to allow
the auto-reset fuse to cool down. Check the power supply and the output wiring if
necessary.
Output Wiring Problem Check that the wiring is correct according to this manual and according to the
peripheral device's manufacturer.
Configuration Problem Using the controller configuration wizard (LN-GPI), check the configuration of the
input. Refer to the controller's user guide for more information.
0 to 10 V Output, 24 VAC Powered
Actuator is Not Moving
Check the polarity of the 24 VAC power supply connected to the actuator while
connected to the controller. Reverse the 24 VAC wire if necessary.
Wireless devices not working correctly.
Device not associated to controller Using the device configuration wizard, check the configuration of the input.
Power discharge Recharge the device with light (if solar powered) or replace the battery.
Ensure sufficient light intensity (200lx for 4 hours per day)
Device too far from the Wireless
Receiver
Reposition the device to be within the range of the Wireless Receiver. For
information on typical transmission ranges, refer to the LN Series Wireless
Solution Technical Bulletin (LIT-12011628).
Configuration Problem Check the configuration of the input using the device configuration
plug-in or wizard.
Table 5: Troubleshooting (Part 2 of 3)
Problem Solution

Johnson Controls LN-IO -1 Series Specifications

General

Brand	Johnson Controls
Model	LN-IO -1 Series
Category	Controller
Language	English