iNS/iDS 2-Wire System Manual
350-077
Rev. D - 1/20/2021
Page 64 of 107
10.6
Advanced Communications Settings
All iNS2 PBSs connected to the interconnect board communicate with the iCCU-X2 via the field wires, using one of three
communication channels A, B or C.
During initial startup, the iCCU-X2 will operate in Channel B by default. The first time an iNS2 PBS powers up, it will auto-
calibrate by finding the communication channel the iCCU-X2 is operating on, and then adjust its signal until it establishes
communication with the iCCU-X2. This process typically takes 1-3 minutes. Once calibrated, each iNS2 will save its
communications settings in non-
volatile memory and use them during any subsequent restart. Once a PBS’
communications settings are calibrated and it makes a successful connection to the iCCU-X2, it will flash its pilot light in a
four-flash pattern. This four-flash pattern will continue until the PBS is assigned to a phase that is receiving pedestrian
Walk, Don’t Walk or Clearance intervals.
If a calibrated PBS loses connection to the iCCU-X2 for an extended period of time or if it cannot connect to the iCCU-X2
at start up, the PBS will restart itself in come up in an un-calibrated mode. It will search for the iCCU-X2 on each of the
communication channels and calibrate itself once it locates the iCCU-X2
’s operating channel. If no iCCU-X2 is available,
the PBS will continue to search until it finds the iCCU-X2. If one or more PBSs cannot connect to the iCCU-X2 during the
calibration process (two flash pattern continues), the communication channel on the iCCU-X2 should be changed.
To change the Communications Channel of the iCCU-X2,
connect to the iCCU-X2 and use the Advanced
Communications Settings menu to select the desired channel
and press “Save”. Before changing the Communications
Channel, the iCCU-X2 will signal all connected buttons to
disconnect, restart, and recalibrate so the automatic
recalibration function will happen automatically.
Note: Channel C requires iCCU-X2 v3.91 and all iNavs must
have v4.11 or later and all iNS/iDS units must have v4.0.11 or
later. If any connected PBS has older firmware when the iCCU-
X2 is on Channel C, the units will remain in 2-flash mode and
will not establish communication with the iCCU-X2 until their
firmware is updated or the channel is changed.
If after changing Communication Channels, any of the following
issues are present: iNS2 PBSs (one or more) still cannot
connect to the iCCU-X2; an iNS2 PBS is connected but there
are communication problems when attempting to read remote
health logs (or trying to set parameters to all PBSs), please
contact Polara technical support for further assistance.
Because of the various types and states of field wiring,
communication may not work in all field wiring conditions, so
Polara cannot guarantee an iNS2 system will work on all
intersections. If the above steps fail in establishing reliable
communication between a PBS and iCCU-X2, a 3-Wire system
is the only option.
Polara recommends the use of a 12/2 IMSA 50-2 cable.
To change an iNS2 PBS to operate as an iN3 PBS (Ped-
Head Based System), please see the iN3 Quick Start Guide.
