iNS/iDS 2-Wire System Manual
350-077
Rev. D - 1/20/2021
Page 30 of 107
If using an SDLC cable to monitor Ped Intervals only:
Typically, the there are two options for load switch configurations in cabinets
using channels 9 through 12 or channels 13 through 16 for PED load
switches. Select the appropriate SDLC option based on the load switch
setup in your cabinet. Tap the save button in the upper right corner to store
the setting, then tap the back button to return to the previous screen and
proceed to Assigning iNS2 PBSs to Phases in section 5.5.
If your setup differs from one of these options, select either of the SDLC
options, tap the Save button in the upper right corner of the screen, and then
tap the Advanced Settings button at the bottom of the screen to modify the
setup for your specific needs.
If using an SDLC cable in BIU Mode (no Cable A and no Cable C):
The NEMA TS 2 2003 specification defines SDLC command and response
frames for 4 detector BIUs. The iCCU-S2 can be configured to operate as
any one of these four BIUs for the purpose of placing pedestrian calls to the
Traffic Controller. Typically, there are 4 pedestrian phases (2, 4, 6 and 8),
however the iCCU-S2 can be configured for up to 8 pedestrian phases. By
default, detector BIUs are used to places vehicle calls in the Traffic
Controller. In order to use the iCCU-S2 configured as a detector BIU, the
Traffic Controller needs to be programmed to map the vehicle call inputs to
pedestrian call inputs. The process to do this varies by Traffic Controller.
Consult your Traffic Controller manual or manufacturer for instructions on
how to do this.
Each detector BIU communicates call status for up to 16 detector inputs.
When configured as a detector BIU, the iCCU-S2 uses the first 8 detectors.
See the table below for detector input numbers and how they need to map to
pedestrian inputs.
Note: A NEMA TS 2 Traffic Controller can only communication with a single
BIU at each SDLC address. If the iCCU-S2 is configured to a BIU number
that already has a BIU device with the same number (address), then the other BIU device with the matching number
needs to be disconnected.
To configure the iCCU-S2 as a BIU, from the Cabinet Ped Interface screen, select an available detector BIU number
and the proper pedestrian load switch configuration for the cabinet. If the pedestrian load switch configuration is not
BIU#1
BIU#2
BIU#3
BIU#4
Pedestrian
Mapping
Det Input 1
Det Input 17
Det Input 33
Det Input 49
Ped Input 2
Det Input 2
Det Input 18
Det Input 34
Det Input 50
Ped Input 4
Det Input 3
Det Input 19
Det Input 35
Det Input 51
Ped Input 6
Det Input 4
Det Input 20
Det Input 36
Det Input 52
Ped Input 8
Det Input 5
Det Input 21
Det Input 37
Det Input 53
Ped Input 1
Det Input 6
Det Input 22
Det Input 38
Det Input 54
Ped Input 3
Det Input 7
Det Input 23
Det Input 39
Det Input 55
Ped Input 5
Det Input 8
Det Input 24
Det Input 40
Det Input 56
Ped Input 7
