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Connect/Gateway panel guide: Digital Inputs

Overview

Module features include:

  • 16 channels.
  • LED status indicators.
  • Optical isolated inputs.
  • Dry contact triggering – voltage free open/close. 
  • Wet contact triggering – voltage applied/removed.
  • Stack mounting.

A maximum of 32 modules may be daisy chained on the RS485 bus providing a possible 512 inputs.


Wiring

Connection is made between the Nimbus Connect and the the D connector on the Digital Input Driver (RS485/RS232 Converter). This is mapped Ground to Ground, Tx to Rx, Rx to Tx as below.

 

The first 16 Channel Digital Input Module will be factory connected to the Digital Input Driver (via the RS485 bus) and sit within the same PSU enclosure. Any subsequent Digital Input Units are daisy chained on the RS485 bus and power is also connected down through the units as below.

It should be noted that all Digital Input Units on the RS485 bus require separate and unique addressing, this will be pre-configured by Nimbus for the initial supply. Further units added to an existing installation will require bespoke configuration.

Connection of Digital Inputs may be either dry (voltage free) or wet (voltage) inputs:

Dry (volt free) inputs can be either Normally Open or Normally Closed and are connected to D.GND and DI 0 to DI 15 (i.e. 16 inputs).

Wet (voltage) inputs can be Logic level 0 = 3 V or less, or Logic level 1 = 10-50 V and are connected to DI COM and DI 0 to DI 15 (i.e. 16 inputs). 



Configuration 

It should be noted that the Nimbus must be configured to recognise the number and address of each Digital Input Unit on the RS485 bus, to achieve this it is necessary to configure, connect and power the units in a specific order:

  1. Add and configure the equipment in Nimbus with protocol set as ADAM Module and assign a new Connect/Fixed Gateway, complete the remaining fields and save.

  2. Power on the Digital Input Unit.

  3. Power on the Connect/Fixed Gateway.

On initial power on, the Connect/Fixed Gateway will scan the network and register any digital input units. If any issues with this process occur, please raise a support ticket as technical support will be necessary.

Each input is defined and configured within a spreadsheet and uploaded to the Nimbus Web Portal in the same way as a fire alarm panel configuration file, download the spreadsheet template from Nimbus/Manage, complete as appropriate, then select the site and Import ToC (Table of Contents).

The following parameters are set for each input within the spreadsheet:

Module Number = Module address
Module Description = Module description/location
Input Number = Module input number
Input Description = Input description
Type = for future use
Rising Edge = Rising edge description (Alarm/Reset, Open/Close, etc.)
Falling Edge = Falling edge description (Alarm/Reset, Open/Close, etc.)
Zone Number = Zone number (grouping number)
Zone Description = Zone description/location

 

 

 

 

 

 

 

 

Testing

Once all above steps have been successfully completed, trigger an event via one of the configured inputs and verify that this passes into the event log in the Nimbus Web Portal.