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GradeShift UDL Instruction Manual

Last updated 22/03/2018

2. Installation Manual Intro


The DualCom GradeShift is an advanced digital communication device for secure alarm reporting to an Alarm Receiving Centre (ARC) utilising the CSL Gemini Platform. Its new slim profile design is ideal for situations where there is limited space within the control equipment and simple, fast installation is required. Using Dial Capture, pin triggering, RS232 or a 485 bus, the GradeShift can be connected to a large range of alarm Control Panels or other control equipment to provide signalling in SIA, Contact ID or Fast Format for many types of applications including security systems installed to EN50136 Grade 2/3/4, PD:6662:2010 and to the Industry Agreement 1501:2015.

The GradeShift is supplied with a CSL DualCom WorldSIM® and transmits alarm signals via CSL’s Gemini Platform to an ARC via a radio, LAN or PSTN path. GradeShift monitors all of its paths continuously and reports faults to the control panel via relay outputs. In addition, Gemini continuously monitors the polling calls from the GradeShift to detect and report to the ARC total path or equipment failure in accordance with European requirements for Alarm Transmission Systems (ATS).

When a message is initiated by the changing voltage situations on GradeShift’s input terminals, Dial Capture connection or RS232/485 bus connection, the GradeShift will establish a communication to the receiving equipment. Successful communication will be indicated to the GradeShift by an acknowledgment signal from the receiving equipment, which will result in call completion and the return of the GradeShift to its quiescent condition. Where the correct acknowledgment signal is not received from the receiving equipment then the GradeShift will repeat the call process for a pre-set number of attempts on the other available paths or until the call is successfully passed to the receiving equipment. If the message cannot be successfully passed, upon request, the fault output may be programmed to operate. (See section 3.3 for relay programming.)

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