The GradeShift UDL is a device designed for alarm transmission and fault warning routing, primarily for fire detection and alarm systems, but also applicable to security systems. It acts as a communication link, transmitting signals from a control panel to an Alarm Receiving Centre (ARC) via various communication paths, including GPRS, PSTN, and LAN.
Function Description:
The GradeShift UDL simulates and replaces the phone line connection to a control panel's Digi-Modem, capturing alarm messages and forwarding them to the ARC via the Gemini platform. It supports alarm formats such as Fast Format, Contact ID, or SIA. The device is designed to work as a dual-path signaling device, ensuring reliable alarm transmission even if one path fails. It sends regular polling calls to the Gemini Network on all connected and active transmission paths to meet EN54-21 requirements for monitoring.
The device features multiple inputs (1-12) for receiving signals from the control equipment. Inputs 11 and 12 are specifically designed for Fire Alarm/Restore and Fault/Restore signals from the Fire Alarm Control Equipment (CIE), and can be configured for End of Line (EOL), Fully Supervised Loop (FSL), or digital detection. Inputs 1-10 can be triggered by other devices (e.g., security CIE) but will not send fire alarm/fault signals.
The GradeShift UDL also includes relay outputs: an AUX Relay for transmitting fire alarm Acknowledgment (ACK) signals to the CIE, and a Normally Closed (N/C) Fault Relay Output for transmitting fault warning signals to the CIE. The fault relay remains open in a no-fault condition and closes when power is removed, a short circuit occurs in interconnections (FSL only), an open circuit occurs (FSL and EOL), a watchdog event occurs, or there's a memory (CRC) monitoring fault. The ACK relay is normally open and closes when an acknowledgment of a Fire Alarm is received from the Gemini Platform.
Important Technical Specifications:
- Dimensions: 21 mm (h), 132 mm (w), 94 mm (d)
- Weight: 140g including NVM and SIM
- Temperature: -20C to +60C transit, -10C to +50C operating
- Humidity: 0 - 80% non-condensing
- Mounting: Any orientation
- Warranty: 5 years
- Power Requirement: 9.0V - 30.0V
- Current Consumption: Quiescent = 20 mA, Signalling = 200 mA
- Radio Path Aerial: 50 ohm (nominal) on MMCX socket
- Operation Method: Store and Forward (SIA) Pass Through (Fast Format/CID)
- CIE Interconnections: Input 'pin triggering' (Parallel) 12 channels, Analogue (Dial Capture), RS232 Serial, RS485 Bus
- RCT Protocols: Fast Format/Contact ID/SIA
- Input Terminals: Max +30V, Min 0 Vdc (reference supply 0V terminal) 100k pull-up resistor to +5V
- Low Battery: 9.8V failing, 11.0V recovery
- Fault Output: Changeover contacts (60V max, 100mA max)
- Aux Output: Normally Open contact, may be inverted (60V max, 100mA max)
- General Purpose Outputs: Four. Each switched to 0V (30V max, 100mA)
- Standards: SSP 3.4 V2 TermClass 2, EN50131-10 Grade Y, ATS Classification: EN50136 ATS5/SP3, ATS 5 parameters: D3/M4/S2/F1/A3, EN50136/EN50131-10/equipment class II
- Environmental Class: II
- Type of transmission system: Type 1 (GPRS+IP) / Type 2 (GPRS+PSTN)
- Reporting time: DP2 when installed as a Dual Path device.
Usage Features:
- Site Survey: Before installation, a CSL Signal Analyser should be used to determine sufficient base stations and signal strength for optimal aerial placement. The aerial should be installed vertically in an open space, away from metal or sources of interference (wiring, lighting, electrical installations, computers, monitors, routers, etc.). A signal test must be completed before final installation.
- Installation: The aerial must be mounted and connected, and the unit powered. The configuration file download takes 5-8 minutes, indicated by a continuously flashing Red Fault LED. A flashing Yellow Service (SVC) LED every 3-5 seconds indicates connection to the mobile network. Wiring involves connecting input triggers, the RS232/485 cable or control panel's Digi-Modem PSTN terminals, and the power supply. For Dial Capture, the Digi-Modem must have an ARC telephone number (e.g., 01) and account number (e.g., 1234) programmed.
- Test & Self Learn: The TEST/LEARN button is used to send test signals. A short tap (less than 1 second) initiates a test, with the 7-segment display (SSD) showing c1, c2, c3, A (acknowledgment from Gemini Platform) and the Yellow Communications LED indicating progress. A 3-5 second push initiates the self-learn process, displaying 'Pi'.
- Check Signals: After testing, verify with the ARC that signals are being received. For dual-path devices, ensure both paths are connected before leaving the site.
- Advanced Instructions (PSTN/LAN Enable/Disable, Fail Tests): The device allows for enabling/disabling PSTN and LAN connections through specific button sequences (P, A, B, N, L). Immediate PSTN/RADIO/LAN fail tests (10 minutes - engineer mode) can also be initiated.
- Wiring Diagrams: Detailed diagrams are provided for various connections, including pin triggering, Dial Capture, PSTN, RS232, and RS485.
- Automatic PSTN Line Learning: The GradeShift automatically learns if the PSTN line requires a '9' to dial out and saves the sequence. If the PSTN changes and no longer requires a '9', the GradeShift will revert the changes.
- Fire Specific Instructions: The device must be mounted inside the Fire Alarm Panel or a separate powered housing, meeting EN54-21 7.3 requirements. The enclosure must indicate fault and acknowledge outputs. The PSTN connection should be an analogue telephone line, supplied as 'outgoing calls only' (incoming ringing barred) and ex-directory, connected only to the GradeShift. Parallel connections with other telecoms equipment are not allowed for fire system applications. The Dial Capture interface is not to be used for fire systems as it does not provide adequate status signaling.
Maintenance Features:
- Troubleshooting: The manual provides a comprehensive troubleshooting guide for common issues, including:
- Red Fault LED continuously flashing: Indicates configuration file download; wait 5-8 minutes, ensure Yellow Service (SVC) LED is flashing.
- Repeats power-up sequence: Check power supply voltage and current, test with a known good 12V battery.
- Red Fault LED on: Refer to error codes on the SSD and the error code list.
- Dial Capture not working: Check if 'DC' is displayed, if c1, c2, c3, A are not displayed, the panel may be incompatible or configured to an unrecognized protocol. Check control panel programming and select an alternate signaling format.
- ARC not receiving messages: Check error codes on the SSD. If the fault persists, contact CSL Technical Support.
- Error Codes: A detailed list of error codes (E+) is provided, along with descriptions and recommended actions. These codes cover issues such as NVM errors, power faults, radio/GPRS faults, LAN connectivity issues, and PSTN line problems.
- Critical Errors: For critical error conditions, the GradeShift unit will beep once every 5 minutes after normal sounder beeps have timed out, alerting the user and installer.
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