Related Manuals for Shield LH-DCM-M
Summary of Contents for Shield LH-DCM-M
- Page 1 Shield Digital Control Module (DCM) Installation Manual Shield Fire, Safety and Security Ltd Page 1 of 14 Revision DCM01.01 Shield Digital Control Module Installation Manual...
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Page 2: Table Of Contents
Page 8 Commissioning Page 9-11 Self Test Page 12 Two-wire RS-485 Modbus RTU/ASCII Communications Page 13 Resetting the Shield DCM Unit Page 14 Shield Fire, Safety and Security Ltd Page 2 of 14 Revision DCM01.01 Shield Digital Control Module Installation Manual... -
Page 3: Important Guidelines - Read Before Commencing Installation
Ensure the product is installed, commissioned and maintained by persons according to good engineering practices and who have received sufficient training on the unit. Only use Shield Digital Linear Heat Detection (LHD) cable. Test the LHD Cable before connecting it to the DCM using a multimeter. -
Page 4: General Description
The Shield Digital Control Module (DCM) is a dual zone module for fault output are provided for each zone. The unit is intended to be installed monitoring up to two zones of Shield Digital LHD Cable. If an overheat or between the Digital LHD cable and a conventional or addressable fire fire situation triggers either zone of the cable the unit automatically alarm control panel. -
Page 5: Specifications
(28AWG) to 4mm (11AWG) Supervised Circuits: Power, Input Zone 1 & Input Zone 2 Inputs: Up to two Class B zones of Shield Digital LHD Cable ...Max Zone Length 3000m (10,000ft) ...Min Zone Length ...End of line resistor 1kohm (included) ...Short circuit current... -
Page 6: Leader Cable
Leader Cable Mounting Dimensions The Shield DCM can be connected via leader cable to the start of the Digital LHD cable. During installation the voltage drop across the leader cable is calibrated out to give an accurate distance reading when an... -
Page 7: Installation
The DCM allows accurate location of an alarm point along a length of Figure 3 shows the connections diagram for the DCM. The unit is Shield Digital LHD cable. It continuously monitors up to two zones of provided with a 1kohm end of line resistor in each zone input. If only one cable for a fault (open circuit) or an alarm (overheat or fi re condition). -
Page 8: Operating Modes Wiring Diagram Interlock
• The spacing between detectors should be less than 0.7 times the rated linear spacing, in accordance with National Fire Alarm Code, NFPA 72. See the Shield Digital LHD Installation Instructions for the linear spacing specifi cation. Shield Fire, Safety and Security Ltd Page 8 of 14 Revision DCM01.01... -
Page 9: Commissioning
11. If the LHD cable is connected directly to the DCM then select No and press the Set button to continue. ZONE 2 ldr cable Shield Fire, Safety and Security Ltd Page 9 of 14 Revision DCM01.01 Shield Digital Control Module Installation Manual... - Page 10 Zone 1 : 534 m distance along the cable to the trigger point and first displays this value in metres. Zone 2: OK Shield Fire, Safety and Security Ltd Page 10 of 14 Revision DCM01.01 Shield Digital Control Module Installation Manual...
- Page 11 An open circuit will be displayed as fault (as per zone 1 shown Zone 2: GND FAUL T right). A ground fault will be shown as ‘gnd flt” (as per 2 shown right). Shield Fire, Safety and Security Ltd Page 11 of 14 Revision DCM01.01...
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Page 12: Self Test
To exit self test mode, press and hold Zone 2: FAUL T both SET and SELECT buttons for 10s or more until the device resets. Shield Fire, Safety and Security Ltd Page 12 of 14 Revision DCM01.01... -
Page 13: Two-Wire Rs-485 Modbus Rtu/Ascii Communications
Two-wire RS-485 Modbus RTU/ASCII Communications The Shield DCM includes a two wire RS-485 Modbus output which can be enabled to output the status of each zone of Digital LHD Cable. The DCM Modbus output supports the Modbus RTU/ ASCII protocol and the following functions: •... -
Page 14: Resetting The Shield Dcm Unit
Modbus setup will all require selecting after this procedure. To reset the Shield DCM unit back to the factory state, when the unit is powered up and in normal operation (see step 15 in the Commissioning procedure), press and hold the SET and SELECT buttons for a minimum of 10 seconds continuously.
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