Page 9 of 17 Revision 1.1 Sept 2019
Document No. ProReact DSCU-EN Installation Manual
Leader Cable
In certain applications it may be desirable or necessary to use non-
sensing leader cable between the ProReact DSCU-EN unit and the
Digital LHD cable. For example, if the the DSCU-EN unit is located some
distance away from the area protected by the Digital LHD cable. This
may be required if the expected ambient temperature range, or other
environmental conditions, where the Digital LHD cable is to be used is
greater than the maximum ambient temperature range for the DSCU-EN
unit. (see steps 8, 9 and 10 in the Commissioning section on pages 10-11).
The maximum length of leader cable that can be used per zone is
dependent upon the leader cable diameter’. The following is a guideline
for typical cable sizes and maximum length:
Leader Cable Size Max Leader Cable Length
20AWG
(16x0.2mm or 0.8mm dia, copper) 1000m
Mounting Dimensions
The DSCU-EN is intended to be wall-mounted. 4 holes should be drilled
according to the mounting dimensions given in gure 2. The
corresponding mounting holes on the DSCU-EN unit can be found by
removing the lid of the device. The mounting holes are located adjacent to
the lid screw positions. Suitable screws for the type of wall the DSCU-EN
is to be mounted on will need to be provided for separately. The maximum
screw head diameter is 7mm and the maximum screw thread diameter is
4mm.
Static Discharge Cautionary
The following items are cautionary notes that will help prevent
equipment damage or malfunction caused by static discharge:
CAUTION
Static charges produce voltages high enough to damage electronic
components. Follow these precautions when installing, servicing, or
operating the DSCU-EN:
• Work in a static-free area.
• Discharge any static electricity you may have accumulated.
• Discharge static electricity by touching a known, securely
grounded object.
• Do not handle the printed circuit board (PCB) without proper
protection against static discharge.
In the event that the DSCU-EN malfunctions after encountering a static
discharge correct operation of the unit can be restored by interrupting
power to unit for a brief period (approximately 10 seconds). Setup
information can be veried by following the steps in the Commissioning
section (page 10 onwards). In the event of the setup information
being corrupted the unit should be reset following the Resetting the
DSCU-EN procedure.
Figure 2: Mounting Dimensions for the Thermocable ProReact DSCU-EN
Useful Information
