Installation Manual

Installation Manual LF RFID Interrogator HTRM1100

froschelectronics GmbH Rev 1.2 - Feb 2021 Page 8 of 11
The module must be mounted into a cabinet or housing. The enclosure must be at least IP22
rated when used indoors and IP44 rated when the unit is intended to be operated outdoors. If
screwing is necessary in order to fix the module 4 spacers of thread size M3mm (UNC 4-40
or 6-32) must be used.
Figure 2: Mounting holes of the module
Use spacer bolts of minimum length 7mm (9/32 in) for mounting. If screwing leads to a
conducting connection to a metal mounting plate, the plate must be grounded to
potential earth.
6.4 POWER SUPPLY
The reader module works with supplies from 12V to 18V DC. The module needs to
be grounded. Only use supplies in accordance with 7 HTRM1100 Product Specification. The
power rating of the supply must be P=25W at the minimum. Only use FCC certified supplies.
Note: The communication range of the system depends as well on the supply voltage.
Maximum reading distance is achieved with the maximum supply voltage of 18 VDC.
Connect the supply a shown in Figure 3. If V- of the used supply is electrically identical with
the potential earth, the connection of potential earth can be omitted.
Figure 3: Connecting power supply to HTRM1100