Karel MS48, Installation & Maintenance Manual

Page: 10 / 70

Karel MS48 Installation & Maintenance Guide
Edition 3.2
7
Figure A-5.I Figure A-5.II
Figure A-5.III
As explained above, the DTMF circuitries exist on the MB48 motherboard, but not
on the EXP48 modules. However, when the system capacity is increased beyond
6/18, the MF receiver capacity of the MB48 motherboard - that can serve 8 ports at
a time - may be insufficient especially under heavy traffic. The MFR48 MF-Receiver
Card that comes with each EXP48 (0/16) and EXP48 (4/12) module is designed to
avoid such cases. MFR48 is to be installed on top of the MB48 motherboard when
at least one of the two expansion modules is to be used. The MFR48 card has 2
MF receiver chips and thus increments the MF receiver capacity of the system by
serving 4 extra ports at a time.
The dimensions of MB48 are 19 cm x 35 cm and the weight is 0.75 kg.
The dimensions of EXP48 (4/12) are 18.5 cm x 26 cm and the weight is 0.6 kg.
The dimensions of EXP48 (0/16) are 18.5 cm x 23 cm and the weight is 0.4 kg.
The dimensions of EXP48 (2/6) are 14.5 cm x 16.5 cm and the weight is 0.3 kg.