Karel MS48IP, Technical Reference And Installation Manual

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15
THE POWER SUPPLY MODULE -SPS48
The SPS48 Power Supply Module is located right below the plastic inner cover that
covers the RNT48 and PWT48 transformers.
The SPS48 is a switched mode type power supply. The SPS48, which receives 2 x 15
VAC voltages from the PWT48 Power Transformer, gen5 VDC, +12 VDC and
–24 VDC for system operation, accessories and the RNT48 Ringer Transformer. The
ringer voltage (64 Vrms) that is at the output of the RNT48 transformer is directly
transmitted to the MB48IP motherboard.
Moreover, KTS (serial data line) connectors are available on the SPS48 for KY16 Mini
Printer, consoles, DSS modules and the IA12 ISDN Adaptor. The Busy and Data
signals on those connectors are not processed by SPS48; rather they are only
received by the MB48IP
Motherboard and transmitted to the accessories.
The figure below shows positions of the connectors on the SPS48 Power Supply
Module.
a. Battery Connector d. Motherboard Connector
b. Power Input e. KTS Connector
c. Ring output f. KY16 Connector
Figure-12
The following tables show the pin-connector outputs on the SPS48 module.