0049-1200-XXX RM16M – USER’S GUIDE 12/29/2010
Rev. C
Page 1
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CHAPTER ONE – INTRODUCTION
The Raymar-Telenetics RM16M Universal Data Shelf
TM
is a heavy-gauge steel-plated modem rack
chassis. It measures 7 inches high and 10.75 inches deep, and mounts in a standard 19- or 23-inch rack.
The Data Shelf comes in two versions: AC (RM16M VAC-R) and DC (RM16M VDC-R). This guide
covers both versions.
OVERVIEW
The Raymar-Telenetics RM16M Universal Data Shelf has slots that accept 16:
•
Modems
•
Digital Data Service (DDS) units
•
Dial backup units
•
Automatic calling units
All of these devices are plug-in printed circuit (PC) cards that slide into the front of the Data Shelf. The
cards can be mixed in any way within the Data Shelf. Each card has been independently tested and
meets Part 68, FCC rules and regulations.
Power, Data Terminal Equipment (DTE), and communications-line connections are made at the back
panel of the Data Shelf (see the “Back Panel Interface Connectors” section). This allows PC cards to be
installed or replaced, without disturbing the cable connections at the back.
The AC version of the Data Shelf accepts either a single power module that occupies two slots, or two
power modules that occupy one slot each. The DC version accepts two power modules that occupy one
slot each. The power modules power all the PC cards in the Data Shelf, converting user-supplied 48
volt DC, or 90 – 265 VAC, input to +15 VDC, -15 VDC, and + 8.5 VDC outputs for distribution to the
PC cards. Regulators on the PC cards convert the plus and minus 15 VDC to plus and minus 12 VDC
and +8.5 VDC to +5 VDC.
NOTE:
If two power modules are installed, one powers the Data Shelf while the other
acts as a redundant power source.
Figure 1-1 shows an example of the location and orientation of the modem cards and power module.
For convenience, the front panel of the Data Shelf is hinged to allow easy access to the modem cards
and power module(s) without disturbing the DTE and communication-line connections at the back of the
Data Shelf.