5. Optional Equipment
Table 200-4 shows optional equipment that can be
installed in Multiline Terminals. When a DPA-E Unit,
DTA-E Unit, or both, are installed in a Multiline
Terminal, the Terminal must be supported by an
ESI-EB ETU.
OPTIONAL
NC = Not connectable C = Connectable
*Required to be supp orted by an ESI-EB ETU.
l
= Compatible with other options simultaneously
220.5 POWER REQUIREMENTS
1. When AC power is to be used to power the system,
a PSE-AD-1 PSU must be installed in each CCU.
The system must have a dedicated grounded nominal
117V AC f 10% outlet. (See paragraph 220.12,)
The AC outlet must be a standard 125 Volt 15 Amp
three prong type, which provides circuit ground. If
circuit ground is not available, a locally provided
frame ground to earth ground
connection
must be
provided.
(See paragraph 220.6).
The AC power must be within the limits provided in
paragraph 220.12 of this document.
It is recommended that the best locally available AC
surge protection be installed at the AC power outlet.
2. When DC power is to be used to power the system,
a PSE-DD-1 PSU must be installed in each CCU.
A locally provided nominal -48VDC power source
must be connected to the PSE-DD-1 PSUs.
A
frame ground, to earth ground,
connection must
be provided, as described in paragraph 220.6. The
-48VDC power source must operate within the limits
provided in paragraph 220.12.
220.6 GROUNDING REQUIREMENTS
The CCUs must be properly grounded.
If circuit
ground is not available at the dedicated AC outlet,
the following steps should be taken:
1.
2.
3.
4.
ND-20292
CHAPTER 2
APRIL, 1990
Provide a
suitable cold water pipe ground
in
accordance with the operating telephone
company procedures.
If no water pipe ground is available, a ground rod
should be installed in accordance with the local
operating telephone company procedures.
Where a ground other than conduit ground is
used, a grounding terminal is ,provided on the
ESE-32B-1 CCU as shown in Figure 200-3.
Modem Pooling Grounding Requirements; The
RS-232C is susceptible to noise and static and
requires proper grounding to protect the DTA-E
Unit and DTE connected to it. Normally, Data
Terminal Equipment (DTE) with RS-232C
interface has its frame ground connected to earth
ground. Therefore, ensure the DTEs connected to
DTA-E Units are properly connected to earth via
circuit ground of its AC power cord.
The same care should apply to a modem connected to
the DTA-E Unit.
If a modem is not provided with a three prong type AC
plug supporting conduit ground, the modem must be
properly connected to earth ground.
r
Grounding
Terminal
0
(Left Side View of
ESE-32B-1 CCU)
Figure 200-3 CCU Grounding
1
-
-
200 - 5