XECOM
(7)
XE2420G
XE2420G Typical Connection Diagram
Notes:
1 C1 and C2 are high-voltage capacitors which may be required for EMI filtering in your system. Without these
components you may experience unintended radiation when the telephone cable is attached to your system. We
recommend selecting components such as the Panasonic ECKDRS471. This 470 pfd, 3000 volt capacitor will
direct the high frequency harmonics to the system ground. These capacitors must be rated at a minimum of 1500
volts to maintain the isolation required by FCC Part 68 Rules.
2. If additional componants, such as ferrite beads, are connected in series with Tip and Ring to provide additional
EMA filtering, Xecom recommends adding surge protection in front of those compannats to protect them from
dmage due to lightning strikes. Xecom recommends the Teccor Sidactor to provide this type of suplemental
protection.
3. The XE2420G includes internal circuitry to protect the modem from damage due to lightning strikes. However,
any components placed on the Tip and Ring traces will not be protected. If you add any components between
the phone jack and modem module, a surge protector such as the Teccor P3100BA Sidactor should be placed
before these components to protect them from lightning damage.
Parts List for XE2420G Typical Connection Diagram
Reference
Designation
Qty
Description
C1,C2
2
Cap. 470 pfd 2600V, Panasonic ECKDRS471
F1
1
PTC, Raychem TR600-150
(1) /DCD
(2) /CTS
(3) /Reset
(4) /DSR
(5) /RTS
(6) /DTR
(7) /RXD
(8) /TXD
(9) /RI
(10) GND
(11) SPKR
(12) /INT
(13) N/C
(14) VCC
(15) N/C
RING (24)
N/C (23)
TIP (22)
N/C (21)
N/C (20)
NP (19)
NP (18)
NP (17)
NP (16)
RJ11
C1
C2
VCC
To Host Serial Port
F1
XE2420G
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