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Part 6 provides a description of the overvoltage/overheat protection circuits. 

1. Abnormal State Detection Circuit

The abnormality detection circuit consists of the transistor Q520/Q521 thyristor circuits. 
If power operation becomes abnormal and a signal is transmitted to the abnormality detection circuit, Q521 is turned on, cur-
rent flows to the diode of PC50 and is transmitted to the control circuit of the main converter, thereby shutting down main con-
verter operation. (See Part 2)

2. Overheat Protection Circuit

When temperature inside the power source rises to an abnormal temperature, the resistance of posister PTC540 rises, tran-
sistor Q540 is turned on, and the signalis transmitted to the abnormality detection circuit via D542. 

3. Overvoltage Protection Circuit

If voltage of either 15V, 15VPT or 41V output becomes excessively high, the voltage is transmitted to the abnormality detec-
tion circuit via Zener diode D526. 

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• A Power Supply Unit (PSU) is pre-installed.

31

Category

Model No.

Description

Main Unit

KX-NCP500
KX-NCP1000

Main Unit
Main Unit

Main Processing Card 

IP Convergence Main Processing Card (IPCMPR)

IPCMPR Option Cards

KX-NCP1104
KX-TDE0110
KX-TDE0111
KX-TDA0196

4-Channel VoIP DSP Card (DSP4)
16-Channel VoIP DSP Card (DSP16)
64-Channel VoIP DSP Card (DSP64)
Remote Card (RMT)

Activation Key Codes*1

KX-NCS3102
KX-NCS3104
KX-NCS3201

KX-NCS3204

KX-NCS3208

KX-NCS3216

KX-NCS3501
KX-NCS3504
KX-NCS3508
KX-NCS3516
KX-NCS3701
KX-NCS3704
KX-NCS3708
KX-NCS3716
KX-NCS3910
KX-NCS2101
KX-NCS2105
KX-NCS2110
KX-NCS2140
KX-NCS2149
KX-NCS2201
KX-NCS2205
KX-NCS2210
KX-NCS2240
KX-NCS2249
KX-NCS2301

2-Channel IP Trunk Activation Key (2 IP Trunk)
4-Channel IP Trunk Activation Key (4 IP Trunk)
1-Channel IP Softphone/IP Proprietary Telephone Activation Key (1 IP Softphone/
IP PT)
4-Channel IP Softphone/IP Proprietary Telephone Activation Key (4 IP Softphone/
IP PT)
8-Channel IP Softphone/IP Proprietary Telephone Activation Key (8 IP Softphone/
IP PT)
16-Channel IP Softphone/IP Proprietary Telephone Activation Key (16 IP Soft-
phone/IP PT)
1-Channel IP Proprietary Telephone Activation Key (1 IP PT)
4-Channel IP Proprietary Telephone Activation Key (4 IP PT)
8-Channel IP Proprietary Telephone Activation Key (8 IP PT)
16-Channel IP Proprietary Telephone Activation Key (16 IP PT)
1-Channel SIP Extension Activation Key (1 SIP Extension)
4-Channel SIP Extension Activation Key (4 SIP Extension)
8-Channel SIP Extension Activation Key (8 SIP Extension)
16-Channel SIP Extension Activation Key (16 SIP Extension)
Activation Key for Software Upgrade to Enhanced Version (Software Upgrade 01)
Activation Key for CA Basic for 1 User (CA Basic 1user)
Activation Key for CA Basic for 5 Users (CA Basic 5users)
Activation Key for CA Basic for 10 Users (CA Basic 10users)
Activation Key for CA Basic for 40 Users (CA Basic 40users)
Activation Key for CA Basic for 128 Users (CA Basic 128users)
Activation Key for CA PRO for 1 User (CA Pro 1user)
Activation Key for CA PRO for 5 Users (CA Pro 5users)
Activation Key for CA PRO for 10 Users (CA Pro 10users)
Activation Key for CA PRO for 40 Users (CA Pro 40users)
Activation Key for CA PRO for 128 Users (CA Pro 128users)
Activation Key for CA ACD Monitor for 1 ICD Supervisor (CA Supervisor 1user)

Virtual Trunk Cards

-
-

Virtual 16-Channel VoIP Gateway Card (V-IPGW16)
Virtual 16-Channel SIP Trunk Card (V-SIPGW16)

Virtual Extension Cards

-
-
-

Virtual 32-Channel VoIP Extension Card (V-IPEXT32)
Virtual 32-Channel SIP Extension Card (V-SIPEXT32)
Virtual 4-Channel Cell Station Interface Card (V-IPCS4)

Small Free Slot
Physical Trunk Cards

KX-NCP1180
KX-NCP1280
KX-NCP1290CE
KX-NCP1290CJ
KX-NCP1290CN
KX-NCP1290

4-Port Analogue Trunk Card (LCOT4)
2-Port BRI Card (BRI2)
PRI Card (PRI30)
PRI Card (PRI30)
PRI Card (PRI30)
PRI Card (PRI23)

Physical Extension Cards

KX-NCP1170

4-Port Digital Hybrid Extension Card (DHLC4)

Regular Free Slot
Physical Trunk Cards

KX-NCP1187

T-1 Trunk Card (T1)

KX-NCP1188

E-1 Trunk Card (E1)

Physical Extension Cards

KX-NCP1171

8-Port Digital Extension Card (DLC8)

KX-NCP1172

16-Port Digital Extension Card (DLC16)

KX-NCP1173

8-Port Single Line Telephone Extension Card (SLC8)

KX-NCP1174

16-Port Single Line Telephone Extension Card (SLC16)

Other Physical Card

KX-NCP1190

Optional 3-Slot Base Card (OPB3)

OPB3

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*1Note that the types of activation keys are subject to change without notice.

• IP proprietary telephones (e.g., KX-NT300 series)
• IP softphones (e.g., KX-NCS8100)
• Digital proprietary telephones (e.g., KX-DT300 series)
• Analogue proprietary telephones (e.g., KX-T7700 series)
• Portable stations (e.g., KX-TCA355, KX-TCA256, KX-TD7690)
• DSS consoles (e.g., KX-DT390)
• Single line telephones (e.g., KX-T7710)

• KX-T30800 series proprietary telephones and DSS consoles
• KX-T61600 series proprietary telephones and DSS consoles
• KX-T123200 series proprietary telephones and DSS consoles
• KX-TD7500 DECT portable station
• KX-NT136 IP proprietary telephone
• KX-NT265 IP proprietary telephone (apart from software version 2.00 or later)

• For the equipment (e.g., Add-on Key Module, USB Module, Headset*1) that can be connected to a particular telephone, refer to

the telephone's manual.

*1 The KX-T7090 headset can be connected to the KX-T7000, KX-T7200, KX-T7300, KX-T7400, and KX-T7500 (except for KX-
T7560/KX-T7565) series telephones.

• This PBX supports SIP Extensions. However, some PBX features may not be available for SIP Extensions, depending on your

telephone type.

• Under power failure conditions, the connected telephones may not operate. Please ensure that a separate telephone, not depen-

dent on local power, is available for emergency use.

• Prior to connection of this product, please verify that the intended operating environment is supported.

Satisfactory performance cannot be guaranteed for the following:
-interoperability and compatibility with all devices and systems connected to this product
-proper operation and compatibility with services provided by telecommunications companies over connected networks

Other Physical Cards

KX-TDA0161

4-Port Doorphone Card (DPH4)

KX-TDA0162

2-Port Doorphone Card (German Type) (DPH2)

KX-TDA0164

4-Port External Input/Output Card (EIO4)

KX-TDA0166

16-Channel Echo Canceller Card (ECHO16)

KX-TDA0191

4-Channel Message Card (MSG4)

KX-TDA0192

2-Channel Simplified Voice Message Card (ESVM2)

KX-TDA0194

4-Channel Simplified Voice Message Card (ESVM4)

Cell Stations (CSs)

2.4GHz

KX-TDA0141

2-Channel  Cell  Station Unit Using a DHLC/DLC Card (PT-interface CS) for
2.4GHz Portable Station

KX-TDA0151

2-Channel Cell Station Unit Using a DHLC/DLC Card (PT-interface CS) for
2.4GHz Portable Station

DECT

KX-TDA0141CE

KX-TDA0155CE

KX-TDA0158CE

KX-NCP0158CE

2-Channel Cell Station Unit Using a DHLC/DLC Card (PT-interface CS) for DECT
Portable Station 
2-Channel Cell Station Unit Using a DHLC/DLC Card (PT-interface CS) for DECT
Portable Station
8-Channel High-density Cell Station Unit Using a DHLC/DLC Card (PT-interface
CS) for DECT Portable Station
8-Channel IP Cell Station Unit Using a V-IPCS4 Card for DECT Portable Station

DECT
6.0

KX-TDA0155

KX-TDA0158

KX-NCP0158

DECT 6.0 2-Channel Cell Station Unit Using a DHLC/DLC Card (PT-interface CS)
for DECT 6.0 Portable Station
DECT 6.0 8-Channel Cell Station Unit Using a DHLC/DLC Card (PT-interface CS)
for DECT 6.0 Portable Station
DECT 6.0 8-Channel IP Cell Station Unit Using a V-IPCS4 Card for DECT 6.0
Portable Station

Proprietary Equipment

KX-T30865
KX-T7765

Doorphone

Category

Model No.

Description