Related Manuals for ABB 23WT25
Summary of Contents for ABB 23WT25
- Page 1 — 1KG T 15 10 8 5 , D EC EM B ER 19 T H, 2019 Application Note Connecting 23WT25 or 500FSD20 to NSK5 2 019 -1 2 -19 1 /20...
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Page 2: Table Of Contents
1 Introduction ..........................3 Motivation ............................. 3 Modulation ............................ 3 2 Configuration ..........................4 Setup.............................. 4 Supported channels and frequencies ..................5 Configuration of the 23WT25 modem ................... 6 2.3.1 Configuration of baud rate ..................7 2.3.2 Configuration of frequency ..................8 2.3.3 Configuration of the serial interface .............. -
Page 3: Introduction
Modulation 23WT25 and 500FSD20 as well as NSK5 work on the principle of frequency shift keying (FSK), a modulation scheme highly immune to interference and noise. The principle of FSK is the assignment of a characteristic frequency to a data bit to be trans- mitted. -
Page 4: Configuration
A modem at the end of a transmission line has to be terminated correctly. Please see 2.3 for details for the 23WT25 modem and 2.5 for the NSK5 modem. If a modem is staggered some- where in the run of a transmission line, it has to be configured to be high-impedant. -
Page 5: Supported Channels And Frequencies
Supported channels and frequencies 23WT25 and NSK5 support mainly the same center frequencies and deviations. The NSK5 also supports center frequencies above the ITU-T telecontrol and data band which reaches up to 3240 Hz. Only 600 baud and 2400 baud are not compatible to each other. A compatible 1200 baud plus speech option is not available on the 23WT25. -
Page 6: Configuration Of The 23Wt25 Modem
Configuration of the 23WT25 modem The 23WT25 modem is configured by jumpers. For an in-depth description of all settings please see the connections and settings document 1KGT 150 592. In this document only basic settings for the interoperation of 23WT25 and NSK5 are described. The position of jumpers can be taken from Figure 2. -
Page 7: Configuration Of Baud Rate
2.3.1 Configuration of baud rate Transmission on the 23WT25 is fully bit-transparent, i.e. the duration of one bit on the serial interface directly corresponds to the time during which the respective frequency is present on the transmission line. Therefore, data transmission is possible for any baud rate smaller or equal than the config- ured baud rate. -
Page 8: Configuration Of Frequency
2.3.2 Configuration of frequency The center frequency of the transmitter is configured by jumpers X2-1 to X2-5 while the re- ceiver is configured by X3-1 to X3-5. Table 3 shows the corresponding jumper settings for the possible center frequencies. Jumper R.35 R.37 R.38A/R38B... - Page 9 · · · · · 1620 Hz ± 30 Hz 2880 Hz ± 60 Hz · · · · · · · · · · · · · · · 1740 Hz ± 30 Hz 3120 Hz ± 60 Hz ·...
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Page 10: Configuration Of The Serial Interface
· DCD alarm delayed, X7-5 · · · SQL alarm (X5-7=1-2) X7-6 CCITT standard · · · X7-7 CCITT standard · · · Table 4: 23WT25 configuration of serial interface (default position) 2 019 -1 2 -19 1 0/2 0... -
Page 11: Configuration Of 2-Wire And 4-Wire Setups
2.3.4 Configuration of 2-wire and 4-wire setups The modem 23WT25 can be operated in 2- and 4-wire mode in a point-to-point or multidrop topology. The jumper configuration for the different modes and topologies can be taken from Figure 3, Figure 4, Figure 5 and Figure 6. - Page 12 Figure 6: 23WT25 4-wire mode, Multidrop 2 019 -1 2 -19 1 2/2 0...
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Page 13: Configuration Of The 500Fsd20 Modem
Configuration of the 500FSD20 modem The 500FSD20 DIN-rail device is a fully software configurable analog modem. Information on configuration for NSK5 is available on request. 2 019 -1 2 -19 13 /20... -
Page 14: Configuration Of The Nsk5 Modem
Figure 8). For an in-depth description of all settings please see the Instruction Manual docu- ment 1KHL 015 989. In this document only basic settings for the interoperation of 23WT25 and NSK5 are described. The position of jumpers and connectors can be taken from Figure 7 and Figure 8. -
Page 15: Configuration Of Baud Rate
The baud rate of the NSK5 can be selected by switch positions 1 to 3 at the switches S1 (Transmit channel) and S2 (Receive channel) as listed in Table 2. For simplicity, only baud rates compatible to 23WT25 and 500FSD20 are listed. Switch S1/S2 Baud rate Standard 50 Bd. -
Page 16: Configuration Of Frequency
The frequency of the NSK5 can be selected by position 4 to 8 of the switches S1 (Transmit channel) and S2 (Receive channel) as listed in Table 6 and Table 7. For simplicity, only frequen- cies compatible to 23WT25 and 500FSD20 are listed. R.37... -
Page 17: Verifying Operation
In return, the DCD led on the 23WT25 modem will be switched on now, and the RxD led of the 23WT25 will flicker according to the TxD led of the NSK5. On the 23WT25 the SQ led should stay off during the complete reception period as long as pauses between transmis- sions are short enough not to trigger the delayed DCD alarm. -
Page 18: Ordering Information
For order numbers regarding the analog modems the table below can be used. NSK5 is end of sale. Product Ident no Description 23WT25 R0001 1KGT012400R0001 RTU560 plug-in modem 23WT25 500FSD20 R0001 1KGT039200R0001 500FSD20 analog DIN-rail modem NSK5 G4AE R0005 HENF209637R0005... -
Page 19: References
References Product Reference(s) 23WT25 Datasheet 1KGT 150 591 Connections and settings 1KGT 150 592 500FSD20 Datasheet 1KGT 150 986 NSK5 Instruction Manual 1KHL 015 989 Contact Technical questions: de-eds-sales-support@abb.com Comercial topics, orders: substationautomation-products@de.abb.com Further information: https://solutions.abb/eds500 2 019 -1 2 -19... - Page 20 The detailed specifications agreed to at the time of ordering apply to all orders. ABB accepts no responsibility for possible errors or incompleteness in this document. We reserve all rights to this document and the topics and illustrations contained therein.