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FSK Modems

MNK5 48E (External) : Datasheet
MNK5 24D (ABB NSK5 replacement)  :Datasheet
MNK6 : Datasheet, Connections and Settings
23WT25 : Datasheet, Connections and Settings

  • Digital Signal Processor(DSP)-based operation with high reliability and robust functionality
  • 600 and 1200 bps selectable baud rates in full duplex mode
  • Asynchronous and synchronous operation (with Rx and Tx clock)
  • Single channel and double channel (main and standby) models with auto switch-over feature
  • Transmit level adjustment from 0 to -18 dBm (-3 dBm steps) and 0 to -20 dBm with potentiometer
  • High receive sensitivity: minimum -30 dBm
  • 24, 48 and 110 Vdc power supply input options
  • Full support of handshaking signals
  • Separate monitoring (listening) port for data signals
  • LED indicator for Rx, Tx, DCD, RTS and Alarm signals
  • Alarm contact output
  • Rack-mount and rail-mount models available
  • Direct replacement for ABB NSK5 modem (MNK5 rack-mount model)
  • Direct replacement for ABB 23WT25 modem (23WT25 rack-mount model)
  • In compliance with IEC 60255-5 and IEC 61000-4-2 standards (EMC)
  • Type test approvals from accredited labs

Specifications: (MNK5)

Modulation FSK
Baud Rate 600/1200 bps
Frequency (600bps) 2760±240 Hz
(1200bps) 1700±400 Hz
Data Transfer Method Serial- Synchronous and Asynchronous
Operating Mode Full duplex / 4-wire
Tx Signal Level 0dBm to -20dBm
Rx Signal Sensitivity -30 dBm min
Synchronization Clock Transmit / Receive
Line Output Impedance 600 Ω
Data Interface V.24 / RS 232-D with Handshaking (DB-9 or DB-25)
Dimensions (W×H×D) Rack Mount (6U) 30.5×266.7×220 mm
Rail Mount 107×94×59 mm
Weight 300 gr
Operating Environment 0 to 45 °C
Power Supply 24/48/110 V dc