The TC4 remote control module is intended for reception and issuing of remote control commands, supervision of authenticity of received commands, control of actuation devices (contactors, etc.), monitoring of operability of auxiliary relays, monitoring of all phases of execution of the RC command.

Performance data

  • 4 control channels (a single channel consists of "enable," "disable" output signals and "ACR interlock")
  • Range of commutated voltages – VAC /VDC 110–240 V
  • Overvoltage protection of control circuits – 390 V (peak value)
  • Maximum current in control circuit – 10 A (VAC), 0.45 A (VDC)
  • Galvanic isolation – 1500 V (power supply/interface lines, control circuits)

Main functions

  • Emission of control commands over 4 channels  (a channel comprises "enable," "disable" and "ACR interlock" output signals)
  • Issuing of RC commands by a control engineer from the upper level
  • Event registration with an accuracy of up to 1 ms

Additional capabilities

  • Archive with capacity for 860 events
  • Regular testing of serviceability of relays (winding resistance of each relay, sticking of primary relays)
  • Monitoring of electrical and mechanical durability of each relay
  • Self-testing of the module (availability of internal voltages necessary for operation, verification of checksums of data read from non-volatile memory)
  • Verification of voltage availability/unavailability
  • At input contacts of control circuit of each channel
  • Light indicators showing the sending of control signals for each relay, malfunctioning relays, port states, power supply/module status
  • Module`s time can be synchronized either through the central controller, or via an external GPS receiver with an accuracy of 1 ms
  • Built-in real time clock

Communication ports

2хRS-485, data rate up to 1 Mbit/s

Data transmission protocols

IEC 60870-5-101

Module`s control arrangement

The channel control circuit uses two relays in series. Two primary relays (PR) corresponds to a single secondary relay (SR). Voltage monitoring is effected in front of and after contacts of each relay, except in case of unavailability of voltage at channel input at the initial moment of command execution.

Module`s control arrangement

Reception and executionof control commands

Upon receiving the "select" command, a check is made to detect any faulty relays on the corresponding channel. If control can be effected, a positive confirmation receipt is issued, and the corresponding auxiliary relay`s indicator lights up in green. Moreover, the rest of indicators will remain unlit until the command`s execution is completed. Next, the up-to-date timer would starts, and the arrival of an "execute" command would be awaited. If the "execute" command is not received until the up-to-date time expires, or if another, "unexpected" command is received, the "execute" command`s execution is terminated, and the indicators return to the states they had before the said command`s execution was initiated. It is impossible to receive control commands simultaneously over two RS-485 ports.

Power supply

  • 18–36 VDC (up to 20 ms voltage dips with a  repetition period of 50 ms are allowed)
  • Reverse-polarity protection
  • Power consumption – 5 W

Overall dimensions

247х104х75 mm (WхHхD)


DIN rail

Operating temperature range