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Eltek Limited
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  5. GenII - Model SC250 - Receiver / Logger

GenII - Model SC250 - Receiver / Logger

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The SC250 is the hub of the secure logging system, for use with Eltek`s Darca Secure software. It is not necessary to have a permanently connected PC and the built-in battery means data logging is not interrupted if there is a temporary AC supply failure. Alarms are included as standard (SMS and local) and include grouping so that alarms for individual departments can be configured.

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The UHF flexi/SMA standard quarter wave whip antenna and LW-ANT/SMA antenna have a similar performance profile; but the LW-ANT/SMA can be used when the logger is required to be placed inside a screened cabinet, or better reception can be achieved by placing the antenna in a particular location where it would not be practical to locate a logger.Yagi directional antennae are useful in outdoors applications for achieving a longer distance between the transmitter and receiver. Please note that in the UK, these antennae should only be used with a logger or receiver; please check your local regulations if you are outside the UK.

GSMSQ

GSM Modem kit (logger / receiver side)

The kit consists of the following:

  • Wavecom Xtend modem
  • Mounting tabs
  • Logger to modem lead (type GSM-mdm-com2X)
  • Antenna with 1.8m lead
  • SMA connector
  • User instructions

When installed, access to the Squirrel can be achieved via a GSM network.
A SIM card from the Network Service Provider is required.
The kit is necessary for text messaging functionality.

GSMPC

GSM Modem kit (PC side)

The kit consists of the following:

  • Wavecom Xtend modem
  • Antenna
  • Modem to PC serial lead (type LC-PC/MDM)
  • AC to 12V DC power supply (type MPGSMextend)
  • User instructions

SQ/RS485

RS232 to RS485 interface converter

This unit converts the standard RC250 or Squirrel RS232 interface to a RS485 interface; thereby allowing equipment with the RS485 interface to communicate with the receiver/logger.

  • Allows much longer cable lengths than RS232 - RC250/Squirrel can be further away from the PC or other connected equipment
  • All RC250 units (after serial number T-25194) are compatible with this device

If you require a new logger to work with this interface, please specify at the time of ordering. Existing loggers may need a firmware update to work with the RS485 interface - please contact Eltek for advice.

Squirrels using this interface must be mains powered.

  • Number of channels: Up to 250
  • Number of transmitters: Up to 125
  • Ambient temperature: -10 to +55°C
  • Humidity: Up to 95% (non condensing)
  • Power supply: 12V DC at 500mA powered using type MP12U, (input 100-250V AC)
  • Built-in batteries: 6 x AA Ni Mh battery
  • Backup battery life: Typically 24 hours
  • Memory: 247,000 readings expandable to 2,000,000
  • Clock accuracy: 1 second/day at 20°C
  • Dimensions: D 60mm x W 180mm x H 120mm
  • Weight: 1Kg inc. batteries
  • Case material: Scratch resistant Nextel coated ABS
  • PC/modem interface: RS232C up to 38.4K Baud
  • Receiver: Crystal controlled
  • Sensitivity: UHF: -117dBm
  • Antenna connector: SMA 50 ohm female
  • Antenna: Quarter wave standard, lightweight dipole optional
  • Communication options: USB, GSM, Ethernet, internet and GPRS
  • Alarm: SMS + 1 contact closure