Relay Expander Module – REM-08

Relay Expander ModuleWhen to use
The Relay Expander Module (REM-08) is a powerful, and versatile control module with a wide range of applications. It is designed for use in various capacities for the testing and control of electronic circuitry. The power of the REM-08 is inherent in its ease of use and the great flexibility provided over control and configuration of its general purpose relays.
Modes Of Operation
  • Power-ON
  • Power-OFF
The REM-08 imposes minimal requirement on the resources of the main system controller or the Automated Test Equipment (ATE). To operate in the POWER ON mode, the only requirements are +5V for the power input, and 5 signals for the full control of 8 relays or 6 signals for the control of 16 relays. Two REM-08s can operate in Master/Slave configuration, which doubles the number of relays (to 16) and only requires 1 additional control line.
In POWER OFF applications, the REM-08 can be used through a dedicated connector with only one control line per relay (this port is also accessible in POWER ON mode for enhanced control).
The Relays used on the REM-08 are of the latching type, which maintain a setting even through complete power up & down cycles.
Inputs and Outputs
The REM-08 is designed with 8 double pole/double throw relays, which can switch 16 inputs to 32 outputs (or 32 inputs to 16 outputs). These numbers can be doubled by combining two REM-08s in a Master/Slave mode.
Current Ratings
  • Each relay can handle up to 4A @ 30 V DC, or 1.2 A @ 125 V AC
  • Each relay contact can handle up to 2A/30 V DC, or 600 mA/125 V AC
Power Requirements
The REM-08 requires +5V external power to operate, the on-board switching power supply generates the -5V required . The normal power consumption of REM-08 is about 500mW except during the clocking of the relays where it can increase up to 2W, however this is only 40-60 m sec. in duration.
To eliminate any EMI that may be generated by the on-board switching power supply, power is only applied during the initialization and configuration of the relays (
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