Hach sc1000 user manual DIN rail expansion modules

Installation

3.5 DIN rail expansion modules

CAUTION

The expansion modules for control cabinet installation use the 24 VDC power supply in the control cabinet. Make sure that the correct power supply is provided. Install a residual current circuit breaker. The modules have an environmental rating of IP20 and must always be mounted in an enclosure suitably rated for power and environment.

The sc1000 controller can be expanded with DIN rail expansion modules.

The following DIN rail module options can be installed:

•Base module (for connecting power, sc1000 network and display module)–The base module is required for the installation of expansion modules on the control cabinet.

•Relay card with 4 relays

•mA output card with 2 outputs

•mA input card with 2 inputs (analog or digital)–One base module can provide up to 2000 mA of power to the other modules connected to it on the DIN rail.

The total number of modules that can be connected together is limited by the power supply from the base module. Up to 13 communication modules can be attached to each base module. When more than 13 communication modules are needed, a second base module must be connected through the sc1000 network.

Refer to Appendix A on page 141 for more information about the DIN rail expansion modules.

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