MSR221P

The MSR221P is an input expansion module for the modular Minotaur MSR200 family of monitoring safety relays. It can be connected to either the MSR210P or MSR211P to provide additional inputs.

Up to 10 input modules of MSR221P can be connected to a base unit by simply removing the terminator, included with each base unit, and connecting the ribbon cables of the neighboring module. The connecting ribbon cable provides power to the MSR220P as well  as a check on its status. The terminators must be inserted into the final output module. The input modules to a base unit can be either MSR220P or MSR221P in any combination or order.

The MSR221P has two independent inputs, which can be wired in one of three ways: 1N.C., 2 N.C. or a light curtain. When connected in the 2 N.C. configuration, the MSR221P does not perform cross fault monitoring (i.e., checks for shorts between the 2 inputs).

Four LEDs provide status information on the inputs. Green indicates the input is closed and red indicates the input is open.