Modular Safety Relays (200 Series)

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Input and Output Module Selection

Input Module Selection

To determine the base module and input modules needed, start on the left side and count down the number of OSSD input devices you have to connect to the system. Then move to the right according to the number of non-OSSD input devices you need, such as 1 N.C. or 2 N.C. input devices. Count the modules and this will be your total required for the system.

Note: This selection chart assumes that if you have OSSD input devices, they will be connected to the base module. If you do not want this, then change the MSR211 to the MSR210 and change one MSR220 to an MSR221. This will provide you the same system, but now the OSSD input device will not be on the base module.

Output Module Selection

Start at the top left and count the number of delayed outputs required. Then count across the number of immediate outputs required. Ensure you only have a total of two output modules total.

Note: The base module has two N.O. safety outputs built in.