The Mux relay module, otherwise known as the I/O module for the D7024 is the D7053.
If using the DS9400M, the part # for the mux relay module is the MX465. (The D7053 can now be used ) The D7053 has a selection switch based on the panel type.
For all 7000/9000 series panels using the D8125MUX, the part # for the mux relay module is DS7465/DS7465i.
For Fire applications using D8125MUX a D9412G or D7412G panel must be used with a DS7465i
