See FC721.. for technical overview and note the additional / other specifications:
With 24 indicator groups‚ each with one red and one yellow LED.

Expansion

• FCA2012-A1 License key (L1)
• FCA2001-A1 RS232 module (isolated)
• FCA2002-A1 RS485 module (isolated)
• FH7201-Z3 Housing (Eco)
• FH7202-Z3 Housing (Standard)

Accessories

• FTO2005-C1 Key switch (Kaba)
• FTO2006-B1 Key switch (Nordic)
• Z3B171 Relay module
• FHA2016-A1 19″ mounting kit
• FCA2014-A1 Cable kit (Communication)
• DL3750+ Matrix printer (Extern)