Comparison : Item # ASNA11, Ex9SN Series 1 Normally Open (NO) + 1 Normally Closed (NC) Side Mount Contact
Item # ASNA20, Ex9SN Series 2 Normally Open (NO) Side Mount Contact
Item # ASNB11, Ex9SN Series 1 Normally Open (NO) + 1 Normally Closed (NC) Front Mount Contact
Item # ASNB20, Ex9SN Series 2 Normally Open (NO) Front Mount Contact
Item # ASNF1001, Ex9SN Series 1 Normally Open (NO) (Fault) + 1 Normally Closed (NC) (Auxiliary) Fault Signal Contact