WAGO 753-661/000-004 MSRP: Now: $464.50 Was: Fail-safe 4-channel digital input; 24 VDC; PROFIsafe 753-661/000-004
WAGO 750-668/000-004 MSRP: Now: $1,241.00 Was: Fail-safe 4 channel analog input; 0/4 20 mA; Differential input; PROFIsafe 750-668/000-004
WAGO 750-667/000-004 MSRP: Now: $826.20 Was: Fail-safe 4/4 channel digital input/output; 24 VDC; 2 A; PROFIsafe 750-667/000-004