The following is a list of compatible triggers that can be used with the SPD-20:
CY-6
CY-8
CY-12H
CY-12R/C [Three position trigger results not possible]
CY-14C
CY-15R [Three position trigger results not possible]
FD-7
FD-8
KD-7
KD-80
KD-85
KD-120
KD-125
PD-5
PD-6
PD-7
PD-8
PD-9
PD-100
PD-105 (Dual trigger results from input #2 only)
PD-120 (Dual trigger results from input #2 only)
PD-125 (Dual trigger results from input #2 only)
RT-3T
RT-5S (Dual trigger results from input #2 only)
RT-7K
CY-6
CY-8
CY-12H
CY-12R/C [Three position trigger results not possible]
CY-14C
CY-15R [Three position trigger results not possible]
FD-7
FD-8
KD-7
KD-80
KD-85
KD-120
KD-125
PD-5
PD-6
PD-7
PD-8
PD-9
PD-100
PD-105 (Dual trigger results from input #2 only)
PD-120 (Dual trigger results from input #2 only)
PD-125 (Dual trigger results from input #2 only)
RT-3T
RT-5S (Dual trigger results from input #2 only)
RT-7K