(3)
유사계단파 (12V)
SI-5400AQ, DP-6000AQ, DP-44012AQ, SI-2700AQ, SI-22012AQ, DP-3000AQ, SI-1700AQ, DP-2000AQ, DP-1500AQ, DP-1000AQ, DP512, DP412
유사계단파 (24V)
DP-95024BQ, SI-64024BQ, DP-6000BQ, DP-50024BQ, SI-32024BQ, DP-40024BQ, DP-3000BQ, SI-2200BQ, DP-25024BQ, DP-16024BQ, DP-1000BQ, DP524, DP424
유사계단파 (48V)
DP-95048Q, SI-85048Q, DP-70048Q, DP-55048Q, DP-40048Q, DP-35048Q, DP-25048Q, DP-10048Q