外形尺寸：SR91:48×48×110 SR92:72×72×110
SR93:96×96×110 SR94:96×48×110
输入类型：8自由输入或6直流电压（电流）输入。
输出类型：常开继电器接点、4~20mA，固态继电器驱动，电压0~10V。RS485/RS232（通信组件可选）
常用型号：

SR91-8Y-90-0N SR91-8Y-90-0Y
SR91-8Y-90-1N SR91-8I-90-05
SR91-8I-90-0 I0 SR91-8I-90-1N
SR91-8P-90-0N SR91-8P-90-06
SR92-8Y-N-90-0000 SR92-8Y-Y-90-0000
SR92-8Y-N-90-1000 SR92-8I-I-90-0050
SR92-8I- I -90 -0070 SR92-8I-N-90-1000
SR92-8P-N-90-1000 SR92-8P-Y-90-1000
SR93-8Y-N-90-1050 SR93-8Y-Y-90-1050
SR93-8Y-N-90-1000 SR93-8I-N-90-1000
SR93-8I-I-90-1000 SR93-8V-N-90-1000
SR93-8P-N-90-1000 SR93-8P-Y-90-1070
SR93-8P-Y-90-1680 SR94-8P-Y-90-1680
SR94-8Y-N-90-3000 SR94-8I-I-90-0070
SR94-8I- I -90 -0050 SR94-8I-N-90-1000
SR94-8P-N-90-0070 SR94-8P-Y-90-1000
SR94-8Y-N-90-1000 SR94-8Y-Y-90-2000