| 1. | 4 dry contact inputs , each with a led for status indication
4路干接输入及led状态显示 |
| 2. | 16 dry contact inputs , each with a led for status indication
路干接输入及led状态显示 |
| 3. | 24 dry contact inputs , each with a led for status indication
24路干接输入及led状态显示 |
| 4. | 32 dry contact inputs , each with a led for status indication
32路干接输入及led状态显示 |
| 5. | 64 dry contact inputs , each with a led for status indication
64路干接输入及led状态显示 |
| 6. | 18 dry contact inputs with line falut detect
18路输入带输入线故障检测 |
| 7. | 5dry contact inputs . common ground
5路干接输入输入共地 |
| 8. | That is : project and contact input , contact query , contact update , contact counting , contact report and system maintaining and bdefo method is adopted in analyzing system function model , ideflx method is adopted in establishing concept model and physical database is designed
并采用idefo方法进行了系统的功能分析；采用ideflx方法建立了系统的概念模型，进行了数据库的物理设计。 |
