对于两线制仪表
2-wire measuring transducer:
• Connect Mana to M (jumper between Pins 11 and 20) and jumper Pins 10 and 11.
• Short-circuit the unused channels of a channel group or jumper them with a 3.3 kohm

对于四线制仪表
4-wire measuring transducer:
• Connect all Mx- to Mana and Pin 10 to Pin 11.
• Connect the unused channels of a channel group in series and connect Mx- to Mana
上面两段文字是何意！请各位大虾解释一下！！不胜感激！