FOXBORO FCM10EF P0916CD總線通信模塊
對于大于滿量程的讀數(shù)，輸出將在22 mA（4至20 mA）或1.1 mA（0至1 mA）時(shí)飽和。這些模擬輸出是隔離的，因?yàn)樗休敵龆俗佣际歉拥?，所以模擬輸出與過程輸入的連接不會引入接地回路。為了安全起見，系統(tǒng)的一部分應(yīng)接地，通常在可編程控制器處。對于浮動負(fù)載（如儀表），外部接地端子24。這些傳感器的輸出可從PQM中的任何測量參數(shù)中選擇。在S2系統(tǒng)設(shè)置\模擬輸出1-4設(shè)定值組中選擇輸出選項(xiàng)。可用參數(shù)列表見第24頁第4.3.2節(jié)：模擬輸出。每個(gè)模擬輸出可分配兩個(gè)參數(shù)：一個(gè)主參數(shù)和一個(gè)備用參數(shù)。在正常操作條件下，主參數(shù)將出現(xiàn)在輸出端子上。要選擇備用參數(shù)，必須將其中一個(gè)開關(guān)輸入分配給select ANALOG OUT（選擇模擬輸出），并且開關(guān)輸入必須閉合（假設(shè)為常閉激活）。通過打開和關(guān)閉開關(guān)輸入，兩個(gè)模擬輸出參數(shù)可以在一個(gè)輸出上復(fù)用。這有效地實(shí)現(xiàn)了PQM的8個(gè)模擬輸出。
For readings greater than full scale the output will saturate at 22 mA (4 to 20 mA) or 1.1 mA (0 to 1 mA). These analog outputs are isolated and since all output terminals are floating, the connection of the analog output to a process input will not introduce a ground loop. Part of the system should be grounded for safety, typically at the programmable controller. For floating loads (such as a meter), ground Terminal 24 externally.The outputs for these transducers can be selected from any of the measured parameters in the PQM. The choice of output is selected in the S2 SYSTEM SETUP \ ANALOG OUTPUT 1-4 setpoints group. See Section 4.3.2: Analog Outputs on page –24 for a list of available parameters. Each analog output can be assigned two parameters: a main parameter and an alternate parameter.Under normal operating conditions, the main parameter will appear at the output terminals. To select the alternate parameter, one of the switch inputs must be assigned to SELECT ANALOG OUT and the switch input must be closed (assuming normally closed activation). By opening and closing the switch input, two analog output parameters can be multiplexed on one output. This effectively achieves 8 analog outputs for the PQM.
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