BOQU SD Series Betriebsanleitung - Seite 5

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5. Installation wiring

6．1．Instrument installation

The instrument shall be installed in a clean, dry, well

ventilated place without vibration。

1．There are 4 studs on the bottom plate for installation。

2 ． Interface between measurement and water sample

collection 1/4" NPT Internal thread ， You can also choose card

sleeve installation.。

Influent mode： Down in and up out， Keep the inflow

valve as small as possible，The best way is that water

does not produce bubbles。

6. 2. Connection mode

 L: 220AC

 N：220AC

 PE: Earthing

 V+，V-：DC 24V input

 A，B，P+，P-：Communication wiring with front end（A：

Green wire， B： Black wire， P+： Red wire， P-： Yellow wire）

 I+： 4-20mA+ output （ Four wire system current positive, No

need to provide 24V）

 I-：4-20mA- （Four wire system current negative, No need

to provide 24V）

 DO1，com1：Alarm1 relay action

 DO2，com2：Alarm2 relay action

 DO3，com3：unuse

Operating instructions for SD Series Online Color Meter