YOKOGAWA OX400, Руководство пользователя

Страница: 32 / 69

<4. Piping and Wiring>
4-5
IM 11M10B01-01E 8th Edition : Jan. 10, 2019-00
(5) Error contact output terminal
If an error (ERRx) occurs, the contact closes.
(6) Alarm contact output terminal
If an oxygen concentration high/low limit alarm (ALM7) occurs, the contact closes.
(7) Contact output terminal for flow path switching by multi-selector (option)
This terminal is added only when the option “/MS” is specified.
• Output terminal for measurement path flow switching: This is a contact output to switch
valves for sampling flow paths by panel operation of the OX400. You can select and turn on
one of the three flow paths. “1” when lines between MS1, MS2, MS3 terminals and MSCOM
are closed, and “0” when open. For details, see Section 6.5.
Table 4.3 Measurement Flow Path Switching Output by Multi-selector
MS1-MSCOM MS2-MSCOM MS3-MSCOM
MS OFF 0 0 0
MS1 ON (Select flow path 1) 1 0 0
MS2 ON (Select flow path 2) 0 1 0
MS3 ON (Select flow path 3) 0 0 1
• Output of information on flow path under measurement by multi-selector: Answer-back
output of the flow path that is being measured. ”1” when lines between terminals MSI1/MSI2
and MSICOM are closed, and “0” when open.
Table 4.4 Output of Information on Flow Path under Measurement by Multi-selector
MSI1-MSICOM MSI2-MSICOM
MS OFF 0 0
MS1 (Flow path 1 under measurement) 1 0
MS2 (Flow path 2 under measurement) 0 1
MS3 (Flow path 3 under measurement) 1 1
CAUTION
Be careful because the contact output is open when the power of the OX400 is OFF.