Teledyne 3000TA-XLEU - Trace oxygen analyzer - Manual (Page 42)

Installation 3000TA-XL-EU
Teledyne Analytical Instruments 26
43 Threshold Alarm 2, normally open contact
36 System Alarm, normally closed contact
20 System Alarm, moving contact
37 System Alarm, normally open contact
3.3.2.2.3 Digital Remote Cal Inputs
These inputs accept 0 V (off) or 24 VDC (on) inputs for remote
control of calibration. (See Remote Calibration Protocol below.) See
Table 3-3 for pin connections.
Zero: Floating input. 5 to 24 V input across the + and – pins puts the
analyzer into the Zero mode. Either side may be grounded at
the source of the signal. 0 to 1 volt across the terminals allows
Zero
mode to terminate when done. A synchronous signal must
open and close the external zero valve appropriately. See
Remote Probe Connector. (The –C option internal valves
operate automatically.)
Span: Floating input. 5 to 24 V input across the + and – pins puts the
analyzer into the Span mode. Either side may be grounded at
the source of the signal. 0 to 1 volt across the terminals allows
Span
mode to terminate when done. A synchronous signal
must open and close external span valve appropriately. See
Figure 3-5 Remote Probe Connector. (The –C option internal
valves operate automatically.)
3.3.2.2.4 Cal Contact
This relay contact is closed while analyzer is spanning and/or
zeroing. (See Remote Calibration Protocol below.)
Table 3-3: Remote Calibration Connections
Pin Function
9 + Remote Zero
11 – Remote Zero
10 + Remote Span
12 – Remote Span