Connecting The Control Inputs (Digital Inputs); Figure 2-7. Control Input Connector; Table 2-5. Control Input Signals - Teledyne T400 User Manual

2.3.1.5 CONNECTING THE CONTROL INPUTS (DIGITAL INPUTS)

With zero and span valves option installed, their digital control inputs are provided
through the rear panel 10-pin CONTROL IN connector to remotely activate the zero and
span calibration modes.
Energize the Control Inputs either by the internal +5V available from the pin labeled "+"
(more convenient), or by a separate external 5 VDC power supply (ensures that these
inputs are truly isolated). Refer to Figure 2-7
CONTROL IN
A B C D E
Local Power Connections
(non-isolated configuration)

Table 2-5. Control Input Signals

INPUT # STATUS DEFINITION
REMOTE ZERO CAL
A
REMOTE LOW SPAN CAL
B
REMOTE SPAN CAL
C
D, E & F SPARE
Digital Ground
U External Power input
5 VDC output
+
30
+
F U

Figure 2-7. Control Input Connector

The analyzer is placed in zero calibration mode.
The analyzer is placed in low span calibration mode.
The analyzer is placed in span calibration mode.
The ground level from the analyzer's internal DC power supplies (same as
chassis ground).
Input pin for +5 VDC required to activate pins A – F.
Internally generated 5V DC power. To activate inputs A – F, place a jumper
between this pin and the "U" pin. The maximum amperage through this port
is 300 mA (combined with the analog output supply, if used).
Teledyne API – Model T400 O
CONTROL IN
A B C D E F
-
5 VDC Power
Supply
External Power Connections
(isolated configuration)
ON CONDITION
Analyzer
3
+
U
+
083730400A DCN8130