Model 360E Instruction Manual Operating Instructions

6.15.1.2. Control Inputs

These inputs allow the user to remotely initiate Zero and Span calibrations. Two methods for energizing the

inputs is provided below; the first using the internal +5V available on the CONTROL IN connector and the

second, if an external, isolated supply is employed.

Table 6-25: Control Input Pin Assignments

INPUT STATUS CONDITION WHEN ENABLED
A EXTERNAL ZERO
CAL Zero calibration mode is activated. The mode field of the display will
read ZERO CAL R.
B EXTERNAL SPAN
CAL Span calibration mode is activated. The mode field of the display will
read SPAN CAL R.
C Unused
D Unused
E Unused
F Unused
DIGITAL GROUND Provided to ground an external device (e.g., recorder).
U DC power for Input
pull ups
Input for +5 VDC required to activate inputs A - F. This voltage can be
taken from an external source or from the “+” pin.
+ Internal +5V Supply Internal source of +5V which can be used to activate inputs when
connected to pin U.

There are two methods to activate control inputs. The internal +5V available from the “+” pin is the most

convenient method (Figure 6-18). However, to ensure that these inputs are truly isolated, a separate, external 5

VDC power supply should be used.

CONTROL IN
A B C D E F U +
S
P
A
N
Z
E
R
O
CONTROL IN
A B C D E F U +
-+
5 VDC Power
Supply
S
P
A
N
Z
E
R
O
Local Power Connections External Power Connections

Figure 6-18: Control Inputs

05232 Rev B3 125