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
