LTH MOD53, Operation Manual

Page: 69 / 110

12 Pressure Input
68
Ø
Ø Ø
Ø ×
× ×
×
2.00
2.00 2.00
2.00
Atm
Set 20mA Input
Set the 20mA input pressure level
Ø
Ø Ø
Ø ×
× ×
×
Dampin Disabled
Enabled
Select whether “Pressure Damping” is
active
Ø Ø Ø Ø × × × ×
1.00 1.00 1.00 1.00
Atm
Pressure Limit A
Enter “From” limit. Damping is applied
when input pressure presents a step
change from Limit A to Limit B
Ø Ø Ø Ø × × × ×
3.50
3.50 3.50
3.50
Atm
Pressure Limit B
Enter “To” Limit.
Ø
Ø Ø
Ø ×
× ×
×
Input Mode
The MOD53 is designed to accept either direct 4-20mA input, or to interface to a
24V loop powered transmitter. Care should be taken when connecting the unit to
ensure that the cable resistance is not too great, which will lead to too great a
voltage drop over length of the cable.
For the direct input configuration the input resistance is 100
Ω
. The necessary
supply voltage will depend on whether there any other monitors in the loop. The
maximum required will be = 22mA X Total In-Line resistance (including the cable
resistance).