ACL CSC400 User Manual

36
4-20mA Output (1 / 2) Menu Options
The 4-20mA Outputs on the CSC400 allow the user to configure a variety of options to support a wide variety of applications
and equipment. Either a linear temperature mode, or a proportional valve mode can be used.
Proportional valve mode may be used for modulating a gas valve, for controlling a VFD, or for other applications. The PVLV
+/- ranges can be modified to provide a wider control range around the selected thermocouple's setpoint. The 4-20mA outputs
can also be configured to change how fast they respond to temperature by altering the "FS Ramp Time" (Full-scale Ramp
Time).
#
Menu Selections
Type
Description
Additional Notes & Possible Options/Values
1
4-20 Out 1 Temp TC1
Option
4-20mA Output 1 Mode Select
"Temp" = Normal temperature output: TC1,
TC2, or TC3
"PVLV" = Proportional Valve output: TC1,
TC2, or TC3
"Level In" = 4-20mA Input 1 (Repeater/Splitter
mode)
"Press In" = 4-20mA Input 2 (Repeater/Splitter
mode)
2
Low ( 4) -60
°
C
Option
4-20mA Output 1 Low value
for 4mA
A measured temperature below this Low value
outputs 4mA.
-60°C to 1200°C (-76°F to 2192°F)
3
High(20) 1200
°
C
Option
4-20mA Output 1 High value
for 20mA
A measured temperature above this High value
outputs 20mA.
-60°C to 1200°C (-76°F to 2192°F)
4
FS Ramp Time 10s
Option
Full-scale (4 to 20mA or 20 to
4mA) Ramp Time
Time taken to change from fully closed (4mA)
to fully open (20mA) and vice versa.
5s - 120s
5
PVLV Ctrl IGN1
Option
Proportional Valve Ignitor
Control for 4-20 Output 1
Selects which ignitor to control in Proportional
Valve mode: 1, 2, or 1&2
6
PVLV Min Disabled
Option
Proportional Valve Minimum
Mode Enable/Disable
"Minimum Fire" position for Proportional Valve
Mode. If enabled while set to PVLV TC1, TC2,
or TC3 modes, this 4-20 output will never
output less than the Minimum mA Value set in
the "Min mA Set" line below.
Possible Values: Enabled/Disabled
7
Min mA Set NA
Option
Minimum mA Value for
Proportional Valve Minimum
Mode
If PVLV Minimum Mode is enabled and this
output is set to PVLV TC1, TC2, or TC3 modes,
this 4-20 output will never output less than the
Minimum mA Value set here.
Possible Values: 4 - 20mA
8
PVLV + Range
Option
Proportional Valve Range
above selected Setpoint
Example: PVLV TC1, TC1 setpoint = 500°C. If
this value is set to 20 degrees, the PVLV output
will be at 4mA (I/P valve fully closed) above
TC1 Setpoint+20 (520°C). The PVLV 4-20mA
Output spans the entire band of the +/- range.
Possible Values: 0 - 100 degrees
9
PVLV - Range
Option
Proportional Valve Range
below selected Setpoint
Example: PVLV TC1, TC1 setpoint = 500°C. If
this value is set to 30 degrees, the PVLV output
will rise to 20mA (I/P valve fully open) below
TC1 Setpoint-30 (470°C). The PVLV 4-20mA
Output spans the entire band of the +/- range. In
this example: 470°C = 20mA, 520 = 4mA with a
linear calculation of the 4-20mA Output in
between these temperatures.
Possible Values: 0 - 100 degrees

ACL CSC400 Specifications

General

Brand	ACL
Model	CSC400
Category	Controller
Language	English