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Trip amplifiers, otherwise
known as trip amps, high-low limit alarm trips, alarm relays, alarm trips, or
threshold relays, provide voltage free contacts that change state when a
monitored process signal passes an adjustable reference set-point. These trip
amps can be applied to numerous applications including detection of high or low
limit alarm conditions and duty/standby pump control.
Typical trip amplifier applications
- Limit alarm for detection of High and Low alarm
conditions
- With an input from a level sensor; provide pump control
to maintain a level between the high and low set points (dual version with
interlock function enabled).
- With an input from a flow sensor and cycling on-off
timer, control the position of a penstock or motorised valve to maintain a
fixed flow rate.
- With an input from a temperature or pressure transducer;
start a process at one set point, with shut down if the high point is reached
(dual trip version).
- With an input signal from a pH monitor; provide control
of a dosing pump.
- Replacement for vane type switches.
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B12-TT Indicating Trip
Amplifier - Our latest trip amplifier, normally available ex-stock.
Programmable trip points, input source and scale, delay function, hysteresis,
alarm type, relay action and interlocked action and more.
See Indicating trip amplifier
data sheet
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Trip amplifier selection guide
Select from: <Single channel> <Dual
channel> <Three channel>
PLEASE NOTE with most trip amps, other inputs
within the following ranges can be provided.
Current from 0-1mA to 0-30mA,
Voltage from 0-1V to 0-250V.
CURRENT LOOP INTEGRITY FEATURE:
with
B12, 107 and 112 type trip amplifiers the current input loop
is maintained
when the module is unplugged
- - - - - - - - - - - - - - - - - - - - - - - -
- - - - -
Key:
 Datasheet;
 User guide
Single channel trip amplifiers
|
TYPE |
INPUT |
OUTPUT |
SET_POINTS |
FIELD
RE-RANGE |
POWER |
MOUNTING |
B12-ST
|
Current
version
Any true or raised zero signals within the range:
0-20mA
Voltage version
Any true or raised
zero signals within the range:
0-5 V
|
SPCO |
'screw driver slot' trim-pot |
Input
High/Low
action |
AC 110,200,220,240
~
12, 24,
48VDC |
Wall or DIN rail |
B12-ST/K
|
Current
0-10mA
0-20mA
4-20mA
Voltage
0-5 V
1-5 V |
SPCO |
Ten-turn precision dial 0-100% |
High/Low action |
AC 110,200,220,240
~
12, 24,
48VDC |
Wall or DIN rail |
COM-2
|
Any true or raised zero signals within the
following ranges:
0-10mA
0-20mA
0-5V |
SPCO |
Single turn dial 0-100% |
Input type (V/mA)
Span
value
High /Low action
Hysteresis |
24VDC |
DIN rail |
107-2
|
Current
0-10mA
0-15mA
0-20mA
4-20mA
Voltage
0-5 V
1-5 V |
SPCO |
Ten-turn precision dial 0-100% |
High/Low action
Hysteresis |
AC 110,200,220,240
~
12, 24,
48VDC |
Wall or DIN rail |
107-2W
|
4-20mA
10-50mA |
SPNO + SPNC |
Ten-turn precision dial 0-100% |
High/Low action
Hysteresis |
Loop powered |
Wall or DIN rail |
112-2-1
 |
Current
0-10mA
0-20mA
4-20mA
Voltage
0-5 V
1-5 V |
DPCO |
Ten-turn precision dials
0-100%
~
Remote set-point option |
High/Low action
Hysteresis |
AC
110,200,220,240
~
12, 24, 48VDC |
Wall or DIN rail |
Dual channel trip amplifiers
|
TYPE |
INPUT |
OUTPUT |
SET_POINTS |
FIELD
RE-RANGE |
POWER |
MOUNTING |
B12-DT
|
Current
version
Any true or raised zero signals within the range:
0-20mA
Voltage version
Any true or raised
zero signals within the range:
0-5 V
|
2x SPCO |
'screw driver slot' trim-pots |
Input
High/Low action
Interlock
function |
AC 110,200,220,240
~
12, 24, 48VDC |
Wall or DIN rail |
B12-DT/K
|
Current
0-10mA
0-20mA
4-20mA
Voltage
0-5 V
1-5 V
etc |
2x SPCO |
Ten-turn precision dials 0-100% |
High/Low action
Interlock
function |
AC 110,200,220,240
~
12, 24, 48VDC |
Wall or DIN rail |
112-2A-2
|
Current
0-10mA
0-20mA
4-20mA
Voltage
0-5 V
1-5 V
Note:
Optional second input |
SPCO + SP
per
channel |
Ten-turn precision dials 0-100% |
High/Low action
Interlock
function
Hysteresis |
AC 110,200,220,240
~
12, 24, 48VDC |
Wall or DIN rail |
Three channel trip amplfier
|
TYPE |
INPUT |
OUTPUT |
MAIN FEATURES |
FIELD
RE-RANGE |
POWER |
MOUNTING |
B12-TT
|
Current
0-10mA
0-20mA
4-20mA
Voltage
0-10 V
0-5 V
|
3x SP |
Monitored channel status
indication
~
4-digit display of monitored variable
~
Programmable
set-points (digital precision)
~
Scaling 0-100%, V, mA or custom
engineering units
~
10 break-point user linearisation |
13 functions set via front
panel keypad and four digit LED display. See trip
amplifier data sheet.
|
Universal
85-260VAC
~
11-30VDC
(12-24VAC)
|
Wall or DIN rail |
| The above functions are also available in the 500-TT Process Display (digital panel meter) |
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