Lee-Dickens trip amplifiers

500 Series
A Block
AA Block
ACT-2V
ACT-SI
ACT-SV
AL Block
APT-35L
B Block
B S/H Block
BD100
BD120
BD130
BD140
BD200
BD300
BD320
BD901
BD902
BM100
BM120
BM130
BM140
BM191
BM191E
BM200
BM303
BM320
BM901
BM902
BM916
BM9431
BM9432
BM9501
BM9502
BM9503
BM9504
BM9505
BU191
C-Block
C1-Block
C600
CSM-1
D-Block
DCC-8
DIN100
DIN120
DIN130
DIN140
DIN200
DIN300
DIN320
DIN350
DIN360
DIN370
DIN380
DIN400
DIN500
DIN700
DIN710
DIN720
E Block
EI400
E1-1C0 / E1-1C3
E1-FREQ
E1-VAR Series
E1-W Series
FTI-1
FTI-1D
G Block
H Block
I Block
IEC61508
J Block
K Block
KK Block
L Block
L900
L900RG Mark II
M Block
MDM-11
MicroDIN
MicroFREQ A-F
MicroFREQ F-A
MicroFREQ F-F
MicroMATH
MIN100
MIN120
MIN130
MIN140
MIN200
MIN300
MIN310
MIN320
MIN350
MIN360
MIN380
MIN400
MIN500
MIN710
MIN720
MIN904
MIN907
MIN908
N Block
P Block
PU700
QC Series
R Block
RTR-2
RTI-2
RTI-2D
RTM-8
RTP-2
RTT-2
RTT-3
S Block
SC200
SEL300
SI300-20
SI300 & SI310
SI320, SI330 & SI340
SIL
T Block
T100
T120
T130
TCI-2
TCI-2D
TCR-2
TCT-3
USD-2
VVH-3
WVT-3
WWH-3

TRIP AMPLIFIERS

Single level trip amplifiers, dual level trip amplifiers, triple level trip amplifiers, quadruple level trip amplifiers.

If the product you require is not available to buy online, please complete the Enquiry Form.

BM100 - Single Level Trip Amplifier - IEC61508 (typically SIL2)

BM100
This replaces the MIN100.

Function: Single Level Trip Amplifier from a single process signal input. The trip action can be arranged so that the Alarm condition can be above (High Trip) or below (Low Trip) the set point, and that the relay can be either normally energised to de-energise in the Alarm condition (Fail-Safe), or normally de-energised to energise in the Alarm condition (Non Fail-Safe).

Power supply: DC powered

 
  Proof Test Interval
SIL Ratings 1 year 6 months
4-20mA Input & High Alarm Trip SIL 2 SIL 2
4-20mA Input & Low Alarm Trip SIL 1 SIL 2
0-10vdc Input & High Alarm Trip SIL 2 SIL 2
0-10vdc Input & Low Alarm Trip SIL 1 SIL 2
Other Inputs (see data sheet) & High Alarm Trip SIL 2 SIL 2
Other Inputs (see data sheet) & Low Alarm Trip SIL 1 SIL 2

This summary applies to BM100's built in Fail Safe mode

BD100 - Single Level Trip Amplifier - IEC61508 (typically SIL2)

BD100
This replaces the DIN100.

Function: Single Level Trip Amplifier from a single process signal input. The trip action can be arranged so that the Alarm condition can be above (High Trip) or below (Low Trip) the set point, and that the relay can be either normally energised to de-energise in the Alarm condition (Fail-Safe), or normally de-energised to energise in the Alarm condition (Non Fail-Safe).

Options include: Double Pole Change Over relays

Power supply: mains powered
  Proof Test Interval
SIL Ratings 1 year 6 months
4-20mA Input & High Alarm Trip SIL 2 SIL 2
4-20mA Input & Low Alarm Trip SIL 2 SIL 2
0-10vdc Input & High Alarm Trip SIL 2 SIL 2
0-10vdc Input & Low Alarm Trip SIL 2 SIL 2
Other Inputs (see data sheet) & High Alarm Trip SIL 2 SIL 2
Other Inputs (see data sheet) & Low Alarm Trip SIL 1 SIL 2

This summary applies to BD100's built in Fail Safe mode

BU191 - Flow Meter Single Level Trip Amplifier - IEC61508 (typically SIL2)

BU191
Function: The BU191 is a universally powered Alarm Unit suitable for use with a number of different VA Flowmeters. It can be configured for use as a Low or a High Flow Alarm, as required. Each different VA Flowmeter will require a different sensor head for mechanical reasons but in all cases the operation of the Alarm Unit is the same. The sensor heads supplied come with 1M of cable for connection to the Alarm Unit. The BU191 has an “Instrument Fault” indication LED (Amber) which is triggered following loss of power or loss of connection to the Head. This LED can only be cleared by restoring power or replacing the head, passing the float from the Alarm State to the Healthy State and pressing the RESET button to initiate the Stable condition. The BU191 incorporates a sensitivity adjustment to cater for different VA Flowmeters.

Power supply: universal
  Proof Test Interval
SIL Ratings 1 year 1 month
With BHRAGK41, BH1100 and BH1300 Sensor Heads SIL 2 SIL 3
A Block - Single Level Trip Amplifier


The A Block is becoming obsolete, therefore please select below as appropriate:

On new projects: A Block (DC Powered) is replaced by the BM100 Buy BM100
A Block (Mains Powered) is replaced by the BD100 Buy BD100

A BlockFor spares purposes: While stocks last, the A Block and other Alphabet Blocks will continue to be available. Alphabet Availability

Function: Single Level Trip Amplifier from a single process signal input. The trip action can be arranged so that the Alarm condition can be above (High Trip) or below (Low Trip) the set point, and that the relay can be either normally energised to de-energise in the Alarm condition (Fail-Safe), or normally de-energised to energise in the Alarm condition (Non Fail-Safe).

Options include: a remote set-point potentiometer; a variable trip differential; a ten-turn set-point potentiometer; and an AC Current or Voltage input.

Power supply: mains powered

Buy A Block

T Block - Single Level Trip Amplifier with Integral Two Wire Transmitter Power Supply

The T Block is becoming obsolete.

While stocks last, the T Block and other Alphabet Blocks will continue to be available. Alphabet Availability


T BlockFunction: Single Level Trip Amplifier that has an on-board transmitter loop power supply. The T Block can be manufactured with either a Low Trip set point (alarm condition below the set point) or a High Trip set point (alarm condition above the set point) and with the relay Fail Safe (energised to de-energise in the alarm condition) or Non-Fail Safe (relay normally de-energised to energise in the alarm condition).

Application Notes: The T Block is ideal for use with the Lee-Dickens loop powered Relative Humidity and Temperature transmitters or with the loop powered head mounting Temperature transmitters detailed elsewhere in this catalogue.

Power supply: mains powered

T100 - Single Level Trip Amplifier


T100 / 110Function: The T100 is a Single Level Trip Amplifier from a single process signal input. The trip action can be arranged so that the Alarm condition can be above (High Trip) or below (Low Trip) the set point, and that the relay can be either normally energised to de-energise in the Alarm condition (Fail-Safe), or normally de-energised to energise in the Alarm condition (Non Fail-Safe).

Options include: a ten-turn set-point potentiometer; a mA retransmitting output; a latching action on the trip relay; an on-board transmitter power supply; a difference between two RTDs input; and a DPDT relay instead of the SPCO relay.

Power supply: mains or DC

T130 - Dual Channel Single Level Trip Amplifier


T120 / 130Function: The T130 is a Dual Channel Single Level Trip Amplifier, i.e. two Single Level Trip Amplifiers on the one board. The trip action can be arranged so that the Alarm conditions can be above (High Trip) or below (Low Trip) each of the set points, and that the relays can be either normally energised to de-energise in the Alarm condition (Fail-Safe), or normally de-energised to energise in the Alarm condition (Non Fail-Safe).

Options include: remote set-point potentiometers; and ten-turn set-point potentiometers.

Power supply: mains or DC

BM120 - Dual Level Trip Amplifier - IEC61508 (typically SIL2)

BM120
This replaces the MIN120.

Function: Dual Level Trip Amplifier from a single process signal input. The trip action can be arranged so that the Alarm condition can be above (High Trip) or below (Low Trip) each of the set points, and that the relays can be either normally energised to de-energise in the Alarm condition (Fail-Safe), or normally de-energised to energise in the Alarm condition (Non Fail-Safe).

Power supply: DC powered

 
  Proof Test Interval
SIL Ratings 1 year 6 months
4-20mA Input & High Alarm Trip SIL 2 SIL 2
4-20mA Input & Low Alarm Trip SIL 1 SIL 2
0-10vdc Input & High Alarm Trip SIL 2 SIL 2
0-10vdc Input & Low Alarm Trip SIL 2 SIL 2
Other Inputs (see data sheet) & High Alarm Trip SIL 2 SIL 2
Other Inputs (see data sheet) & Low Alarm Trip SIL 1 SIL 2

This summary applies to BM120's built in Fail Safe mode
Please note, that for High & Low Alarm trips, the above SIL for Low Alarm Trip should be used

BD120 - Dual Level Trip Amplifier - IEC61508 (typically SIL2)

BD120
This replaces the DIN120.

Function: Dual Level Trip Amplifier from a single process signal input. The trip action can be arranged so that the Alarm conditions can be above (High Trip) or below (Low Trip) the set point, and that the relays can be either normally energised to de-energise in the Alarm condition (Fail-Safe), or normally de-energised to energise in the Alarm condition (Non Fail-Safe).

Power supply: mains powered

 
  Proof Test Interval
SIL Ratings 1 year 6 months
4-20mA Input & High Alarm Trip SIL 2 SIL 2
4-20mA Input & Low Alarm Trip SIL 2 SIL 2
0-10vdc Input & High Alarm Trip SIL 2 SIL 2
0-10vdc Input & Low Alarm Trip SIL 2 SIL 2
Other Inputs (see data sheet) & High Alarm Trip SIL 2 SIL 2
Other Inputs (see data sheet) & Low Alarm Trip SIL 1 SIL 2

This summary applies to BD120's built in Fail Safe mode
Please note, that for High & Low Alarm trips, the above SIL for Low Alarm Trip should be used

AA Block - Dual Level Trip Amplifier

 

The AA Block is becoming obsolete, therefore please select below as appropriate:

On new projects: AA Block (DC Powered) is replaced by the BM120 Buy BM120
AA Block (Mains Powered) is replaced by the BD120 Buy BD120

For spares purposes: While stocks last, the AA Block and other Alphabet Blocks will continue to be available. Alphabet Availability


AA BlockFunction: Dual Level Trip Amplifier from a single process signal input. The trip action can be arranged so that the Alarm conditions can be above (High Trip) or below (Low Trip) each of the set points, and that the relays can be either normally energised to de-energise in the Alarm condition (Fail-Safe), or normally de-energised to energise in the Alarm condition (Non Fail-Safe).

Options include: remote set point potentiometers; ten-turn set-point potentiometers; and an AC Voltage input.

Power supply: mains powered

T120 - Dual Level Trip Amplifier


T120 / 130Function: The T120 is a Dual Level Trip Amplifier from a single process signal input. The trip action can be arranged so that the Alarm conditions can be above (High Trip) or below (Low Trip) each of the set points, and that the relays can be either normally energised to de-energise in the Alarm condition (Fail-Safe), or normally de-energised to energise in the Alarm condition (Non Fail-Safe).

Options include: remote set-point potentiometers; and ten-turn set-point potentiometers, a mA retransmitting output; a latching action on the trip relays; a difference between two RTDs input; and DPDT relays instead of the SPCO relays.

Power supply: mains or DC

BM130 - Triple Level Trip Amplifier


This replaces the MIN130.

BM130Function: Triple Level Trip Amplifier from a single process signal input. The trip action can be arranged so that the Alarm condition can be above (High Trip) or below (Low Trip) each of the set points, and that the relays can be either normally energised to de-energise in the Alarm condition (Fail-Safe), or normally de-energised to energise in the Alarm condition (Non Fail-Safe).

Power supply: DC powered

BD130 - Triple Level Trip Amplifier


BD130This replaces the DIN130.

Function: Triple Level Trip Amplifier from a single process signal input. The trip action can be arranged so that the Alarm condition can be above (High Trip) or below (Low Trip) each of the set points, and that the relays can be either normally energised to de-energise in the Alarm condition (Fail-Safe), or normally de-energised to energise in the Alarm condition (Non Fail-Safe).

Power supply: mains powered

BM140 - Quadruple Level Trip Amplifier


This replaces the MIN140.

BM140Function: Quadruple Level Trip Amplifier from a single process signal input. The trip action can be arranged so that the Alarm condition can be above (High Trip) or below (Low Trip) each of the set points, and that the relays can be either normally energised to de-energise in the Alarm condition (Fail-Safe), or normally de-energised to energise in the Alarm condition (Non Fail-Safe).

Power supply: DC powered

BD140 - Quadruple Level Trip Amplifier


BD140
This replaces the DIN140.

Function: Quadruple Level Trip Amplifier from a single process signal input. The trip action can be arranged so that the Alarm condition can be above (High Trip) or below (Low Trip) each of the set points, and that the relays can be either normally energised to de-energise in the Alarm condition (Fail-Safe), or normally de-energised to energise in the Alarm condition (Non Fail-Safe).

Power supply: mains powered

AL Block - Single Level Latching Trip Amplifier


AL BlockFunction: Single Level Latching Trip Amplifier from a single process signal input. Two separate set points allow for setting of the trip set point at which point the relay will be latched and the release set point at which the relay will be unlatched. The AL Block can be manufactured with either a Low Trip set point or a High Trip set point. In both cases as the signal passes Down (for a Low Trip) or Up (for a High Trip) through the trip set point the relay will be energised and will remain energised until the signal passes back through the release set point when it will be de-energised. The AL Block is ideally suited to maintaining levels in a tank between two pre-set levels either for filling using the Low Trip version or for emptying using the High Trip version.

Power supply: mains powered

Single Level Trip Amplifier

R BlockFunction: The BM9431 is a DIN rail mounting (TS35) Single Level Trip Amplifier monitoring a 4 to 20mA input signal. It has one process trip and additional internal alarm relays/LEDs for "Out of Range Input" and "Power OK/Fail".

The process trip can be configured as a Low or High trip, as required. The trip amplifier is compliant with NAMUR NE43, being able to detect faulty transmitters whose outputs are below 3.8mA or above 20.5mA.

Optional DPCO Contacts on Process Trip.

Power supply: DC powered

Dual Level Trip Amplifier

S Block Function: The BM9432 is a DIN rail mounting (TS35) Dual Level Trip Amplifier monitoring a 4 to 20mA input signal. It has two process trips and additional internal alarm relays/LEDs for "Out of Range Input" and "Power OK/Fail".

Each process trip can be configured as a Low or High trip, as required. The trip amplifier is compliant with NAMUR NE43, being able to detect faulty transmitters whose outputs are below 3.8mA or above 20.5mA.

Power supply: DC powered

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