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Intrinsically safe signal conditioners
for hazardous area applications
ACT20X – Overview
ACT20X – Universal, intrinsically safe signal conditioners
for hazardous area applications
PC-configurable conditioners family for hazardous areas
in the new Weidmüller electronics housing for installation
in safe or hazardous areas of Zone 2
B
The ACT20X products fulfil the strict standards of the hazardous
area industries and process signals from various Ex zones
(Zones 0, 1, 2) for the control system.
ACT20X can be used universally. On the input side, the ACT20X
can process HART® input signals, DC, RTD, thermocouple or
B.4
NAMUR signals from the Ex area. On the output side, field
devices in the Ex area are controlled via the ACT20X with
analogue or digital signals. All ACT20X products are
characterised by insulation, accuracy and high temperature
stability.
The 2-channel versions with width of 22.5 mm are available
with either transistor or relay output. Due to this high component
density, the space requirements and installation costs are
reduced accordingly.
Intrinsically safe signal conditioners
for hazardous area applications
ACT20X – Overview
Configuration via FDT
All modules can be quickly and
conveniently configured with
manufacturer-independent FDT/DTM
software.
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B
Worldwide application
Fulfils the strict standards and requirements of the process industry. Can be
used worldwide due to international and
local approvals ATEX, IECEX, CULUS,
FM, GOST and DNV.
Intelligent connection system
Pluggable, coded, with release lever.
The release lever simplifies maintenance
and allows the disconnection without
damaging the cables.
Alarm function
No laborious troubleshooting. Alarm
function integrated for cable or sensor
errors. In case of failures, a diagnostic
signal is sent to the control system.
Robust
+60 °C
to
–20 °C
Wide ambient temperature range from
–20 °C ... +60 °C.
B.5
NAMUR isolating switching amplifier: with relay output
The ACT20X-HDI-SDO-RNO (NC) isolating switching amplifier is a specialized signal
isolating converter for Namur sensor signals or for simple switching signals from the
Ex Zone 0. A single relay, available optionally as NC or NO, provides the output signal
in the safe zone. Single-channel or double-channel versions are also available.
Connection diagram: ACT20X HDI-SDO-RNC
Ex label
Input Signals
Output Signals
ATEX
II 3 G Ex nA nC IIC T4
II (1) G [Ex ia] IIC/IIB/IIA
Channel 1:
NAMUR
Mechanical
switch
+
Rs
Rp
–
Rp
14
44
13
43
12
42
11
41
+
24
51
23
52
22
53
21
54
Rs
Rp
–
II (1) D [Ex iaD]
IECEx
Ex nA nC IIC T4 Gc
Relay
Channel 2:
N.O. or N.C.
[Ex ia Ga] IIC/IIB/IIA
Relay
[Ex ia Da] IIIC
FM
Installation in CL I DIV2 GP A-D T4
Relay
Channel 1:
N.O. or N.C.
Protects Ex circuits, in compliance with
Cl. I-III ABT 1/2 GP A-G or
Cl. I Zn2 AEx/Ex nA nC [ia] IIC T4.
Relay
Power Supply
Mechanical
switch
NAMUR
Channel 2:
Intrinsically safe signal conditioners
for hazardous area applications
B
ACT20X
Rp
Gnd. –
Supply +19.2...31.2 V DC
Module status
N.C.
Module status
Zone 2 / FM Cl. 1,
div. 2, gr. A-D o safe area
Zone 0, 1, 2, 20, 21, 22 /
Cl. I/II/III, div. 1 gr. A-G
Application: monitoring of fill level with the ACT20X HDI-SDO-RNO
(relay output)
EX Zone
Safe zone
A.C. supply
Control
+24 V DC
0V
Fi l level is high,
intrinsically safe Namur
or mechanical switch
PS
Channel 1 digital input
Channel 1 digital output
Channel 2 digital input
Channel 2 digital output
ACT20X-2HDI-2SDO-RNO
B.6
-
Other converter
Zone 0
Tank
Power
supply
+
F ll level is low,
intrinsically safe Namur
or mechanical switch
Note
NAMUR isolating switching amplifier
• Converts intrinsically safe digital signals
(NAMUR / switching contact) from EX Zone 0
into digital output signals (relay output) for the
safe zone
• PC configuration with FDT/DTM software,
download at www.weidmueller.com
• Relay output for error alarm
• 1 or 2 channels in one module
ACT20X-HDI-SDO-RNO-S / RNC-S
ACT20X-2HDI-2SDO-RNO-S / RNC-S
With relay output
Intrinsically safe signal conditioners
for hazardous area applications
ACT20X
B
PS
Technical data
Input
Sensor
NAMUR sensor, according to EN60947, Switch with or without RS, RP
8 V DC / 8 mA
RP = 750 Ω / RS = 15kΩ
0...5 kHz
> 0.1 ms
1 kΩ
< 1.2 mA /
< 0.1 mA, > 6.5 mA (in case of wire break)
Sensor supply
Resistance
Input frequency
Pulse duration
Input resistance
Triggerlevel low / Triggerlevel high
Output signal in case of wire break
Output
Type
Rated switching voltage
Relay, 1 or 2 NO / NC (potential-free)
≤ 250 V AC / 30 V DC (safe area)
≤ 32 V AC / 32 V DC (Zone 2)
≤ 2 A AC/DC (safe area, Zone 2 area)
≤ 500 VA / 60 W (safe area)
≤ 16 VA / 32 W (Zone 2)
Continuous current
Power rating
Alarm output
Type
Nominal switching voltage
Relay, 1 NO (voltage-free)
≤ 125 V AC / 110 V DC (safe area)
≤ 32 V AC / 32 V DC (Zone 2)
≤ 0.5 A AC / 1 A DC (safe area, Zone 2)
≤ 62.5 V AC / 32 W (safe area)
Continuous current
Power rating
≤ 16 VA / 32 W (Zone 2)
General data
Supply voltage
NAMUR supply
Power consumption
Tightening torque, min. / Tightening torque, max.
Ambient temperature / Storage temperature
Approvals
Approvals
Insulation coordination
Insulation voltage
Rated voltage
EMC standards
Data for Ex applications (ATEX)
Voltage U0
Current I0
Power P0
19…31.2 V DC
8 V DC / 8 mA
≤ 3 W (2 channels)
0.4 Nm / 0.6 Nm
-20 °C...+60 °C / -20 °C...+85 °C
cULus; CE; ATEX; IECEX; FM
2.6 kV (input / output)
300 V
DIN EN 61326
10.6 V DC
12 mA DC
32 W
Ordering data
Type
Qty.
Order No.
1-channel version, NO
ACT20X-HDI-SDO-RNO-S
1
8965340000
1
8965350000
1
8965370000
1
8965380000
1-channel version, NC
ACT20X-HDI-SDO-RNC-S
2-channel version, NO
Dimensions
Clamping range (nominal / min. / max.)
Length x width x height
Note
mm²
mm
Screw connection
2.5 / 0.5 / 2.5
119.2 / 22.5 / 113.6
ACT20X-2HDI-2SDO-RNO-S
2-channel version, NC
ACT20X-2HDI-2SDO-RNC-S
CBX200 USB configuration interface - 8978580000
B.7
NAMUR isolating switching amplifier: with NPN transistor output
The ACT20X-HDI-SDO isolating switching amplifier is a specialized signal isolating
converter for Namur sensor signals or for simple switching signals from the Ex Zone 0.
A plus-switching (NPN) transistor provides the output signal in the safe zone. Singlechannel or double-channel versions are also available.
Connection diagram: ACT20X HDI-SDO
Ex label
Input Signals
Output Signals
ATEX
II 3 G Ex nA nC IIC T4
II (1) G [Ex ia] IIC/IIB/IIA
Mechanical
switch
Channel 1:
NAMUR
+
–
44
13
43
II (1) D [Ex iaD]
IECEx
Ex nA nC IIC T4 Gc
Opto +
Channel 2:
Rs
Rp
14
Rp
12
42
11
41
[Ex ia Ga] IIC/IIB/IIA
Opto –
[Ex ia Da] IIIC
FM
Installation in CL I DIV2 GP A-D T4
Opto +
Channel 1:
+
24
51
23
52
22
53
21
54
Rs
Rp
–
Protects Ex circuits, in compliance with
Cl. I-III ABT 1/2 GP A-G or
Opto –
Cl. I Zn2 AEx/Ex nA nC [ia] IIC T4.
Power Supply
Mechanical
switch
NAMUR
Channel 2:
Intrinsically safe signal conditioners
for hazardous area applications
B
ACT20X
Rp
Gnd. –
Supply +19.2...31.2 V DC
Module status
N.C.
Module status
Zone 2 / FM Cl. 1,
div. 2, gr. A-D o safe area
Zone 0, 1, 2, 20, 21, 22 /
Cl. I/II/III, div. 1 gr. A-G
Application: monitoring the fill level with isolating switching amplifier
EX Zone
Safe zone
A.C. supply
Control
+24 V DC
0V
Fi l level is high,
intrinsically safe Namur
or mechanical switch
PS
Channel 1 digital input
Channel 1 digital output
Channel 2 digital input
Channel 2 digital output
ACT20X-2HDI-2SDO
B.8
-
Other converter
Zone 0
Tank
Power
supply
+
F ll level is low,
intrinsically safe Namur
or mechanical switch
Note
NAMUR isolating switching amplifier
• Converts intrinsically safe digital signals
(NAMUR / switching contact) from EX Zone 0
into digital output signals (transistor output) for
the safe zone
• PC configuration with FDT/DTM software,
download at www.weidmueller.com
• Relay output for error alarm
• 1 or 2 channels in one module
ACT20X-HDI-SDO-S / 2HDI-2SDO-S
with transistor output
Intrinsically safe signal conditioners
for hazardous area applications
ACT20X
B
PS
Technical data
Input
Sensor
NAMUR sensor, according to EN60947, Switch with or without RS, RP
8 V DC / 8 mA
RP = 750 Ω / RS = 15kΩ
0...5 kHz
> 0.1 ms
1 kΩ
< 1.2 mA / > 2.1 mA
< 0.1 mA, > 6.5 mA (in case of wire break)
Sensor supply
Resistance
Input frequency
Pulse duration
Input resistance
Triggerlevel low / Triggerlevel high
Output signal in case of wire break
Output
Type
Switching frequency
Pulse duration
Rated switching voltage
Power rating
Voltage drop at max. load
Alarm output
Type
Nominal switching voltage
NPN transistor output
5 kHz
60 µs
≤ 30 V DC
≤ 80 mA / ≤ 2.4 W
< 2.5 V DC
Relay, 1 NO (voltage-free)
≤ 125 V AC / 110 V DC (safe area)
≤ 32 V AC / 32 V DC (Zone 2)
≤ 0.5 A AC / 1 A DC (safe area, Zone 2)
≤ 62.5 V AC / 32 W (safe area)
≤ 16 VA / 32 W (Zone 2)
Continuous current
Power rating
General data
Supply voltage
NAMUR supply
Power consumption
Tightening torque, min. / Tightening torque, max.
Ambient temperature / Storage temperature
Approvals
Approvals
Insulation coordination
Insulation voltage
Rated voltage
EMC standards
Data for Ex applications (ATEX)
Voltage U0
Current I0
Power P0
19…31.2 V DC
8 V DC / 8 mA
≤ 3 W (2 channels)
0.4 Nm / 0.6 Nm
-20 °C...+60 °C / -20 °C...+85 °C
cULus; CE; ATEX; IECEX; FM
2.6 kV (input / output)
300 V
DIN EN 61326
10.6 V DC
12 mA DC
32 W
Ordering data
Type
Qty.
Order No.
1-channel version
ACT20X-HDI-SDO-S
1
8965360000
1
8965390000
2-channel version
ACT20X-2HDI-2SDO-S
Dimensions
Clamping range (nominal / min. / max.)
Length x width x height
Note
mm²
mm
Screw connection
2.5 / 0.5 / 2.5
119.2 / 22.5 / 113.6
CBX200 USB configuration interface - 8978580000
B.9
Solenoid driver for ignition protection IIC, 35 mA
The ACT20X-SDI-HDO solenoid driver has an input in the safe zone and an output in
the Ex zone 0. This driver is suitable for switching solenoid valves or alarm transmitters.
It is optionally available in a single-channel or double-channel version.
Connection diagram: ACT20X SDI-HDO
Ex label
Ex Output Signals
Solenoid
Channel 1:
Alarm
ATEX
II 3 G Ex nA nC IIC T4
Input Signals
+V
14
44
13
43
12
42
11
41
+V
II (1) G [Ex ia] IIC/IIB/IIA
II (1) D [Ex iaD]
IECEx
Ex nA nC IIC T4 Gc
+V
+V
[Ex ia Ga] IIC/IIB/IIA
[Ex ia Da] IIIC
FM
Installation in CL I DIV2 GP A-D T4
Protects Ex circuits, in compliance with
Cl. I-III ABT 1/2 GP A-G or
Cl. I Zn2 AEx/Ex nA nC [ia] IIC T4.
Power Supply
Alarm
Solenoid
Channel 2:
Intrinsically safe signal conditioners
for hazardous area applications
B
ACT20X
24
51
23
52
22
53
21
54
Gnd. –
+19.2...31.2 V DC
Module status
N.C.
Zone 0, 1, 2, 20, 21, 22 /
Cl. I/II/III, div. 1 gr. A-G
Module status
Zone 2 / Cl. 1, div. 2,
gr. A-D or safe area
Application: Inflow control in Ex zone with ignition protection group IIC
A.C. supply
Safe zone
Control system
DC
Power
supply
EX Zone
Ignition protection group IIC
Output data: Solenoid driver
for ignition protection group IIC (< 35 mA)
Connection terminal
Channel 1
U without load U with load
11-12
Min. 24 V
Min. 12.5 V
I max
35 mA
11-13
Min. 24 V
Min. 13.5 V
35 mA
11-14
Note
Min. 24 V
Min. 14.5 V
35 mA
Ex alarm siren
+
19.2-31.2 V DC
for ignition protection group IIC (< 35 mA)
Alarm signal
PS
Channel 1 digital output
Channel 1 digital input
Channel 2 digital output
Channel 2 digital input
Zone 0
ACT20X-2SDI-2HDO
Valve open/closed
signal
B.10
Note
Solenoid valve
Tank
Connection terminal
Channel 2
U without load U with load
21-22
Min. 24 V
Min. 12.5 V
I max
35 mA
21-23
Min. 24 V
Min. 13.5 V
35 mA
21-24
Note
Min. 24 V
Min. 14.5 V
35 mA
Solenoid driver
ACT20X-SDI-HDO / 2SDI-2HDO
• The solenoid driver controls intrinsically safe
valves, LEDs, acoustic alarms, etc.
• PC configuration with FDT/DTM software,
download at www.weidmueller.com
• Output current is limited to 35 mA for gas group
IIC
• 1 or 2 channels in one module
• Relay output for error alarm
For gas group IIC 35 mA
Intrinsically safe signal conditioners
for hazardous area applications
ACT20X
B
PS
Technical data
Input
Type
Input voltage
Input resistance, voltage
Triggerlevel low
Triggerlevel high
Alarm output
Type
Nominal switching voltage
NPN, PNP switching signal
≤ 28 V DC
3.5 kΩ
≤ 2.0 V DC (NPN), ≤ 8.0 V DC (PNP)
≥ 4.0 V DC (NPN), ≥ 10V DC (PNP)
Relay, 1 NO (voltage-free)
≤ 125 V AC / 110 V DC (safe area)
≤ 32 V AC / 32 V DC (Zone 2)
≤ 0.5 A AC / 1 A DC (safe area, Zone 2)
≤ 62.5 V AC / 32 W (safe area)
≤ 16 VA / 32 W (Zone 2)
Continuous current
Power rating
General data
Supply voltage
Power consumption
Tightening torque, min. / Tightening torque, max.
Ambient temperature / Storage temperature
Approvals
Approvals
Insulation coordination
Insulation voltage
Rated voltage
EMC standards
Data for Ex applications (ATEX)
Voltage U0
Current I0
Power P0
19…31.2 V DC
≤ 3 W (2 channels)
0.4 Nm / 0.6 Nm
-20 °C...+60 °C / -20 °C...+85 °C
cULus; CE; ATEX; IECEX; FM
2.6 kV (input / output)
300 V
DIN EN 61326
28 V DC
≤ 135 mA
≤ 0.95 W
Ordering data
Type
Qty.
Order No.
1-channel version
ACT20X-SDI-HDO-L-S
1
8965400000
1
8965420000
2-channel version
ACT20X-2SDI-2HDO-S
Dimensions
Clamping range (nominal / min. / max.)
Length x width x height
Note
mm²
mm
Screw connection
2.5 / 0.5 / 2.5
119.2 / 22.5 / 113.6
CBX200 USB configuration interface - 8978580000
B.11
Solenoid driver for ignition protection group IIB, <60 mA
The ACT20X-SDI-HDO solenoid driver has an input in the safe zone and an output in
the Ex zone 0. This driver is suitable for switching solenoid valves or alarm transmitters.
Connection diagram: ACT20X-SDI-HDO, for ignition protection group IIB, <60 mA
Ex Output Signals
Alarm
Solenoid
Channel 1:
Ex label
ATEX
II 3 G Ex nA nC IIC T4
Input Signals
II (1) G [Ex ia] IIC/IIB/IIA
14
II (1) D [Ex iaD]
IECEx
Ex nA nC IIC T4 Gc
44
Not connected
43
13
+V
12
42
11
41
+V
[Ex ia Ga] IIC/IIB/IIA
[Ex ia Da] IIIC
FM
Installation in CL I DIV2 GP A-D T4
Protects Ex circuits, in compliance with
Cl. I-III ABT 1/2 GP A-G or
Cl. I Zn2 AEx/Ex nA nC [ia] IIC T4.
Power Supply
Channel 2:
Intrinsically safe signal conditioners
for hazardous area applications
B
ACT20X
24
51
23
52
22
53
21
54
Not connected
GND –
+19.2...31.2 V DC
Module status
N.C.
Zone 0, 1, 2, 20, 21, 22 /
Cl. I/II/III, div. 1 gr. A-G
Module status
Zone 2 / Cl. 1, div. 2,
gr. A-D or safe area
Application: Inflow control in Ex zone with ignition protection group IIB
A.C. supply
Safe zone
Control system
DC
Power
supply
11-14
Ex alarm siren
Note
19.2-31.2 V DC
Alarm signal
PS
Channel 1 digital input
2x ACT20X-SDI-HDO
PS
Zone 0
Channel 2 digital input
Valve open/closed Solenoid valve
signal
B.12
Output data: Solenoid driver
for ignition protection group IIC (< 60 mA)
Connection terminal
Channel 1
U without load U with load
Min. 9 V
11-12
Min. 24 V
Min. 11.5 V
Min. 12.5 V
11-13
Min. 24 V
Min. 10 V
EX Zone
Zone 1
Ignition protection group IIC
+
Note
Tank
Min. 24 V
I max
60 mA
50 mA
60 mA
50 mA
Min. 11 V
60 mA
Min. 13 V
50 mA
Solenoid driver
ACT20X-SDI-HDO-H-S
• The solenoid driver controls intrinsically safe
valves, LEDs, acoustic alarms, etc.
• PC configuration with FDT/DTM software,
download at www.weidmueller.com
• Output current is limited to 60 mA for gas group
IIB
• Relay output for error alarm
For gas group IIB < 60 mA
Intrinsically safe signal conditioners
for hazardous area applications
ACT20X
B
PS
Technical data
Input
Type
Input voltage
Input resistance, voltage
Triggerlevel low
Triggerlevel high
Alarm output
Type
Nominal switching voltage
NPN, PNP switching signal
≤ 28 V DC
3.5 kΩ
≤ 2.0 V DC (NPN), ≤ 8.0 V DC (PNP)
≥ 4.0 V DC (NPN), ≥ 10V DC (PNP)
Relay, 1 NO (voltage-free)
≤ 125 V AC / 110 V DC (safe area)
≤ 32 V AC / 32 V DC (Zone 2)
≤ 0.5 A AC / 1 A DC (safe area, Zone 2)
≤ 62.5 V AC / 32 W (safe area)
≤ 16 VA / 32 W (Zone 2)
Continuous current
Power rating
General data
Supply voltage
Power consumption
Tightening torque, min. / Tightening torque, max.
Ambient temperature / Storage temperature
Approvals
Approvals
Insulation coordination
Insulation voltage
Rated voltage
EMC standards
Data for Ex applications (ATEX)
Voltage U0
Current I0
Power P0
19…31.2 V DC
≤ 3 W (2 channels)
0.4 Nm / 0.6 Nm
-20 °C...+60 °C / -20 °C...+85 °C
cULus; CE; ATEX; IECEX; FM
2.6 kV (input / output)
300 V
DIN EN 61326
28 V DC
≤ 110 mA
≤ 0.77 W
Ordering data
Type
Qty.
Order No.
1-channel version
ACT20X-SDI-HDO-H-S
Dimensions
Clamping range (nominal / min. / max.)
Length x width x height
Note
mm²
mm
1
8965410000
Screw connection
2.5 / 0.5 / 2.5
119.2 / 22.5 / 113.6
CBX200 USB configuration interface - 8978580000
B.13
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