4-channel RTD input
The module provides RTD1 through RTD4 and supports PT100 or PT1000 sensors through 3-wire or 4-wire model options.
BL335
N Series Distributed I/O
Measure. Isolate.
Convert.
N504x provides 4 RTD input channels for PT100 or PT1000 sensors. Depending on the model, connect 3-wire or 4-wire sensors through RTD1 to RTD4.
Each channel input is electrically isolated and converted to a digital signal with 15-bit resolution, ±1°C accuracy under the stated cable condition, and a 400 ms conversion rate.
4RTD input channels
15 BitSignal resolution
±1°CSpecified accuracy
400 msConversion rate
4 RTD channelsRTD1 through RTD4.
PT100 / PT10003-wire or 4-wire sensor options.
DIN-35 mountFor distributed fieldbus I/O systems.
Technical specifications
N504x technical specifications.
RTD input types, measurement ranges, resolution, accuracy, conversion rate, wiring requirements, environmental ratings, dimensions, terminal definitions, and distributed I/O system requirements.
4RTD input channels
15 BitSignal resolution
±1°CSpecified accuracy
DIN-35Industrial rail installation
3-wire vs. 4-wire N504x models
N5041/N5042 are 3-wire RTD models, while N5043/N5044 are 4-wire RTD models. PT100 and PT1000 variants are available in both wiring types.
| Selection point | 3-wire models | 4-wire models |
|---|---|---|
| Models | N5041 / N5042 | N5043 / N5044 |
| Sensor type | PT100 / PT1000 | PT100 / PT1000 |
| Channels | 4 channels | 4 channels |
| Resolution | 15 Bit | 15 Bit |
| Conversion rate | 400 ms | 400 ms |
Electrical specifications
RTD input, conversion, power, and indication data for the N504x series.
01
ModelsN5041 / N5042 / N5043 / N5044
RTD input channels4 channels, RTD1 to RTD4
Input types3-wire or 4-wire PT100 or PT1000
PT100 measurement range-200°C to 850°C
PT1000 measurement range-50°C to 300°C
Resolution15 Bit
Accuracy±1°C, within 20 m, AWG16 shielded cable
Conversion rate400 ms
Internal bus power5 VDC, 31 mA at 5 VDC
Power indicationLeft P: 24 V power indicator; right P: 3.3 V power indicator; red LED on means power normal
Channel indicationPanel positions 1 to 16 are reserved
Wiring and installation
Connection and mounting data for the N504x module.
02
Terminal designCage-clamp connections; one conductor per cage clamp
Supported conductor typesSolid, stranded, and fine-stranded conductors
Multiple-conductor ruleJoin multiple conductors into a single point before connection
Conductor diameter0.3 to 2.5 mm² / AWG 22 to 14
Strip length8 to 9 mm / 0.33 in
Cable recommendationShielded cables are recommended
3-wire terminalsA1 FC1+, A2 RTD1+, A3 RTD1-, A4 NC; B1 FC2+, B2 RTD2+, B3 RTD2-, B4 NC; A5 FC3+, A6 RTD3+, A7 RTD3-, A8 NC; B5 FC4+, B6 RTD4+, B7 RTD4-, B8 NC; A9/B9 PE
4-wire terminalsA1 FC1+, A2 RTD1+, A3 RTD1-, A4 FC1-; B1 FC2+, B2 RTD2+, B3 RTD2-, B4 FC2-; A5 FC3+, A6 RTD3+, A7 RTD3-, A8 FC3-; B5 FC4+, B6 RTD4+, B7 RTD4-, B8 FC4-; A9/B9 PE
InstallationIEC 60715 DIN-35 rail mounting
Environmental performance
Operating limits and protection information stated in the manual.
03
Operating temperature-20°C to 55°C
Storage temperature-40°C to 70°C
Relative humidity5%RH to 95%RH, non-condensing
Operating altitude0 to 2,000 m
Protection typeIP20
EMCIEC 61000-4-2 (ESD) Level 2 and IEC 61000-4-5 (Surge) Level 2
Mechanical and system data
Physical dimensions and distributed I/O system requirements.
04
Dimensions15.4 × 104.6 × 74.9 mm
Weight71.2 g
Internal bus8 data contacts; gold-plated contacts are self-cleaning before connection
Required couplerA suitable fieldbus coupler, such as a BL210 Series coupler
Station arrangementI/O modules may be arranged in any combination without grouping by module type
Installation sequenceStarting from the fieldbus coupler, assemble I/O modules from left to right; insert from the right and top along the module guide rails; install an end cap on the last module
RemovalUse a flat-head screwdriver or similar tool to pry the rail clip upward, then pull the module away from the DIN rail
Electrically isolated channels
Each channel input is electrically isolated before conversion into a digital signal transmitted with 15-bit resolution.
Distributed I/O module
N504x is an optional N-Series I/O module and must be combined with a suitable coupler, such as a BL210 Series coupler.
N504x RTD input characteristics
4 RTD inputs. PT100 or PT1000. 3-wire or 4-wire.
N504x combines four isolated RTD input channels, PT100/PT1000 options, 15-bit resolution, ±1°C specified accuracy, a 400 ms conversion rate, cage-clamp wiring, and stated EMC protection.
4-channel acquisition
Connect RTD1 through RTD4 in one 15.4 mm-wide module.
3-wire or 4-wire
Select N5041/N5042 for 3-wire sensors or N5043/N5044 for 4-wire sensors.
15-bit conversion
RTD input signals are converted to digital values with 15-bit resolution and a 400 ms conversion rate.
Specified environment
IP20 protection, IEC 61000-4-2 and IEC 61000-4-5 Level 2 EMC, and -20°C to 55°C operation.
N504x model selection
Choose 3-wire or 4-wire PT100/PT1000 input.
N5041 is 3-wire PT100, N5042 is 3-wire PT1000, N5043 is 4-wire PT100, and N5044 is 4-wire PT1000. Every model provides four RTD channels.
N5041 / N5042 · 3-Wire RTD
PT100 / PT1000 acquisition
N5041 supports 3-wire PT100 and N5042 supports 3-wire PT1000. Both models provide 4 RTD input channels with 15-bit resolution and a 400 ms conversion rate.
4RTD input channels
15 BitSignal resolution
PT100 / PT1000RTD sensor type
RTD1–RTD4Input channels
RTD sensorRTD input module
Sensor
3-wire RTD
N5041 / N5042 · 3-wire PT100 / PT1000
Connection and installation
Terminal definitions and module installation.
Use the FC, RTD, NC, and PE terminal definitions for the selected wiring type, and install the module on a compliant DIN-35 rail as part of the distributed I/O station.
Terminal definitions
Channels 1 and 2A1/A2/A3 are FC1+/RTD1+/RTD1-; B1/B2/B3 are FC2+/RTD2+/RTD2-.
Channels 3 and 4A5/A6/A7 are FC3+/RTD3+/RTD3-; B5/B6/B7 are FC4+/RTD4+/RTD4-.
3-wire vs. 4-wireA4/B4/A8/B8 are NC for 3-wire models and FC1-/FC2-/FC3-/FC4- for 4-wire models.
Protective earthA9 and B9 are PE.
Installation and internal bus
Rail and sequenceMount on a DIN 35 rail compliant with IEC 60715 and assemble modules from the fieldbus coupler left to right.
Insert the moduleAlign the spring contact with the groove, keep the rail clip unlocked, press the module into position until it snaps onto the rail, then lock the rail clip.
Data contactsEight gold-plated, self-cleaning data contacts provide communication and system power through the internal bus.
End cap and removalInstall an end cap on the last module. To remove a module, pry the rail clip upward with a flat-head screwdriver or similar tool and pull the module away from the DIN rail.
Use 0.3 to 2.5 mm² / AWG 22 to 14 conductors, strip 8 to 9 mm / 0.33 in, and use shielded cables as recommended.
N-Series module family
More N-Series I/O module options.
The N-Series includes digital input, digital output, analog input, analog output, RTD, temperature, pulse, and power modules.
I/O modules can be arranged in different combinations within the distributed I/O station without grouping them by module type.
26 modules · 8 categories
6 modules
DI
Digital input options for NPN, PNP, and dry-contact sensing.
-
N116116CH DI Module (Low-Level Trigger / NPN)
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N116216CH DI Module (High-Level Trigger / PNP)
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N116316CH DI Module (Dry Contact)
-
N132132CH DI Module (NPN)
-
N132232CH DI Module (PNP)
-
N132332CH DI Module (Dry Contact)
5 modules
DO
Digital and relay output options for discrete control.
-
N20848CH Relay Output Module
-
N216116CH DO Module (PNP)
-
N216216CH DO Module (NPN)
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N232132CH DO Module (PNP)
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N232232CH DO Module (NPN)
3 modules
AI
Analog input options for current and voltage acquisition.
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N30464CH 16-bit AI Module, Differential Input, ±5V / ±10V
-
N30818CH 16-bit AI Module, Single-Ended Input, 0/4-20mA
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N30838CH 16-bit AI Module, Single-Ended Input, 0-5V / 0-10V
2 modules
AO
Analog output options for current and voltage control.
-
N40818CH 16-bit AO Module, 0/4-20mA Output
-
N40868CH 16-bit AO Module, ±5V / ±10V Output
4 modules
RTD
RTD modules for PT100 and PT1000 temperature sensing.
-
N5041N504x4CH RTD Module, three-wire PT100
-
N5042N504x4CH RTD Module, three-wire PT1000
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N5043N504x4CH RTD Module, four-wire PT100
-
N5044N504x4CH RTD Module, four-wire PT1000
2 modules
Temperature
Dedicated temperature modules for NTC and thermocouple signals.
-
N50858CH NTC Module
-
N50888CH TC Module
3 modules
Pulse
Pulse counting and pulse-output control modules.
-
N90813CH Pulse Counter + 5×DI
-
N90826CH Pulse Output + 2×DO
-
N90832CH Pulse Output (Pulse Count Control) + 4×DI + 2×DO
1 module
Power
Additional power support for larger N-Series stations.
-
N7021Power Module
Important system note
When the number of selected N-Series I/O boards exceeds 20, an additional power module is required. If the number is less than 20, no extra power module is needed.
Installation and wiring
Key operating steps from the N504x manual.
The manual specifies the installation sequence, module insertion and removal procedure, cable selection rules, and wiring examples for N5041 through N5044.
Installation sequence
Mount the coupler and I/O modules on a DIN 35 rail compliant with IEC 60715, then assemble modules from the fieldbus coupler left to right.
Inserting a module
Align the spring contact with the groove, keep the rail clip unlocked, press the module into position until it snaps onto the rail, and lock the rail clip.
Removing a module
Use a flat-head screwdriver or similar tool to pry the rail clip upward, then pull the I/O module away from the DIN rail.
Cable selection
Cage clamps accept solid, stranded, and fine-stranded conductors. Use one conductor per clamp, 0.3 to 2.5 mm² / AWG 22 to 14, with an 8 to 9 mm strip length.
