Reliable field acquisition
Collect 32 control and status signals from sensors, switches, relays, and other digital field devices in one compact module.
BL335
N Series Distributed I/O
Sense. Isolate.
Monitor.
N132x digital input modules provide 32 isolated input channels. Select low-level triggered, high-level triggered, or dry-contact input according to the field signal and common-terminal wiring.
Acquire status signals from sensors, switches, relays, and dry contacts with clear power and per-channel LED indication.
32Digital input channels
3Input signal versions
2 kVrmsElectrical isolation
28.4 mmCompact module width
32-channel inputDI1 to DI32 for field status acquisition.
N1321 / N1322 / N1323Low-level, high-level, and dry-contact versions.
DIN-35 mountBuilt for distributed industrial I/O systems.
Technical specifications
N132x technical specifications.
Models, input logic, wiring requirements, electrical isolation, environmental ratings, dimensions, terminal assignment, and N-Series system compatibility.
32Digital input channels
21 mAInternal bus current at 5 VDC
2 kVrmsElectrical isolation
DIN-35Industrial rail installation
N1321 vs. N1322 vs. N1323
N1321 is low-level triggered, N1322 is high-level triggered, and N1323 is designed for dry-contact input.
| Selection point | N1321 | N1322 | N1323 |
|---|---|---|---|
| Input type | Low-level triggered | High-level triggered | Dry-contact input |
| Logic 1 | +15 to +30 VDC | +15 to +30 VDC | Input shorted to COM |
| Logic 0 | -3 to +5 VDC | -3 to +5 VDC | Input disconnected from COM |
| Common terminal | Connected to power positive | Connected to 0 VDC | Used for contact closure |
| Channels | 32 channels | 32 channels | 32 channels |
Electrical specifications
Electrical and indication data for N1321, N1322, and N1323.
01
ModelsN1321 low-level trigger / N1322 high-level trigger / N1323 dry contact
Digital input channels32 channels, DI1 to DI32
N1321 / N1322 logic levelLogic 1: +15 to +30 VDC; Logic 0: -3 to +5 VDC
N1323 logic levelLogic 1: input shorted to COM; Logic 0: input disconnected from COM
Internal bus power5 VDC, 21 mA at 5 VDC
Electrical isolation2 kVrms
Power indicationLeft P: 24 V power; right P: 3.3 V power; red LED on means normal
Channel indicationDI1 to DI32 green LEDs; on for logic 1 and off for logic 0
Wiring and installation
Connection and mounting data for panel integration.
02
Terminal designSpring-cage terminals; one conductor per spring terminal
Supported conductor typesSolid, stranded, and fine-stranded wire
Multiple-conductor ruleJoin multiple conductors at one point before connection
Wire size0.3 to 2.5 mm² / AWG 22 to 14
Recommended stripping length8 to 9 mm / 0.33 in
Cable requirementUse shielded cable
Terminal assignmentLeft bank: A1/B1 DI1/DI2; A2/B2 DI3/DI4; A3/B3 DI5/DI6; A4/B4 DI7/DI8; A5/B5 DI9/DI10; A6/B6 DI11/DI12; A7/B7 DI13/DI14; A8/B8 DI15/DI16; A9/B9 COM/PE. Right bank: A1/B1 DI17/DI18; A2/B2 DI19/DI20; A3/B3 DI21/DI22; A4/B4 DI23/DI24; A5/B5 DI25/DI26; A6/B6 DI27/DI28; A7/B7 DI29/DI30; A8/B8 DI31/DI32; A9/B9 COM/PE
InstallationIEC 60715 DIN-35 rail mounting
Environmental performance
Operating limits and industrial protection information.
03
Operating temperature-20°C to 55°C
Storage temperature-40°C to 70°C
Relative humidity5% to 95%, non-condensing
Operating altitude0 to 2,000 m
Protection ratingIP20
EMC protectionIEC 61000-4-2 (ESD) Level 2 and IEC 61000-4-5 (Surge) Level 2
Mechanical and system data
Physical dimensions and requirements for an N-Series station.
04
Dimensions28.4 × 104.6 × 74.9 mm
Weight122.2 g
Internal bus8 gold-plated data contacts; communication and system power are provided through the internal bus
Required couplerA suitable N-Series fieldbus coupler, such as a BL210 Series coupler
Station arrangementI/O modules may be combined in different sequences without grouping by module type
Installation sequenceInstall from the coupler left to right; align the module guides, press into position, lock the rail latch, and install an end cover on the final module
RemovalUnlock the rail latch with a flat-blade screwdriver and pull the module away from the DIN rail; data and power contact connections are then disconnected
Clear diagnostics
Two red power indicators and 32 green input LEDs make power and logic status easy to verify during commissioning and troubleshooting.
Part of a platform
N132x is an optional module for the N-Series distributed I/O system and must be used with a suitable fieldbus coupler, such as a BL210 Series coupler.
What makes N132x different
32 inputs. Three signal modes. Industrial reliability.
The N132x combines 32 digital input channels, three signal versions, individual channel LEDs, 2 kVrms isolation, spring-cage wiring, and industrial EMC protection.
32-channel acquisition
Acquire DI1 to DI32 control and status signals from industrial field devices in a compact 28.4 mm-wide module.
Three input types
Select N1321 for low-level triggering, N1322 for high-level triggering, or N1323 for dry-contact signals.
Spring-cage wiring
Connect solid, stranded, or fine-stranded conductors from 0.3 to 2.5 mm² using secure spring-cage terminals.
Industrial-grade design
2 kVrms isolation, IP20 protection, EMC protection, and -20°C to 55°C operation.
N132x models
Choose the required input signal mode.
N1321 provides low-level triggered input, N1322 provides high-level triggered input, and N1323 accepts dry-contact signals.
N1321 · Low-Level Trigger
Common terminal connected to power positive
Designed for 32-channel low-level triggered digital input. Logic 1 is +15 to +30 VDC and logic 0 is -3 to +5 VDC.
32Input channels
2 kVrmsElectrical isolation
+15 to +30 VDCLogic 1 condition
DI1–DI32Individual LED indicators
Field deviceInput module
Sensor / contact
Low level
N1321 · Common terminal to power positive
Connection and installation
Terminal assignment and module installation.
Use the defined DI, COM, and PE terminals, then install the module on a compliant DIN-35 rail as part of the N-Series station.
Terminal assignment
Left bank A1 / B1 to A4 / B4DI1 / DI2 through DI7 / DI8.
Left bank A5 / B5 to A9 / B9DI9 / DI10 through DI15 / DI16, then COM / PE.
Right bank A1 / B1 to A4 / B4DI17 / DI18 through DI23 / DI24.
Right bank A5 / B5 to A9 / B9DI25 / DI26 through DI31 / DI32, then COM / PE.
Installation and internal bus
Rail and sequenceMount on an IEC 60715 DIN-35 rail and assemble modules from the coupler left to right.
Insert the moduleAlign the spring tongues with the groove, keep the rail latch unlocked, press the module into position, and lock the latch.
Data and power contactsEight gold-plated data contacts provide communication and system power through the internal bus.
End cover and removalInstall an end cover on the final module. To remove a module, lift the rail latch with a flat-blade screwdriver and pull it away from the rail.
Use shielded cable, one conductor per spring terminal, 0.3 to 2.5 mm² wire, and an 8 to 9 mm stripping length.
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)
-
N116316CH DI Module (Dry Contact)
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N1321N132x32CH DI Module (Low-Level Trigger / NPN)
-
N1322N132x32CH DI Module (High-Level Trigger / PNP)
-
N1323N132x32CH 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)
-
N232132CH DO Module (PNP)
-
N232232CH DO Module (NPN)
3 modules
AI
Analog input options for current and voltage acquisition.
-
N30464CH 16-bit AI Module, Differential Input, ±5V / ±10V
-
N30818CH 16-bit AI Module, Single-Ended Input, 0/4-20mA
-
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.
-
N50414CH RTD Module, three-wire PT100
-
N50424CH RTD Module, three-wire PT1000
-
N50434CH RTD Module, four-wire PT100
-
N50444CH 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.
Recommended users
Who should use the N132x digital input module?
N132x fits distributed I/O installations that require compact, isolated 32-channel acquisition of voltage-level or dry-contact signals.
Maintenance teams
Use the individual DI indicators to check field status and quickly locate sensor or wiring problems.
System integrators
Select the correct low-level, high-level, or dry-contact version for each field-device wiring requirement.
OEM manufacturers
Standardize sensor, switch, relay, and dry-contact monitoring in machines and automation equipment.
Distributed I/O projects
Use N132x with a suitable N-Series fieldbus coupler, such as a BL210 Series coupler.
