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Allen-Bradley

Allen-Bradley 1746-NO4I SLC 500 Analog Output Module

SKU 1746-NO4I

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12-month warranty
Free returns within 30 days

Manufacturer: Allen-Bradley
Product No.: 1746-NO4I
Origin United States
Product Type: Analog Output Module
Barcode: 8537101190
Payment: T/T, Western Union
Weight: 0.2 kg
Dimensions: 145 mm x 35 mm x 130 mm (H x W x D)
Shipping port: Xiamen
Warranty: 12 months

Product Documentation

Technical Datasheet (PDF) Complete specifications and technical drawings.

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Product Description

Description

The 1746-NO4I is a 4-channel current analog output module designed for use within SLC 500 automation control systems. It provides 4 non-isolated current output channels that convert 16-bit binary values from the SLC processor into continuous analog current signals. The module operates using backplane power from the 1746 chassis or through an external user-supplied 24V DC power supply to reduce backplane power supply loading. Connection to field devices is established via a 18-point removable terminal block.

Features

Features 4 non-isolated current output channels.
Configurable power source selection using an onboard DIP switch (SW1) for backplane or external 24V DC power.
Communicates with the processor using 16-bit Two's Complement Binary data format.
Supports field wiring to backplane isolation rated at 500V DC.
Includes a removable terminal block for convenient maintenance and module replacement.
Front panel features a Power Status LED that indicates when backplane power is active.

Applications

Analog current loop control driving field control elements.
Variable frequency drive speed reference signal generation.
Control valve positioning and proportional actuator interfacing.
Industrial process control loops utilizing 4 to 20 mA or 0 to 20 mA current signals.

Technical Specifications

Parameter	Specification
Manufacturer	Allen-Bradley / Rockwell Automation
Catalog Number	1746-NO4I
Module Type	Analog Output Module
Output Channels	4 current channels (not individually isolated)
Output Range (Normal)	0 to +20 mA
Overrange Capability	5% (0 to +21 mA - 1 LSB)
Data Format	16-Bit Two's Complement Binary
Converter Resolution	14 bit
Output Resolution	2.56348 uA per LSB
Non-linearity	0.05%
Conversion Method	R-2R Ladder
Step Response	2.5 ms (at 95%)
Load Range	0 to 500 Ohms
Maximum Load Reactance	100 uH
Backplane Isolation	500V DC (Field Wiring to Backplane)
Backplane Current (5V DC)	55 mA
Backplane Current (24V DC)	195 mA
External 24V DC Power Requirement	24V DC +/-10% at 195 mA max. (21.6 to 26.4V DC)
Update Time	512 us for all channels in parallel
Recommended Cable	Shielded Belden 8761
Maximum Wire Size	#14 AWG (maximum)
Terminal Block	Removable
Operating Temperature	0 to +60 degC (+32 to +140 degF)
Storage Temperature	-40 to +85 degC (-40 to +185 degF)
Relative Humidity	5 to 95% (non-condensing)
Noise Immunity	NEMA Standard ICS 2-230

Connections/Interfaces

Connector Pin	Function
0	OUT 0
1	ANL COM
2	OUT 1
3	ANL COM
4	OUT 2
5	ANL COM
6	OUT 3
7	ANL COM
8	+24V DC (External Power Connection)
9	DC COM (External Power Connection)

Installation Guidelines

Power Interruption: Disconnect power from the SLC 500 system and external sources before installing, removing, or wiring the module.
Power Selection: Set the onboard DIP switch (SW1) to UP when using an external 24V DC power source, or DOWN to power the module from the chassis backplane.
Chassis Mounting: Align the module circuit board with the chassis card guides and slide the module into the slot until top and bottom retaining clips snap in place.
Slot Placement: Position the module in a chassis slot away from AC or high-voltage DC modules and away from the system power supply to reduce noise exposure.
Wiring Practice: Use Belden 8761 shielded twisted-pair cable for signal wiring. Ground the drain wire and foil shield at the load end, or at the chassis mounting tab if grounding at the load is not feasible.
Terminal Block Installation: Secure connections on the removable terminal block using a maximum torque of 0.57 Nm (5 lb-in). Do not jumper unused output terminals.

Compliance and Certifications

CULUS C-UL Listed Industrial Control Equipment
CE Marked for all applicable directives
C-Tick Marked for all applicable acts
Functional Safety TUV certified according to DIN V 19250 and IEC 61508 (1002D, AK 1 to 6, SIL 1 to 3)
Category 1 to 4 according to EN954-1

Shipping & Returns

Global Express Shipping

Standard Delivery: 4–6 business days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our technical warranty.

FAQ

What power source options are available for the module?

The module can draw power directly from the backplane or use an external user-supplied 24V DC power supply configured via DIP switch SW1.

What type of signal cable is recommended for output connections?

Shielded Belden 8761 cable is recommended for wiring the analog output channels.

What is the acceptable load resistance range for the current output channels?

The current output channels support a load resistance range between 0 and 500 Ohms.

Does the module require field calibration upon installation?

No, the device is factory calibrated prior to shipment.

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