Selection Guide · Publication 1734-SG001 · Rockwell Automation
Allen-Bradley POINT I/O Modules Selection Guide – Bulletin 1734
This selection guide covers the Allen-Bradley POINT I/O modular I/O system, Bulletin 1734. It documents communication adapter options for EtherNet/IP, ControlNet, DeviceNet, and PROFIBUS DP networks, along with specifications for digital, analog, POINT Guard safety, and specialty I/O modules. The guide also covers terminal bases, expansion power supplies, accessories, and mounting requirements to help engineers configure a complete POINT I/O system.
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Specifications
EtherNet/IP Adapter – 1734-AENT / 1734-AENTK
| Communication rate | 10/100 Mbits/s, half or full-duplex |
|---|---|
| Ethernet ports | 1 |
| Supported topologies | Star, Tree |
| Field power supply | 10…28.8V DC @ 10 A |
| POINTBus output, max | 5V DC @ 1.0 A |
| Power consumption, max | 10.4 W @ 28.8V DC |
| Isolation voltage | 50V continuous, Reinforced insulation; type tested at 500V AC for 60 s |
EtherNet/IP Adapter – 1734-AENTR / 1734-AENTRK
| Ethernet ports | 2, configured as embedded switches |
|---|---|
| Supported topologies | Star, Tree, Daisy-chain/Linear, Ring |
| POINTBus output, max | 5V DC @ 0.8 A |
| Power dissipation, max | 6.3 W @ 28.8V DC |
ControlNet Adapter – 1734-ACNR / 1734-ACNRK
| Communication rate, max | 128K bit/s @ 500 m; 250K bit/s @ 250 m; 500K bit/s @ 100 m |
|---|---|
| Input byte capacity | 248 |
| Output byte capacity | 248 |
| Direct connections supported | 25 |
| Rack connections supported | 5 |
| Power consumption, max | 8.1 W @ 28.8V DC |
| Scheduled transmit memory | 586 bytes |
DeviceNet Adapter – 1734-ADN / 1734-ADNK / 1734-ADNX
| Communication rate, max | 125K bit/s @ 500 m; 250K bit/s @ 250 m; 500K bit/s @ 100 m |
|---|---|
| Input byte capacity | 248 |
| Output byte capacity | 248 |
| Power consumption, max | 8.1 W @ 28.8V DC |
PROFIBUS DP Adapter – 1734-APB
| Field power bus supply voltage range | 10…28.8V DC |
|---|---|
| Field power bus supply current, max | 10 A |
| Isolation voltage | 1250V rms/V AC |
| Power consumption, max | 8.1 W @ 28.8V DC |
Environmental Specifications – Communication and I/O Modules
| Temperature, operating | -20…+55 °C (-4…+131 °F) |
|---|---|
| Temperature, nonoperating | -40…+85 °C (-40…+185 °F) |
| Relative humidity | 5…95% noncondensing |
| Vibration | 5 g @ 10…500 Hz (IEC 60068-2-6) |
| Shock, operating | 30 g (IEC 60068-2-27) |
| Shock, nonoperating | 50 g (IEC 60068-2-27) |
| Enclosure type rating | None (open-style) |
| Mounting type | DIN rail |
Digital AC Input Modules
| Catalog numbers | 1734-IA2, 1734-IA4, 1734-IA4K, 1734-IM2, 1734-IM4 |
|---|---|
| Voltage, on-state nom (IA) | 120V AC |
| Voltage, on-state range (IA) | 65…132V AC |
| Voltage, on-state nom (IM) | 220V AC |
| Input filter time | 20 ms hardware + 1…65 ms digital filter (programmable in 1 ms increments) |
| Isolation voltage | 240V continuous; type tested at 3250V DC for 60 s |
Digital DC Input Modules
| Catalog numbers | 1734-IB2, 1734-IB4, 1734-IB4K, 1734-IB8, 1734-IB8K, 1734-IV2, 1734-IV4, 1734-IV8, 1734-IV8K, 1734-IB4D |
|---|---|
| Voltage, on-state nom | 24V DC |
| Voltage, on-state range | 10…28.8V DC |
| Voltage, off-state, max | 5V DC |
| Input filter time | 0.5 ms hardware + 0…65 ms selectable |
Digital DC Output Modules
| Catalog numbers | 1734-OB2, 1734-OB2E, 1734-OB2EP, 1734-OB4, 1734-OB4K, 1734-OB4E, 1734-OB8, 1734-OB8E, 1734-OB8K, 1734-OB8EK, 1734-OV2E, 1734-OV4E, 1734-OV8E, 1734-OV8EK |
|---|---|
| Voltage, on-state nom | 24V DC |
| Voltage, on-state range | 10…28.8V DC |
| Output current rating (OB2) | 1.0 A per channel, 2.0 A max per module |
| Output filter time | 0.1 ms Off-to-On and On-to-Off |
Analog Input Modules
| Catalog numbers | 1734-IE2C, 1734-IE2CK, 1734-IE2V, 1734-IE2VK, 1734-IE4C, 1734-IE4CK, 1734-IE8C, 1734-IE8CK |
|---|---|
| Input range (current) | 4…20 mA or 0…20 mA |
| Input range (voltage) | 0…10V or ±10V user configurable |
| Absolute accuracy | ±0.1% Full Scale @ 25 °C (77 °F) |
| Conversion type | Delta Sigma |
| Data format | Signed integer |
Analog Output Modules
| Catalog numbers | 1734-OE2C, 1734-OE2CK, 1734-OE2V, 1734-OE2VK, 1734-OE4C, 1734-OE4CK |
|---|---|
| Output range (current) | 4…20 mA or 0…20 mA |
| Output range (voltage) | 0…10V or ±10V user configurable |
| Absolute accuracy | ±0.1% Full Scale @ 25 °C (77 °F) |
| Resistive load on current output | 0…750 Ω |
POINT Guard Safety I/O Modules
| Safety digital input | 1734-IB8S, 1734-IB8SK – 8 inputs, current sinking, 11…28.8V DC |
|---|---|
| Safety analog input | 1734-IE4S, 1734-IE4SK – 4 single-ended; voltage, current, or tachometer |
| Safety digital output | 1734-OB8S, 1734-OB8SK, 1734-OBV2S, 1734-OBV2SK |
| Safety rating | SIL CL 3 (IEC 61508, IEC 62061); PLe/Cat. 4 (ISO 13849-1), certified by TÜV Rheinland |
| Input filter time (IB8S) | 0…126 ms in 6 ms increments |
Communication Protocols
Supported industrial networks and field buses for the products covered by this publication.
EtherNet/IP Supported via 1734-AENT, 1734-AENTK (single port) and 1734-AENTR, 1734-AENTRK (dual port with embedded switch). Supports direct, rack-optimized, and enhanced rack-optimized connections. Up to 63 I/O modules per node.
ControlNet Supported via 1734-ACNR, 1734-ACNRK. Deterministic and repeatable data delivery. Supports 25 direct connections and 5 rack connections. Up to 63 I/O modules per node. Requires Series C POINT I/O modules or later.
DeviceNet Supported via 1734-ADN, 1734-ADNK, 1734-ADNX, 1734-PDN, 1734-PDNK. Uses CIP for control, configuration, and data collection. Up to 63 I/O modules per node. 1734-ADNX provides an extended subnet connector.
PROFIBUS DP Supported via 1734-APB. Connects to existing PROFIBUS DP 5 m (16.4 ft) bus, 12 MB network. Up to 63 I/O modules per node.
OPC/DDE Listed as supported network connectivity for data monitoring.
Certifications & Compliance
c-UL-us: UL Listed Industrial Control Equipment, certified for US and Canada (UL File E65584); UL Listed Class I Division 2, Group A, B, C, D Hazardous Locations (UL File E194810)
UKCA and CE: EN 61326-1, EN 61000-6-2, EN 61000-6-4, EN 61131-2 (EMC Directive 2014/30/EU)
RoHS: UK SI 2012 No. 3032 and EU 2011/65/EU, compliant with EN IEC 63000
Ex (ATEX): EU 2014/34/EU, EN IEC 60079-0, EN IEC 60079-7; II 3G Ex ec IIC T4 Gc; DEMKO 04 ATEX 0330347X; UL 22 UKEX 2478X
IECEx: IEC 60079-0, IEC 60079-7; II 3G Ex ec IIC T4 Gc; IECEx UL 20.0072X
RCM: Australian Radiocommunications Act, AS/NZS CISPR 11
KC: Korean Registration of Broadcasting and Communications Equipment, Article 58-2 of Radio Waves Act, Clause 3
CCC: 2020122309111607; CNCA-C23-01; CNCA-C23-01 CCC Implementation Rule Explosion-Proof Electrical Products
ODVA: EtherNet/IP, DeviceNet, and ControlNet conformance tested per respective ODVA/ControlNet International specifications
TÜV Functional Safety (POINT Guard I/O): SIL CL 3 per IEC 61508 / IEC 62061; PLe/Cat. 4 per ISO 13849-1
CIP Safety: ODVA conformance tested to CIP Safety on DeviceNet specifications (POINT Guard I/O)
Document Contents
Full PDF covers the following topics in detail:
- POINT I/O Family Overview
- The POINT I/O System – components, module density, and system features
- Select a POINT I/O System – six-step selection process
- Select POINT I/O Communication – NetLinx architecture; EtherNet/IP, ControlNet, DeviceNet, and PROFIBUS DP network considerations and specifications
- Select POINT I/O Modules – Digital I/O (AC input/output, DC input/output, contact, relay, self-configurable)
- Select POINT I/O Modules – Analog I/O (current input/output, voltage input/output, temperature/RTD/thermocouple input)
- Select POINT I/O Modules – POINT Guard I/O safety modules (safety digital input/output, safety analog input)
- Select POINT I/O Modules – Specialty modules (ASCII/serial, SSI encoder, IO-Link master, high-speed counter, address reserve, common/voltage terminal)
- Select Terminal Bases – terminal base assembly and one-piece terminal bases; screw-clamp and spring-clamp options; wiring tables
- Select Power Components – communication adapter power, expansion power supplies, field power distributor
- Select POINT I/O Accessories – marker cards and POINTBus extension cables
- Mount a POINT I/O System – dimensions, weights, and mounting orientation
In-Stock Products Covered by This Document
Every product below is in stock at our Charlotte, NC warehouse and covered by this publication. Ships same-day (orders before 4 PM ET) with 2.5-year warranty included.
Frequently Asked Questions
How many I/O modules can be connected to a single POINT I/O communication adapter?
Each communication adapter supports a maximum of 63 I/O modules per node when expansion power supplies are used. Without expansion power, a single adapter directly supports 13 to 17 I/O modules with a maximum of 10 A field power.
What network protocols does the POINT I/O system support?
POINT I/O supports EtherNet/IP (via 1734-AENT/AENTR adapters), ControlNet (via 1734-ACNR), DeviceNet (via 1734-ADN, 1734-ADNX, 1734-PDN), PROFIBUS DP (via 1734-APB), and OPC/DDE data monitoring. All three NetLinx networks use the Common Industrial Protocol (CIP).
What is the maximum number of points per POINT I/O module?
POINT I/O modules offer 1 to 8 points per module, providing granularity to reduce system cost and size.
Do POINT I/O safety modules support SIL 3 applications?
Yes. POINT Guard I/O modules are certified by TÜV Rheinland as capable of SIL CL 3 per IEC 61508 and IEC 62061, and PLe/Category 4 per ISO 13849-1. They are used in GuardLogix, Compact GuardLogix, or SmartGuard systems.
Can POINT I/O modules be removed and inserted while the system is powered?
Yes. POINT I/O modules support Removal and Insertion Under Power (RIUP), and the system follows a No Tools design approach for assembly of the terminal base, RTB, and I/O module.
What is the absolute accuracy of the POINT I/O analog modules?
Analog input and output modules share a high accuracy rating of ±0.1% of full-scale accuracy at 25 °C (77 °F). This includes offset, gain, non-linearity, and repeatability error terms.
Can POINT I/O modules be mounted vertically without derating?
Yes. POINT I/O modules support both horizontal and vertical mounting without thermal derating, as stated in the module features table.
Disclaimer
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