MicroLogix 1200 Controllers and 1762 Expansion I/O — User Manual (1762-UM001)

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Specifications

Controller — General

Dimensions (24-point)	90 × 110 × 87 mm (3.54 × 4.33 × 3.42 in.), 104 mm wide with DIN latch open
Dimensions (40-point)	90 × 160 × 87 mm (3.54 × 6.30 × 3.42 in.), 104 mm wide with DIN latch open
Shipping weight	0.9 kg (2.0 lb) 24-point; 1.1 kg (2.4 lb) 40-point
Input power — AC models (AWA/BWA/AWAR/BWAR)	100…240V AC (-15%, +10%) @ 47…63 Hz
Input power — DC models (BXB/BXBR)	24V DC (-15%, +10%), Class 2 SELV
Power consumption	24-point: 68 VA / 70 VA / 27 W; 40-point: 80 VA / 82 VA / 40 W (model-dependent)
AC inrush current	120V AC: 25 A for 8 ms; 240V AC: 40 A for 4 ms
DC inrush current	24-point BXB: 15 A for 20 ms; 40-point BXB: 15 A for 30 ms
Sensor power (BWA/BWAR)	250 mA / 400 mA @ 24V DC, 500 mV pk-pk ripple, 400 µF max
Terminal screw torque	0.791 N·m (7.0 lb·in)
Removable terminal block	40-point controllers only (24-point has fixed terminals)
Programmer/HMI port	Equipped on 1762-LxxxxxR controllers only (DF1 Full-Duplex; responder only)

Controller — I/O & Electrical

Input circuit type	120V AC (AWA/AWAR) or 24V DC sink/source (BWA/BXB/BWAR/BXBR)
Output circuit type	Relay (AWA/BWA); Relay + FET (BXB with 1 high-speed 24V DC FET on 24-point, 1 high-speed + 4 FET on 40-point)
Fast DC input voltage range	14…24V DC (+10% @ 55 °C, +25% @ 30 °C) on Inputs 0…3
Normal DC input voltage range	10…24V DC (+10% @ 55 °C, +25% @ 30 °C) on Inputs 4 and higher
Relay output — continuous current per group common	8 A (2.5 A per point; 7.5 A on BXB/BXBR)
Relay output — current per controller	30 A @ 150V max / 20 A @ 240V max, or sum of per-point loads — whichever is less
Relay life	Mechanical 20,000,000 cycles; electrical per Relay Life Chart
Relay contact ratings	240V AC: 7.5 A make / 0.75 A break; 120V AC: 15 A make / 1.5 A break; 1800 VA make / 180 VA break
BXB FET output — general operation	24V DC (-15%, +10%); 1.5 A/point @ 30 °C derated to 1.0 A @ 55 °C; 8 A total @ 30 °C
BXB FET output — high-speed (Output 2)	100 mA load, 6 µs turn-on / 18 µs turn-off, 4 µs PTO/PWM output

Expansion I/O — Digital Modules

1762-IA8	8-point 120V AC input, 79…132V AC @ 47…63 Hz, 12 kΩ @ 50 Hz, Type 1+
1762-IQ8 / IQ16	8 / 16-point 24V DC sink/source input, 10…30V DC @ 30 °C, 3 kΩ, Type 1+
1762-IQ32T	32-point 24V DC sink/source input, 4 isolated groups of 8, 4.7 kΩ, Type 1
1762-OA8	8-point 120/240V AC Triac output, 85…265V AC @ 47…63 Hz, 10 mA on-state min
1762-OB8 / OB16 / OB32T	8 / 16 / 32-point 24V DC sourcing output, 20.4…26.4V DC, 1.0 A/point max
1762-OV32T	32-point 24V DC sinking output, 10.2…26.4V DC, 0.5 A/point @ 60 °C
1762-OW8 / OW16	8 / 16-point AC/DC normally-open relay output, 5…265V AC / 5…125V DC, 2.5 A/point
1762-OX6I	6-point AC/DC Type C (isolated SPDT) relay output, 5…265V AC / 5…125V DC, 7 A/point
1762-IQ8OW6	Combo 8-point 24V DC input + 6-point AC/DC relay output
Digital module dimensions	90 × 87 × 40.4 mm (3.54 × 3.43 × 1.59 in.); 110 mm (4.33 in.) tall with mounting tabs

Expansion I/O — Analog Modules

1762-IF4	4-channel voltage/current analog input, -10…+10V DC or 0…10V DC or 4…20 mA, 15-bit bipolar
1762-OF4	4-channel voltage/current analog output, 0…10V DC or 4…20 mA, 12-bit unipolar
1762-IF2OF2	Combo 2-channel input + 2-channel output voltage/current analog, 12-bit unipolar
1762-IR4	4-channel RTD/resistance input (Pt, Cu, Ni, NiFe + 150 / 500 Ω), ±0.2 °C repeatability
1762-IT4	4-channel thermocouple / mV input (B, C, E, J, K, N, R, S, T), 15-bit plus sign
Analog module dimensions	90 × 87 × 40 mm (3.54 × 3.43 × 1.58 in.); 110 mm (4.33 in.) tall with mounting tabs
Analog bus current	40 mA @ 5V DC + 50…165 mA @ 24V DC (module-dependent)
Analog isolation	30V AC/30V DC rated working voltage; 500V AC / 707V DC dielectric for 1 min

Environmental (Controllers + Expansion I/O)

Operating temperature (controllers)	0…+55 °C (+32…+131 °F) ambient
Operating temperature (1762 digital modules)	-20…+65 °C (-4…+149 °F), IEC 60068-2-1/2/14
Operating humidity	5…95% relative, non-condensing
Vibration	10…500 Hz, 5 g, 0.030 in. max peak-to-peak (1.5 g on relay operation)
Shock (operating)	30 g; 7 g on relay operation
Shock (non-operating)	50 g panel-mounted / 40 g DIN-rail
ESD immunity	4 kV contact / 8 kV air (IEC 61000-4-2)
Radiated RF immunity	10 V/m, 80…1000 MHz, 80% AM + 900 MHz keyed (IEC 61000-4-3)
Enclosure type rating	None (open-style; DIN rail or panel mount)

Catalog Number Format

How to read an Allen-Bradley 1762 catalog number. Each position encodes a specific configuration attribute.

Position

Meaning

Example

1762

Bulletin prefix for MicroLogix 1200 controllers and 1762 expansion I/O modules

1762-L40BWA → Bulletin 1762

-L24 / -L40

Controller class by I/O count — L24 = 14 in / 10 out; L40 = 24 in / 16 out

-L24BWA or -L40BWA

A / B (1st letter)

Input type — A = 120V AC, B = 24V DC

L24AWA = AC inputs; L24BWA = DC inputs

W / X

Output type — W = relay, X = relay + FET (adds high-speed outputs and PTO/PWM)

L24BWA = relay; L24BXB = relay + 1 high-speed FET

A / B (2nd letter)

Input power — A = 120/240V AC, B = 24V DC

L24BWA = AC-powered; L24BXB = DC-powered

R suffix

Adds a Programmer/HMI (DF1 Full-Duplex responder) port and removable terminal blocks on 40-point

L24BWAR = BWA controller + HMI port

Expansion -I / -O / -OW / -OX

1762 module class — I=Input, O=sourcing Output, OW=relay Output, OX=isolated relay, IF/OF=analog, IR=RTD, IT=thermocouple

1762-IQ16 = 16-point input; 1762-OW16 = 16-point relay; 1762-IF4 = 4-ch analog in

Channel count + voltage / type

Suffix digits encode point count and voltage/mode (e.g. 8/16/32 points; A=AC, Q=DC sink/source)

IA8 = 8-pt AC input; IQ32T = 32-pt DC input; OB32T = 32-pt DC source output

Communication Protocols

Supported industrial networks and field buses for the products covered by this publication.

DF1 Full-Duplex (Channel 0) Point-to-point programming and HMI; default mode DF1 Half-Duplex master / slave (Channel 0) Multi-drop RS-232 network; Series B firmware or later DH-485 (Channel 0) RS-485 via 1761-NET-AIC Advanced Interface Converter Modbus RTU master / slave (Channel 0) RS-232 or RS-485 via 1761-NET-AIC; Series B firmware ASCII (Channel 0) For barcode readers, weigh scales, serial printers — requires RSLogix 500 v4.50+ EtherNet/IP (via 1761-NET-ENI gateway) External module; controller itself has no on-board Ethernet Programmer/HMI port (R-suffix controllers) DF1 Full-Duplex responder only — fixed parameters, cannot initiate messages

Certifications & Compliance

c-UL-us Listed Industrial Control Equipment (UL File E322657) c-UL-us Listed Class I Division 2 Groups A,B,C,D Hazardous Locations (UL File E334470) CE — EN 61326-1 EMC, EN 61000-6-2 Industrial Immunity, EN 61000-6-4 Industrial Emissions, EN 61131-2 Clauses 8/11 (Zone A & B) CE LVD — EN 61131-2 Clause 11 CE RoHS — EN IEC 63000 UKCA — 2016 No. 1091 EMC, 2016 No. 1101 LVD, 2012 No. 3032 RoHS RCM (Australia / New Zealand) — AS/NZS CISPR 11, EN 61000-6-4 KC (South Korea) — Radio Waves Act Article 58-2 Clause 3

Document Contents

Full PDF covers the following topics in detail:

Catalog number breakdown for 1762-L24 and 1762-L40 MicroLogix 1200 controllers
Hardware features — trimpots, comm toggle push button, status LEDs, memory/RTC slot
Installation — DIN rail, panel mount, expansion I/O connection, and spacing rules
Wiring diagrams — sinking/sourcing variants for every 1762-L24 and L40 model
Communication connections — RS-232, DH-485 (via AIC+), Modbus, DF1 half-duplex
Trimpot operation and memory module (1762-MM1) / real-time clock (1762-RTC)
Controller specifications: dimensions, input/output ratings, analog filter settings
1762 expansion I/O specs — digital, analog, RTD, and thermocouple modules
Relay contact ratings and relay life charts
Agency certifications: c-UL-us, CE, UKCA, RCM, KC, Class I Div 2

Frequently Asked Questions

Which 1762 expansion modules work on a MicroLogix 1400?

All of them. Bulletin 1762 expansion modules are the shared I/O family for both MicroLogix 1200 and MicroLogix 1400 controllers — the connector, backplane protocol, and power budget are compatible. The 1200 supports up to 6 modules; the 1400 supports up to 7. Check system loading (sum of 5V and 24V bus current plus heat dissipation) before finalizing the stack.

What's the difference between a 1762-IQ16 and a 1762-IQ32T?

Both are 24V DC sink/source input modules. The IQ16 is 16 points, Type 1+, 10…30V DC operating (derates to 26.4V at 55 °C), bus draw 70 mA at 5V DC, in two isolated groups of 8. The IQ32T is 32 points, Type 1 (no "+"), derates to 23 points above 60 °C ambient to keep thermal load in spec, bus draw 170 mA at 5V DC, in four isolated groups of 8. Use IQ32T for dense input panels, IQ16 when per-point diagnostics or cost-per-point matters more than density.

Do I need relay outputs or FET outputs on my MicroLogix 1200?

Relay (OW / L24…WA / L40…WA) is the default for universal AC/DC loads, lamps, contactors, and anything with high inrush — rated 2.5 A per point, 20M mechanical cycles, 5…265V AC / 5…125V DC. Go FET (L24BXB / L40BXB or 1762-OB8/OB16/OB32T) when you need fast switching (PWM / PTO, high-speed outputs), DC-only loads, and no contact wear. BXB controllers give you one (24-point) or five (40-point) FET outputs alongside relay outputs on the same unit.

How do I add Ethernet to a MicroLogix 1200?

The 1200 itself has no on-board Ethernet. Use a 1761-NET-ENI (or NET-ENIW with email/SMTP) bridge on the RS-232 port — it presents the controller as an EtherNet/IP endpoint for RSLogix 500 programming, HMI access, and MSG instructions. If Ethernet is a hard requirement on a new install, consider the MicroLogix 1400 (1766-L32) instead — it has a 10/100 Ethernet port built in.

What does the 'R' suffix (e.g., 1762-L40BWAR) add?

Two things: (1) removable terminal blocks on 40-point controllers (24-point R models keep fixed terminals but add the port), and (2) a second communication port called the Programmer/HMI Port. The HMI port is DF1 Full-Duplex responder only — it answers messages but cannot initiate them, and its parameters (baud, node, framing) are fixed. It's intended for a permanently-mounted HMI while the main Channel 0 stays free for programming.

Which temperature module should I pick — IR4 or IT4?

1762-IR4 is a 4-channel RTD / resistance input — supports Pt 385/3916, Cu, Ni, NiFe, plus 150 Ω and 500 Ω resistance inputs. Use it when you have 2/3/4-wire RTDs. Repeatability is ±0.1 °C (Ni/NiFe) to ±0.2 °C (other RTD types). 1762-IT4 is a 4-channel thermocouple/mV input — supports types B, C, E, J, K, N, R, S, T plus ±50 mV and ±100 mV ranges, with built-in cold-junction compensation. Use it for thermocouples. Shielded cable (e.g., Belden 8761) is required on both.

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MicroLogix 1200 Controllers and 1762 Expansion I/O — User Manual