Product Description
Allen-Bradley 1771-A1B I/O Chassis
The Allen-Bradley 1771-A1B is a panel-mounted I/O chassis designed to house PLC-5 I/O modules. It provides a reliable backplane for communication and power distribution between modules in Allen-Bradley 1771 series control systems.
Technical Specifications
Mechanical & Electrical Characteristics
| Attribute |
Specification |
| Mounting Type |
Panel |
| Dimensions (W x H x D) |
229 x 315 x 193 mm (9.0 x 12.4 x 7.6 inches) |
| Weight (without modules) |
3.6 kg (8 lbs) |
| I/O Module Slots |
4 |
| Maximum Backplane Current @ 5V DC |
16A |
| Compatible Replacement for Chassis Series |
A (1771-A1B) |
| Supersedes |
1771-A1 |
Environmental Specifications
| Attribute |
Specification |
| Operating Temperature |
0 to 60°C (32 to 140°F) |
| Storage Temperature |
-40 to 85°C (-40 to 185°F) |
| Relative Humidity |
5 to 95% (non-condensing) |
| Shock (Operating/Non-operating) |
IEC 60068-2-27 (15930g) |
| Vibration |
IEC 60068-2-6 (2g @ 10-500Hz) |
| Enclosure Type |
Open-style |
Electromagnetic Compatibility (EMC) & Immunity
| Standard |
Specification |
| Emissions |
CISPR 11 Group 1, Class A |
| ESD Immunity |
IEC 61000-4-2 (4 kV Indirect Discharges) |
| Radiated RF Immunity |
IEC 61000-4-3 (10 V/m with 1 kHz sine-wave 80% AM from 30 MHz to 1000 MHz) |
Certifications & Compliance
-
UL Listed (Industrial Control Equipment)
-
CSA Certified (Process Control Equipment for Class I, Division 2, Groups A, B, C, D Hazardous Locations)
-
European Union Compliance:
-
EMC Directive 89/336/EEC (EN 50081-2 Industrial Emissions, EN 50082-2 Industrial Immunity)
-
LVD Directive 73/23/EEC (EN 61131-2 Programmable Controllers)
-
C-Tick (Australia/NZ Compliance) – AS/NZS 2064 (Industrial Emissions)
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