Overview
The Allen-Bradley 1336-GM1 is a specialized Remote I/O communications board for legacy 1336 drive systems. This module provides a critical interface between programmable controllers and SCANport devices, enabling reliable remote I/O communication across distributed automation networks. Designed for industrial motion control and drive-based systems, the 1336-GM1 has been discontinued by the manufacturer but remains essential for maintaining existing installations.
Key Features
- Direct SCANport Integration: Mounts directly onto compatible SCANport products with an internal SCANport connector
- Drive-Powered Design: Derives all operating power from the host 1336 drive—no external power supply required
- Remote I/O Connectivity: Dedicated Remote I/O connector for standard cable connections to remote peripherals and I/O devices
- DIP Switch Configuration: User-configurable operations via on-board DIP switches for baud rate, termination, and communication protocol settings
- LED Status Indicators: Built-in LEDs report module health, link status, and SCANport device connectivity in real time
- Datalink Support: Compatible with SCANport datalink messaging for efficient controller-to-device information transfer
Technical Specifications
| Part Number | 1336-GM1 |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Product Type | Remote I/O Communications Board |
| Input Power | Drive-Supplied (no external power) |
| Internal Connector | SCANport connector (PCB-mounted) |
| External Connector | Remote I/O cable connector |
| Configuration Method | DIP switches with factory defaults available |
| Status Indicators | LED indicators for link, module, and SCANport health |
| Communication Protocol | Remote I/O / SCANport; supports datalinks and block transfers |
| Weight | 0.15 lbs (68 g) |
| Mounting Style | Plugs directly onto SCANport-enabled drives |
| ESD Sensitivity | Yes—use static precautions during installation |
| Status | Discontinued by manufacturer; surplus/refurbished available |
Typical Applications
- Connecting 1336-series AC drives to remote I/O networks in manufacturing plants
- Distributed motor control systems requiring SCANport communications
- Legacy automation networks using Remote I/O cable topology for field devices
- Multi-drive synchronization and coordinated motion control systems
- Industrial equipment retrofits where DH+ or Remote I/O networks are already in place
- Maintenance and emergency replacement in existing 1336 IMPACT, PLUS, PLUS II, and FORCE drive installations
Compatibility & Replacements
The 1336-GM1 is compatible with the following 1336-series drives:
- 1336 IMPACT Drives
- 1336 PLUS AC Drives
- 1336 PLUS II Drives
- 1336 FORCE Drives
This module requires internal SCANport connectors and standard Remote I/O cables for full functionality. When replacing or upgrading, consult the product manual for DIP switch configuration and ensure compatibility with your drive firmware version. The 1336-GM1 has no direct plug-compatible replacement from Rockwell Automation; modern alternatives utilize Ethernet communications (CompactLogix, ControlLogix with EN2T modules) but require full system re-architecture.
