RJ12 6P6C Male to 2-Pin Screw Terminal Block RS485 Adapter
PCM-0999 is a compact RJ12 6P6C male to 2-pin terminal block adapter designed to provide a convenient connection between equipment using a compatible RJ12 interface and two-wire terminal-based wiring. The adapter is suitable for RS485 and other equipment-specific communication applications where the required signals are assigned to RJ12 pins 3 and 4.
RJ12 6P6C to 2-Wire Terminal Connection
PCM-0999 combines a modular 6P6C male plug with a two-position terminal block, providing a simple way to connect compatible RJ12-equipped devices to external two-wire cabling.
Unlike a full 6-pin RJ12 breakout adapter, this product uses only two conductors. RJ12 pin 3 is routed to terminal position 1, while pin 4 is routed to terminal position 2.
Compact RS485 Wiring Adapter
For equipment using a compatible RS485 pin assignment, PCM-0999 can provide a direct interface between the RJ12 modular connector and field wiring terminated at a two-pin terminal block.
The internal conductors use UL1061 26AWG red and black wire, while the orange PVC overmold forms a compact integrated housing around the connection.
Key Features
Uses a 6P6C modular male plug for compatible communication and control equipment.
Provides a two-position terminal interface for external field wiring.
RJ12 pin 3 connects to terminal 1 and pin 4 connects to terminal 2.
Orange PVC overmolding creates a compact integrated adapter body.
Product Specifications
| Part Number | PCM-0999 |
| Product Type | RJ12 / 6P6C Terminal Block Adapter |
| Connector A | 6P6C Male Plug |
| Connector B | 2-Pin Terminal Block |
| Connected RJ12 Pins | Pin 3 and Pin 4 |
| Pin Assignment | Pin 3 → Terminal 1 / Pin 4 → Terminal 2 |
| Internal Wire | UL1061 26AWG |
| Wire Colors | Red / Black |
| Overmold | Orange PVC 45P |
| Compliance | RoHS |
RJ12 6P6C Pinout and Terminal Wiring
PCM-0999 is not a full six-position breakout adapter. Only two contacts of the 6P6C plug are internally connected to the terminal block.
| RJ12 / 6P6C Pin | Terminal Position | Internal Wire |
|---|---|---|
| Pin 3 | Terminal 1 | Red |
| Pin 4 | Terminal 2 | Black |
Compatibility note: RJ12 and 6P6C describe the physical modular connector format, but equipment manufacturers may use different pin assignments. Confirm that the connected device uses pins 3 and 4 for the required signals before using this adapter.
RJ12 to RS485 Terminal Wiring Applications
In equipment where the RS485 communication pair is assigned to the corresponding RJ12 pins, PCM-0999 provides a convenient way to transition from the modular plug interface to a two-wire terminal connection.
This can simplify wiring during installation, equipment integration, bench testing, troubleshooting or connection to terminal-based communication wiring.
Important: PCM-0999 is a wiring adapter, not an RS485 protocol converter. It does not perform electrical protocol conversion, isolation, signal conditioning or active communication processing.
Typical Applications
RS485 Communication Equipment
Suitable for compatible devices that route a two-wire RS485 communication pair through the required RJ12 contacts.
Industrial Controllers
Provides a modular-plug-to-terminal interface for compatible industrial control and communication equipment.
Testing & Integration
Useful for prototype systems, bench testing, troubleshooting and equipment integration requiring access to a two-wire connection.
RJ12 Screw Terminal and Breakout Adapter Applications
Depending on the terminology used in an equipment project, this type of interface may also be searched as an RJ12 terminal block adapter, RJ12 screw terminal adapter, 6P6C terminal adapter, RJ12 breakout adapter or RJ12 two-wire adapter.
PCM-0999 is specifically a two-wire version rather than a full six-pin breakout, so the actual connected pin assignment should always be checked against the equipment wiring diagram.
Technical Drawing
PCM-0999 dimensions, terminal layout and RJ12 pin assignment reference.
Custom RJ11, RJ12 and Terminal Block Adapters
Different devices may use different modular connector pinouts, terminal arrangements or wiring requirements. Premier Cable can support custom modular plug and terminal block adapters according to equipment-specific connection requirements.
RJ11, RJ12, 6P4C, 6P6C and application-specific modular connector configurations can be reviewed.
Internal wiring can be produced according to the required equipment pinout instead of using a universal pin assignment.
Different terminal block positions, connector arrangements, overmolding and labeling can be discussed for custom projects.
Need a Custom RJ12 to Terminal Block Adapter?
Send us the equipment model, modular connector type, required pin assignment, terminal configuration and quantity. Premier Cable can support RJ11, RJ12, 6P6C, RS485 and custom terminal block adapter assemblies for equipment-specific applications.
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