Product Core Brief
- Part Number: 8707-CA-08
- Brand: GE (now Emerson)
- Series: GE PAC8000 I/O
- Core Function: 8-slot PAC8000 I/O carrier that provides the mechanical and electrical backbone for Bus Interface Modules, power supplies, I/O modules and field terminals.
- Product Type: PAC8000 8-Slot I/O Carrier
- Key Specs: 8 I/O module slots | Railbus backplane | supports BIM, power supply and I/O modules | keyed snap-on field terminals | DIN-rail / panel-mount | field-installable architecture
- Condition: New Original / New Surplus
Product Introduction
GE 8707-CA-08 is an 8-slot I/O carrier for the GE PAC8000 distributed I/O system. It serves as the mounting and interconnection platform for Bus Interface Modules, power supplies, I/O modules and field terminals, forming a complete local I/O node.
The carrier provides the internal Railbus backplane that carries address, data and power lines between installed modules. It supports flat-panel or T-/G-type DIN-rail mounting, and field terminals snap onto the carrier to accept field wiring without additional connectors. Mechanical keying helps prevent incorrect terminal pairing, and modules can be replaced without disturbing the backplane wiring.
The 8707-CA-08 itself is a carrier assembly rather than a standalone controller or I/O module. Its final function depends on the installed BIM, power supply and I/O modules. PAC8000 I/O is designed for process automation and field-mounted applications, with support for harsh environments and hazardous-area installations depending on the selected modules and system configuration.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | GE (now Emerson) |
| Part Number | 8707-CA-08 |
| Product Type | PAC8000 8-Slot I/O Carrier |
| Series | GE PAC8000 I/O |
| Typical Application | Distributed I/O node backbone for PAC8000 systems |
| Module Capacity | 8 I/O module slots |
| Internal Bus | Railbus backplane |
| Supported Modules | BIM, power supply, I/O modules, field terminals |
| Mounting | Flat panel or T-/G-type DIN rail |
| Status | Legacy / Obsolete |
Note: Exact environmental rating, hazardous-area approval, power distribution limits, BIM compatibility and supported I/O module types should be confirmed against the carrier label, installed modules and the PAC8000 system manual before commissioning.
Quality Control Process (DYNAMIC GENERATION)
- Visual and mechanical inspection. We check the carrier housing, Railbus connectors, DIN-rail/panel-mount hardware, and field-terminal mounting points for damage or corrosion.
- Backplane continuity check. Key Railbus pins and module slots are verified for correct continuity and no short circuits.
- Configuration verification. The installed BIM, power supply and I/O modules are matched against the original node configuration.
- Power-up and communication check. Where a compatible test setup is available, the assembled node is checked for proper power-up, BIM initialization and I/O communication.
- Final packaging. After passing inspection, the unit is anti-static bagged and foam-packed for shipment.
Replacement Pitfall Guide (DYNAMIC GENERATION)
❗ This is a carrier, not a standalone module. The 8707-CA-08 must be equipped with the correct BIM, power supply and I/O modules to function.
❗ Verify slot count. The “08” suffix typically indicates an 8-slot carrier; do not substitute it for a 4-slot or multi-BIM carrier without confirming mechanical and electrical compatibility.
❗ Confirm BIM compatibility. PAC8000 nodes require the correct Bus Interface Module for the host network; the carrier alone does not determine protocol.
❗ Check field terminal keying. PAC8000 field terminals are mechanically keyed; using the wrong terminal type can cause wiring errors or unsafe conditions.
❗ Do not mix with PACSystems RX3i hardware. PAC8000 carriers, BIMs and I/O modules are not interchangeable with RX3i rack-based modules.
❗ Handle as ESD-sensitive equipment. Always use anti-static handling procedures during removal, installation, and storage.
Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
| Original Model | Replacement / Successor Model | Compatibility Level | Migration Notes |
|---|---|---|---|
| GE 8707-CA-08 | GE 8707-CA-08 | Direct | Same 8-slot carrier; verify installed BIM, power supply and I/O modules. |
| GE 8707-CA-08 | GE 8701-CA-BI | Needs Adaptation | Multi-BIM carrier variant; slot layout and module arrangement may differ. |
| GE 8707-CA-08 | Other PAC8000 carriers | Needs Adaptation | Slot count, mounting and module layout must match the original node. |
| GE 8707-CA-08 | PACSystems RX3i modules | Not Compatible | Different platform, backplane and mounting architecture. |
Benchmark highlights
- 8-slot PAC8000 I/O carrier for distributed I/O nodes.
- Provides Railbus backplane for BIM, power supply and I/O modules.
- Supports keyed snap-on field terminals for fast replacement.
- Suitable for process control, field-mounted I/O and hazardous-area PAC8000 applications.
- Legacy product; best suited for existing system maintenance and like-for-like replacement.
