1769-CRR1 New In Box 1769CRR1 Right To Right Cable Surplus
PRODUCT DETAILS
1769-CRR1 — Compact I/O Remote I/O Link Adapter (Remote End)
The 1769-CRR1 is the remote-end adapter module for the 1769 Compact I/O CRL link system. It pairs with a 1769-CRL1 master module installed in the controller's local I/O bus, connecting via a dedicated serial cable to bring a remote bank of 1769 I/O modules into the controller's I/O tree as if they were local. The CRR1 sits at the head of the remote I/O bank — I/O modules installed to its right on the same DIN rail become accessible to the controller through this link.
Specifications
| Parameter | Value |
|---|---|
| Part Number | 1769-CRR1 |
| Platform | Compact I/O (1769) |
| Function | Remote I/O link adapter (remote end) |
| Pairs With | 1769-CRL1 (master, installed at controller's local bus) |
| Max Remote I/O Modules | Up to 16 in the remote bank |
| Max Cable Length | 30 m (CRL cable to master) |
| I/O Update | Synchronous with controller scan cycle |
| Field Power | 24V DC (local supply at remote bank, not via CRL cable) |
| Backplane Current (5V) | 60 mA |
| Operating Temperature | 0°C to 60°C |
| Standards | UL 508, CE |
What the Remote Adapter Does
The CRR1 receives the CRL communication signal from the master module and translates it into local backplane data for the I/O modules in its bank. From the controller's program, the remote modules appear as standard local I/O — same tag structure, same addressing conventions, no special instructions needed to read or write their data. The CRR1 handles the protocol translation transparently; the application program doesn't need to know the I/O is physically remote.
This architecture suits installations where a small I/O bank needs to sit away from the main controller — a junction box partway along a machine, a remote enclosure near a specific process area — without the cost or complexity of an EtherNet/IP network segment. The 30 m cable limit and 16-module capacity define the scope: beyond that distance or module count, an EtherNet/IP-based remote I/O architecture is the more appropriate choice.
Installation and Wiring
- Use only the specified CRL cable between the CRR1 and the master 1769-CRL1 — standard Ethernet or generic serial cable is not electrically compatible with the CRL link's signaling.
- The remote I/O bank requires its own 24V DC field power supply, local to the remote bank. The CRL cable carries only communication signals, not power for the I/O modules.
- A 1769-ECR end cap is required at the rightmost module of the remote bank, the same as any standalone 1769 I/O system.
- Ground the CRL cable shield at one end only to avoid a shield ground loop.
- Configure the remote bank's modules in Studio 5000 under the corresponding 1769-CRL1 node — module types and slot order in the software must match the physical installation exactly.
FAQ
Q: Can the 1769-CRR1 be used without a matching 1769-CRL1 master?
No. The CRR1 only functions as the remote half of a CRL link pair. It requires a 1769-CRL1 installed in the controller's local I/O bus to establish the link.
Q: Does the remote I/O bank need a separate controller or processor?
No. The CRR1 is a communication adapter, not a controller. All program logic runs in the main controller at the master end — the remote bank simply extends that controller's I/O reach.
Q: What happens if the CRL cable is disconnected while the system is running?
The controller detects the loss of remote I/O communication and faults the affected I/O modules in the remote bank. Local I/O at the controller's main bus continues operating normally — only the remote bank's data becomes unavailable until the link is restored.
Q: Can analog modules be included in the remote I/O bank with the CRR1?
Yes. The remote bank can contain any mix of standard 1769 I/O modules — digital, analog, and specialty types — all updating at the same scan-synchronous rate through the CRL link.