What is the maximum device capacity of the MS-9600 per SLC loop, and how do I add a second loop?

Each Signaling Line Circuit (SLC) loop supports a maximum of 318 addressable devices, consisting of 159 detectors and 159 modules (Page 1) [1].

To add a second loop, you must install an optional SLC-2LS (for LS/UDLS models) or SLC-2 (for standard models) expander module, which increases total capacity to 636 devices (Page 41) [1].

1. Disconnect all AC and DC power from the FACP (Page 41) [1].

2. Install the four supplied metal standoffs into the motherboard at the designated locations (Page 41) [1].

3. Carefully plug the expander module's J3 connector into the J3 connector on the main circuit board (Page 42) [1].

4. Secure the module to the standoffs using the provided screws (Page 42) [1].

5. Connect the second SLC loop wiring to terminal block TB8 on the expander module (Page 42) [1].

6. Restore power and program the new addressable devices (Page 42) [1].