| Station Setup |
| 2300 Connect via 2100-IS |
The 2100-IS is an isolated to RS485 converter, with comms timeout relay.

2100-IS to 2300-XX connections (See 2300-XX Manual for complete wiring diagram)
| 2100-IS Terminal | 2300-XX Terminal |
| 70 | 70 |
| 71 | 71 |
Fit a 1K terminating resistor at the end of the data loop.
2100-IS Dip Switch Settings for RS485 operation - Dip Switch S2
| Switch | State |
| 1 | ON |
| 2 | ON |
| 3 | ON |
| 4 | ON |
| 5 | OFF |
| 6 | As Required for Alarm Delay |
| 7 | OFF * |
| 8 | OFF |
*Set switch 7 ON for improved TXE turn off performance IF Comms Delay in 2300-XX stations has been cleared from the default value of 20 mSec.