4.4.2 Wiring Port S1 for RS-485—Two-Wire
For connecting the Liebert SiteLink-E Port S1 to a BMS that uses two-wire RS-485:
• Liebert recommends using shielded, 18-24AWG twisted pair wiring.
• The distance from the Liebert SiteLink-E module to the first RS-485 device depends on the
communications baud rate. This distance seldom should exceed 3,000 ft. (914.4m) at 9600
baud.
1. Be sure that power to the Liebert SiteLink-E is Off before beginning to connect wiring.
2. Check the communication wiring for shorts and grounds.
3. Wire the Liebert SiteLink-E to the third-party device, using the labels near Port S1 as a guide
(see Figure 4.5 on the next page for details).
4. Set the RS-232 or RS-485 jumper to RS-485.
5. Set the MS/TP on S1 DIP switch to Enable (On).
6. Set the PTP on S1 DIP switch to Disable (Off).
Vertiv | Liebert® SiteLink-E™ Installation Manual | 17
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