Description
BT 777-0 — Interface Module
Siemens · BT 777-0 · 6ES5777-0BC01
Description
SIMATIC S5 BT 777-0 bus terminal for the SINEC L1 local area network, converting the 20 mA current-loop signal from the CP 530 serial interface to a SINEC L1 RS-485 bus signal. Provides node connection with optical isolation and break recognition, supporting bus segments up to 2.5 km.
Key specifications
Parameter | Value |
Function | SINEC L1 bus terminal (20mA current loop to RS-485 converter) |
Max segment length | 2.5 km (up to 4 km with optically isolated -1BC00 variant) |
Max nodes | 31 including master |
Interface | 5-way SIGUT screw terminals, 15-way Cannon connector cable to node |
Power | External +5V (0.3A) optional backup supply |
Reference
Field | Value |
Manufacturer (OEM) | Siemens |
Model | BT 777-0 |
Part number | 6ES5777-0BC01 |
Category | Communication Processor |
System family | SIMATIC NET / SINEC |
Stores quantity | 41 |
Data confidence | high |
Manuals filed (007 - Manuals)
- hb89e_cp143_00-07.pdf — CP143 SINEC H1 communication processor manual (English)
- Manual CP1430 English Vol1.pdf — SINEC CP1430/CP143x communication processor manual Vol 1
- SINEC_CP1430TF_Vol.1_e.pdf — SINEC CP1430 TF communication processor manual (English)
Notes
Confirmed via SINEC L1/CP530 manual (Scribd) and automation-base.com listing for BT 777-0 bus terminal family; exact -0BC01 variant matches break-recognition described type.
Source: Spare Parts List for Sales V7 (Bohemia Market / BM Global stores inventory). Filed in the AI HW Knowledge Base.