Honeywell DCP552 Mark II - Manual (Page 45)

4-17
■ Connection to ST221
Handling Precautions
• Attach 1/2W or greater terminating resistances of 150Ω ±5% at each
end of the communications lines.
• The DCP552 operates as a master station when connected to an ST221
during communications.
Chapter 4. WIRING
60 61 62 63 64
SG
3 4 1 2 5
ST221DE05DCP
SDA SDB RDA RDB