teko ASTRA ZITADEL, Quick Start Manual

Page: 10 / 94

10
Relay External circuit control relay output with galvanic isolation from the
component network (
«dry contact»). Indifferent to direction of controlled
current flow or polarity of the controlled voltage
OC Open C
ollector output galvanically linked to the component’s common
wire. Ensures control of
«inflowing» current
(F)VA (Fire) Voice Alerting
PCB Printed Circuit Board
BAT Battery
ShC Short Circuit
CC Circuit Cut (Open Circuit)
DB Database
HDD Hard Disk Drive (commonly called
“hard drive”)
DIC Design and Installation Company
TM Technical Maintenance
CSP Central Surveillance Post