Esse-ti ST56 INTL, Quick Manual

Page: 3 / 24

Page 3 DESCRIPTION
Terminal blocks
BATT 12 Vdc power supply input
AR Received alarm indicator light
AI Given alarm indicator light
+12 Output 12 Vdc (max. 100 mA)
AL1 Alarm input 1
AL2 Alarm input 2
COM Common terminal for inputs IN1 and IN2
IN1 Alarm filter input
IN2 Gong input or auxiliary alarm input
VV2+ Output speaker unit 2
VV2- Common speaker unit 2
VV1+ Output speaker unit 1
VV1- Common speaker unit 1
TEL Local Telephone
Optional PSTN-line board
LTI PSTN-line or universal gateway input
Ground terminal
Optional relay board
RL1 Relay contact 1
RL2 Relay contact 2
Jumper JP8 for inputs AL1 and AL2
The jumper JP8 (A in picture 1) defines the behaviour of the inputs AL1 and
AL2.
The inputs AL1 and AL2 are at
+12V; the alarm occurs when
they are closed to a – terminal
(e.g. VV2-).
The inputs AL1 and AL2 are at
0V; the alarm occurs when they
are closed to +12V.