Ge Est QS4 - Page 100

Standard applications
5.6 QS4 Technical Reference Manual
TO DATA OUT TERMINALS
ON LAST DEVICE (CLASS A ONLY)
TO
DATA IN TERMINALS
ON NEXT DEVICE
LOOP B+
LOOP B–
LOOP A+
LOOP A–
SLIC
UL/ULC LISTED
22 K EOLR
Ω
24VDC+
24VDC–
PS6
JP2
ACC PWR
SMK PWR
SIGA–UM
12345678
91011121314
3-2-1
2–SMK
Typical Class A two-wire smoke detector circuit
Z(n)–
UL/ULC LISTED
4.7 K EOLR
Ω
ZB16–4
Z(n)+
Typical Conventional Class B IDC circuit
ZONE (n) B–
UL/ULC LISTED
4.7 K EOL
R
Ω
ZA8–2
ZONE (n) B+
ZONE (n) B–
ZONE (n) B+
Typical Conventional Class A IDC circuit
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