Honeywell AQ25A Series Technical Reference Booklet page 176

AQ255 AND AQ257 SERIES EXPANSION ZONING PANELS
LOW
VOLTAGE
(24 V)
LINE
VOLTAGE
(120 V)
69-1981—03
ZONING MODULE
Zone 1 Zone 2 Zone 3 Zone 4
Fig. 1. AQ255 Expansion Zoning Panel Layout (AQ25582B shown).
TRANSFORMER
Fig. 2. AQ257 Expansion Zoning Panel Layout (AQ25744B shown).
ZONING MODULE
Zone 1 Zone 2 Zone 3
ZONING MODULE
Zone 1 Zone 2
4
LOW VOLTAGE
(24 V)
Zone 4
LINE VOLTAGE
(120 V)
M27831A
LOW VOLTAGE
(24 V)
Zone 3 Zone 4
LOW VOLTAGE
(24 V)
M27832A