57
1. The A5xx Controller is rated for 24 A at temperatures up to 45°C (113°F). When the controller operates from 45°C to 60°C (113°F to
140°F), the ampere rating decreases from 24 A to 15 A at a rate of 0.6 A per 1°C. The A5xx Controller is not rated for use in ambient
conditions above 60°C (140°F).
Technical specifications
Table 21: SPST defrost relay electrical ratings
cULus CE
Applied AC voltage
at 50/60 Hz
24 VAC 120 VAC 240 VAC
240 VAC
1
Resistive amperes 10 A
24 A
1
24 A
1
24 A
1
Pilot duty VA 125 VA at 24 to 240 VAC
Table 22: A5xx Series Wall Mount Refrigeration and Defrost Controllers
Product A525
Power consumption 1.8 VA maximum
Supply power 84 VAC to 260 VAC, 50/60 Hz, 10 VA maximum
Ambient conditions Operating: -30°C to 60°C (-22°F to 140°F), 0% to 95% RH noncondensing
Shipping and storage: -40°C to 85°C (-40°F to 185°F), 0% to 95% RH noncondensing
Temperature
sensing range
-40°C to 50°C (-40°F to 122°F)
Input signal
(Sn1 and Sn2)
A99B PTC temperature sensors: 1,035 ohms at 25C (77F)
TS-6340 NTC temperature sensors: 10K ohms at 25C (77F)
Input signal
(UI 4 and UI 5)
0 VDC–10 VDC input for leak detector status or dry contact binary input with a switch wired between
terminals UI 4 and UI 5 and C.
HVBIN signal 120 VAC or 240 VAC
Sensor offset range ±3°C or ±5°F
RS485 Modbus Maximum distance: 100 ft
Default baud rate: 9.6K
Note: Also supports a baud rate of 19.2K
External USB Use a standard USB flash drive to extract hazard analysis critical control point (HACCP) data or
update firmware revision for future upgrades.
Enclosure IP65 watertight, corrosion-resistant, high-impact thermoplastic
Dimensions
(H x W x D)
196.8 mm (7.75 in.) x 190.5 mm (7.5 in.) x 82.6 cm (3.25 in.)
Weight 1.1 kg (2.4 lb)
Compliance United States: cULus Listed; UL60730-1, UL60730-2-9, File SDFY.SA516
FCC Compliant to CFR47, Part 15, Class B
Canada: cULus Listed; CAN/CSA-E60730-1:15, CAN/CSA-E60730-2-9:15, File SDFY7.SA516;
Industry Canada (IC) compliant to Canadian ICES-003, Class B
Europe: CE Mark – Johnson Controls declares that this product is in compliance with the essential
requirements and other relevant provisions of the EMC Directive and Low Voltage Directive; RoHS
Directive
Australia and New Zealand: RCM Mark, Australia/NZ emissions compliant
The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these
specifications Johnson Controls shall not be liable for damages resulting from misapplication or misuse of its products.
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