Johnson Controls FX80 User Manual

Figure 5: Earth ground and power options
Depending on the power source used:
• 2.1 (AC): Dedicated 24 V transformer required, with neither side of the transformer secondary
tied to ground.
• 2.2 (DC): Polarity is not important (uses onboard diode bridge), with neither leg tied to ground.
• 2.3 (Wall-mount AC adapter, FX-SC8XPS-0) instead of wiring 24 V to 2-position connector. Do not
use the wall-mount AC adapter simultaneously with power wired 2-position connector.
Wiring earth ground and power
Important: Before making power terminations, de-energize the 24 V power source. Do not
restore power until completing all other mounting and wiring.
Important: A grounding point must be present nearby.
1. Install the included earth ground wire to the controller's earth ground spade lug, and
terminate the other end to a nearby earth ground.
2. Unplug the controller's 2-position power connector plug and terminate the 24 V supply source
(AC or DC) to the connector. Leave the connector unplugged.
Communications wiring
FX80 Supervisory Controller Installation Instructions6

Johnson Controls FX80 Specifications

General

Brand	Johnson Controls
Model	FX80
Category	Controller
Language	English