Edwards Signaling eFSA250 - Manual (Page 25)

Chapter 1: Installation and wiring
E-FSA64 and E-FSA250 Technical Reference Manual 13
Loop card LEDs
There are three LEDs on the card that indicate loop communication status.
Primary is the primary communication circuit. Secondary is the Class A return
communication when wiring is Class A.
Figure 18: Loop card LEDs
Primary
Secondary
Comm
Note: “Comm” refers to overall communication
Alarm, trouble, and supervisory relay wiring
(TB3)
The control panel provides alarm, trouble, and supervisory relays.
• The trouble relay changes over on any trouble event (common trouble)
• The supervisory relay changes over on any supervisory event (common
supervisory)
• The alarm relay changes over on any alarm event (common alarm)
Note: Relay circuits can only be connected to power-limited sources. Relays are
not supervised.
Relay specifications
• Alarm and trouble: Form C, 24 VDC at 1 A resistive
• Supervisory: Form A, 24 VDC at 1 A resistive