Edwards SIGA-REL Technical

Chapter 1 Product design
10 SIGA-REL Technical Reference Manual
Listing agencies
Listing agencies whose codes and standards may apply in your area include:
• Factory Mutual Research Corporation (FM)
• Underwriters Laboratories, Inc. (UL)
• Underwriters Laboratories Canada (ULC)
Specifications
Table 6: SIGA-REL specifications
Power riser
Input voltage
Supervisory current
Alarm current
Line resistance
UL rating
18.4 to 27.4 VDC
25 mA, max.
190 mA min., 4 A max. (depends on output circuit loading)
See Table 7
Must be power-limited
Release circuits, TB4
Release circuit 1 (TB4-1, -2)
Release circuit 2 (TB4-3, -4)
Valves per circuit
Line resistance
End of line device
Supervision
UL rating
Ground fault impedance
2 A at 24 VDC max. [1]
2 A at 24 VDC, max. [1]
4 valves, max.
See Table 8
47 k resistor
Open, short, and ground
Special application, supervised and power-limited
0.0 Ω
Prerelease circuits, TB5
Prerelease circuit 1 (TB5-1, -2)
Prerelease circuit 2 (TB5-3, -4)
Line resistance
End of line device
Supervision
UL rating
Ground fault impedance
2 A at 24 VDC, max. [1]
2 A at 24 VDC, max. [1]
See Table 8
47 k resistor
Open, short, and ground
Special application, supervised and power-limited
0.0 Ω
Manual release input circuit, TB3-1
and TB3-2
Line resistance
End of line device
Circuit capacitance
Supervision
Ground fault impedance
25 /wire, 18 AWG = 3,800 ft (0.75 sq mm = 1,158 m)
47 k resistor
0.1 F, max.
Open and ground
0.0 Ω