Rockwell Automation 1756-L55M12, Руководство по выбору

Страница: 70 / 88

68
1756-SG001G-EN-P — March 2004
Selecting a redundant power supply
To build a redundant power supply system, you need:
y
two redundant power supplies (both 1756-PA75R or 1756-PB75R)
y
one 1756-PSCA2 chassis adapter module
y
two 1756-CPR2 cables to connect the power supplies to the 1756-PSCA2 chassis
adapter module (3 ft length)
y
user-supplied annuniciator wiring to connect the power supplies to the input
modules, as needed
The 1756-PSCA2 chassis adapter module is a passive device that funnels power from
the redundant power supplies to the single power connector on the ControlLogix
series B chassis backplane.
The redundant power supplies are available in ac (1756-PA75R) and dc
(1756-PB75R) versions. They are also available in bundled systems:
Redundant Power Supply Bundle Contents
1756-PAR2
y
two 1756-PA75R power supplies
y
two 1756-CPR2 cables
y
one 1756-PSCA2 chassis adapter module
1756-PBR2
y
two 1756-PB75R power supplies
y
two 1756-CPR2 cables
y
one 1756-PSCA2 chassis adapter module
Specification
Power Supplies Adapter
1756-PA75R 1756-PB75R 1756-PSCA2
Nominal Input Voltage 120V/220V ac 24V dc
na
Input Voltage Range 85…265V ac 19…32V dc
Maximum Real Input Power 115 W 110 W
Maximum Apparent Input Power 120 VA na
Maximum Transformer Load 120 VA na
Input Frequency 47…63 Hz dc
Maximum Backplane Output Current
1.5A @ 1.2V dc
4A @ 3.3V dc
13A @ 5V dc
2.8A @ 24V dc
75W total 1.5A @ 1.2V dc
4A @ 3.3V dc
13A @ 5V dc
2.8A @ 24V dc
75W total
Hold Up Time
✶
60 Hz
85V ac: 2 cycles
120V ac: 6 cycles
220V ac: 20 cycles
20ms @ 19V dc
70ms @ 24V dc
Chassis Compatibility series B series B series B
Location panel mounted† panel mounted† left side of chassis
Certifications: UL, CSA (Class I, Division 2, Group A, B, C, D), CE, FM, C-Tick
✶
The hold up time is the time between input voltage removal and dc power failure.
†This can be a maximum of 0.91 cable-metered (3 cable feet) from the ControlLogix chassis.