Crystal Vision
Installation
Indigo 4 User Manual R1.7
12
09/08/2012
Power supply relay connections
Each power supply module has a changeover relay to indicate if the frame is in an alarm
state caused by a power supply problem, a fan stopping or an overheating frame.
Pinout is as follows:
Upper Power Supply (PSU 2) Relay Connections
Description
pin number
relay common
Remote 2 pin 14
open on fault
Remote 2 pin 23
close on fault
Remote 2 pin 5
Power Supply (PSU 4) Relay Connections
Description
pin number
relay common
Remote 4 pin 14
open on fault
Remote 4 pin 23
close on fault
Remote 4 pin 5
Power Supply (PSU 3) Relay Connections
Description
pin number
relay common
Remote 6 pin 14
open on fault
Remote 6 pin 23
close on fault
Remote 6 pin 5
Lower Power Supply (PSU 1) Relay Connections
Description
pin number
relay common
Remote 8 pin 14
open on fault
Remote 8 pin 23
close on fault
Remote 8 pin 5
The PSU alarm relays are grouped in two groups. PSU1 and PSU3 relays act together and
similarly PSU2 and PSU4 relays act together. Should an error occur in the top half of the
frame, say a front panel fan failure or PSU failure, assuming all PSUs are fitted, both
relays situated in that half of the frame will go to the alarm state. Note there may be a
delay between the relays changing state depending on the type of error. This is because
the relay can be controlled both locally by the PSU and by being asserted by the front
panel which could rely on the front panel completing a poll before initialising the alarm.
The failure of any one mains inlet will result in all PSU relays indicating an alarm.
Note:
The current through the relay contacts should be limited to a maximum of 200mA.
