User manual

Chapter 2 Installation
15
2.4 Electrical Installation
With an AC power module, AC power is supplied to the FRM220 through a standard IEC 3-prong receptacle,
located on the rear of the module. With a DC module, DC -48V is connected to the terminal block located on the
rear of the module, observing the proper polarity. The FRM220 should always be grounded through the protective
earth lead of the power cable in AC installations, or via the frame ground connection for DC installations.
Figure 2-4 IEC (AC) & terminal block (DC) power connector pin assignment
2.5 Alarm Installation
The alarm relay provides one set of Power Failure contacts (normally open) and another set of FAN Failure
contacts (normally open) contacts for monitoring the power and fans condition of the FRM220.
Figure 2-5 Alarm Relay Contacts and Cascade Ports
125VAC
1A
110VDC 0.6A
30VDC 4A
I
N
OUT
Alarm Contacts
1 2
Chassis ID
Cascade Ports
Left: Live line
Right: Neutral line
Middle: Ground
Left:
-
V (
-
48V)
Right: +V (0V)
Middle: Frame Ground
DC IN
-V FG +V
36~72VDC
18~36 VDC