20
LCD-160 Manual —
P/N 51850:D2 10/07/2016
Wiring
Power Supply Connections
6.4 Power Supply Connections
The LCD-160’s 24 VDC power source must be
regulated, filtered, non-resettable, and listed for fire-
protective signaling use. Sources include main power
supplies, auxiliary power supplies, and panels with
integrated power supplies. If RDP devices are to be
powered by separate power supplies, a common
reference connection must be established, see Figure
on page 21. To maintain proper supervision, only one
supply can have ground fault detection enabled.
The power run to the LCD-160 need not contain a
Power Supervision Relay because loss of power is
inherently supervised through communication loss
(loss of RDP communication is registered at the control
panel during loss of power to the LCD-160).
For details about connections to particular control
panels, see the appropriate control panel manual.
Note: On the LCD-160, earth ground is located
on TB1 with the RDP interface.
Figure 6.6 Power Circuit for
the LCD-160
24 VDC Power
A
C
M-
24
-4
8-p
w
r.
cd
r
IN
OUT
IN
OUT
COMMON
+24 V
IN
OUT
IN
OUT
CO
MMON
+24 V
IN
OUT
IN
OUT
COMMON
+24
V
TB2 PWR Supply
TB2 PWR Supply
TB2 PWR Supply
NOTE:
All power must be turned off when connecting the 24 VDC power to the LCD-160. Reapply
power according to the instructions in your control panel manual.
