USER MANUAL
Put Bar Code Here
66-2066-01
P520 Signal Processor
APPLICATION
The Honeywell P520 is a rack mounting signal processor that
is compatible with viewing heads in the S5XX and S55XB/BE
series. These include models S506, S509, S511 and S512,
and the advanced viewing head series models S550B/BE,
S552B/BE and S556B/BE. There is only one model of the
P520 available, which is DC powered. A rear backplane PC
Board is required for termination (order part number
REARPCB separately for initial installation).
FEATURES
• Rack mounted system, designed to conform to the DIN
41494 19 inch card frame system
• 3U high and 21HP wide, or 5.06 x 4.18 inches with a
length of 8.66 inches (220mm)
• Once rack mounted, together with a power supply and
appropriate viewing head makes up a complete flame
monitoring system
SPECIFICATIONS
Electrical Ratings
Input Power: 22 - 26VDC, 130mA (plus 100mA for each
Viewing Head.)
Battery Backup: 24VDC, 130mA (plus 100mA for each
Viewing Head.) Main Voltage > Battery Voltage
Ambient Temperature:
0°C to 52°C (32°F to 125°F) CSA Rating
0°C to 60°C (32°F to 140°F) FM Rating
Outputs:
Flame Relay: 2 Form C Contacts (DPDT)
Self-Checking Relay: 1 Form C Contact (SPDT)
Contact Ratings: 5A at 30 VDC, 125 VAC and 277 VAC
Max switching voltage 220Vdc, 250Vac
Analog Flame Signal: 0 to 19.8mA current output for
remote meters and 4 to 19.8mA output. (360 ohm max.
resistance.)
Power to Viewing Head:
+26VDC maximum, fused 0.25A (self-resetting)
+14.3VDC pulsing 0.2 seconds ON, 0.8 seconds OFF
Inputs:
Channel Select (Isolated Input):
7.5-30VDC range
Input resistance 3900 ohms
26VDC maximum, 6.4mA
10VDC, 2.3mA
Flame Signal from Viewing Head (Isolated Input):
7.5-30VDC range
Input resistance 3900 ohms
13.6VDC, 3.2mA
Serial Communications:
RS-422 (Differential)
4800 or 9600 baud (user selected)
4 wire / 2 twisted pair
Cable (between viewing head and signal processor):
4 conductor, #16 AWG or #18 AWG, one wire shielded with
braided shield for flame signal. Honeywell C328 cable is
recommended.
