Honeywell S7999D1048, Manual

Page: 59 / 76

S7999D1048 COMBUSTION SYSTEM OPERATOR INTERFACE DISPLAY
59 65-0321—01
Setpoints:
Modulation (0-500°F or 0-750 psi)
On-Off (0-500°F or 0-750 psi)
Low Fire Hold (0-500°F or 0-750 psi)
APPLICATION NOTE
Application: Steam Pressure Load Control
Description: On-off and modulating outputs to start/stop and adjust firing rate to maintain a control
setpoint.
M24242
FIRING RATE
MOTOR
INTERFACE
MODBUS COMMUNICATION
HONEYWELL S7810M
L1
ON–OFF
CONTROL
BURNER
CONTROL
L1
D+
+
-
+
-
R
D- SHIELD
26
27
25
21
19
17 18 16
5
9
8
-
+
6
L2
L1
G
C A B
L1
L2
250 OHM
RESISTOR
STEAM
PRESSURE
SENSOR
(STD 904
SERIES)
UDC
CONTROLLER
Digital Inputs: None Digital Outputs: On-Off relay
Optional: Modulation Alarm1 (ON
when at or below Modulation setpoint,
OFF when above Modulation setpoint)
Optional: Low Fire Hold Alarm2 (ON
when at or below Low Fire Hold
setpoint, OFF when above Low Fire
Hold setpoint)
Analog Inputs:
Steam pressure sensor (0-750
psi) (4-20mA)
Analog Outputs:
PID modulation (4-20mA) to control
firing rate. Modulation based on
modulation setpoint.
Application File:
steam01.nge steam02.nge steam03.nge steam04.nge steam05.nge steam06.nge steam07.nge steam08.nge
Range
0–15 psi 0–15 psi
LOW FIRE
0–150 psi 0–150 psi
LOW FIRE
0–300 psi 0–300 psi
LOW FIRE
0–750 psi 0–750 psi
LOW FIRE