Honeywell S7999B Manual page 67

Application:
Description:
Digital Inputs: None
Vessel water sensor
Analog Inputs:
temperature (0-500°F) (100
RTD)
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 File:
Range
Controller
Model (see
footnote)
Algorithm:
CTRALG
TIMER
Output:
OUTALG
Input 1:
IN1TYP
IN1 HI
IN1 LO
Input 2:
IN2TYP
APPLICATION NOTE
Water Temperature Load Control
On-off and modulating outputs to start/stop and adjust firing rate to maintain a control
setpoint.
temp01.nge
0–300°F
1
PIDA
DIS
CURRENT
100H
1200
-300
DIS
G
L1 L1
L2
L2
25
26
27
RTD SENSOR
100 OHM
Digital Outputs:
Analog Outputs:
Ω
temp02.nge
0–300°F
LOW FIRE HOLD
2
PIDA
DIS
CURRENT
100H
1200
-300
DIS
67
S7999B SYSTEM DISPLAY
+ 19
UDC
CONTROLLER
-
21
5
R 6
8
+
SHIELD D+ D-
-
16 17 18 9
C A B
MODBUS COMMUNICATION
HONEYWELL S7810M
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)
PID modulation (4-20mA) to control
firing rate. Modulation based on
modulation setpoint.
temp03.nge
0–500°F
1
PIDA
DIS
CURRENT
100H
1200
-300
DIS
FIRING RATE
MOTOR
INTERFACE
L1
LOW FIRE
HOLD CONTROL
CIRCUIT
L1
ON–OFF CONTROL
BURNER CONTROL
M24241
temp04.nge
0–500°F
LOW FIRE HOLD
2
PIDA
DIS
CURRENT
100H
1200
-300
DIS
65-0283—2