88
RS232 & RS485:
FIREYE specific protocol. See NEX-1501 (FIREYE serial
communications protocol manual) for details.
Power supply and boiler I/O board (standard)
RTD input:
3 wire, 0 to 350ºC
Pressure/temp input (0 – 5V):
less than 2mA, ±15V max.
(4 – 20mA)
220W burden, ±50mA max.
Accuracy ±2% full scale.
Operator station interface:
FIREYE specific
Isolated drive board (optional)
Maximum number of servo-motors:
2
Maximum motor current:
150mA RMS
(high voltage pcb)
Maximum motor voltage:
250Vac
(high voltage pcb)
Maximum motor current:
750mA RMS
(low voltage pcb)
Maximum motor voltage:
50Vac
(low voltage pcb)
Potentiometer feedback voltage:
+5V D.C. for pot with full range travel,
+15V D.C. for 340º pot with 90º travel.
Potentiometer resistance2
(set by jumper on PCB)
1 to 5K ohms @ 5V
3 to 15K ohms @ 15V
Number of isolated 4-20mA current
outputs:
2
Maximum loop resistance:
750 ohms
Isolation voltage:
50v
Number of isolated 4-20mA current
inputs:
2
Input impedance:
220 ohms
Isolation voltage:
50v
Flue monitor interface board (optional)
Interface to oxygen probe:
FIREYE specific
Inlet temperature input:
2-wire R.T.D.
Flue temperature input:
Type K thermocouple
Calibration gas solenoid output:
1A @ 24Vac
Number of isolated 4-20mA current
outputs:
2
Maximum loop resistance:
750 ohms
Isolation voltage:
50v (not isolated from each other)
Number of isolated 4-20mA current
inputs:
6
Input impedance:
220 ohms
Isolation voltage:
50v (not isolated from each other)
