Det-Tronics R8471NH34001,2,3 Single Channel Gas Controller, NH3 - Manual (Page 5)

3 95-8529 1.1
SENSOR STORAGE LIFE—
6 months when stored in the original factory container
at a temperature between 32°F and 68°F (0°C to
20°C) and a relative humidity between 15 and 90
percent.
CONTROLLER
OPERATING VOLTAGE—
24 vdc. Can operate in the range of 18 to 32 vdc.
NOTE
When an I.S. barrier is used, the input voltage
(measured at the controller) must be between 23
and 26.6 vdc to ensure proper operation of the
sensor and barrier.
POWER CONSUMPTION (CONTROLLER ONLY)—
Base model: 0.7 watt nominal, 1.3 watts maximum
(25 ma nominal, 50 ma maximum at
24 vdc.)
Premium model: 1 . 2 w a t t s n o m i n a l , 3 . 5 w a t t s
maximum (50 ma nominal, 145 ma
maximum at 24 vdc.)
Maximum startup current is 0.6 amperes for 10
milliseconds. Power supplies with fold back current
limiting are not recommended.
MAXIMUM RIPPLE—
Not to exceed 5 volts peak-to-peak.
TEMPERATURE RANGE—
Operating: +32°F to +140°F (0°C to +60°C)
Storage:
-49°F to +185°F (-45°C to +85°C).
OPERATING RANGE—
Cl
2
: 0 to 10 ppm.
SO
2
: 0 to 100 ppm.
NO
2
: 0 to 20 ppm.
SOLID STATE OUTPUTS (BASE MODEL ONLY)—
The outputs are open collector transistors, rated 100
milliamperes at 32 volts dc maximum.
RELAY CONTACTS (PREMIUM MODEL ONLY)—
SPST relays with selectable normally open/normally
closed contacts, rated 5 amperes at 30 vdc/250 vac.
CURRENT OUTPUT (PREMIUM MODEL ONLY)—
4 to 20 milliamperes, with a maximum external loop
resistance of 600 ohms at 20 to 32 vdc, selectable for
isolated or non-isolated operation.
DIMENSIONS—
See Figure 3.
SHIPPING WEIGHT (APPROXIMATE)—
2.0 pounds (0.9 kilogram).
SYSTEM APPROVAL—
The R8471 Controller, base and premium model in
3U and 4U height, has been tested and approved by
FMA. It can be used with any FMA approved sensing
device capable of generating a 4 to 20 ma input.
FMA approval of the R8471 Controller, however, does
not include or imply approval of input devices such as
sensors or transmitters, or devices connected to the
controller outputs. To maintain FMA system approval,
all equipment connected to the controller must be
FMA approved.
NOTE
Ensure sensor hazardous (classified) location
rating is applicable for the intended use.
Figure 2—Junction Box Dimensions in Inches (Centimeters)
➛
➛
9.3 (23.6)
1.0
(2.5)
7.0
*
(17.8)
➛
➛
➛
➛
A1526
*
4U DIMENSIONS SHOWN, 3U HEIGHT IS 5.2 (13.3)
Figure 3—Controller Dimensions in Inches (Centimeters)
B2281
2.7
(6.9)
3.46
(8.8)
1.28
(3.3)
3.77
(9.6)
4.7
(11.9)
5.2
(13.2)
5.86
(14.9)