3
95-8676
3.1
SPECIFICATIONS
INPUT VOLTAGE (All Models)—
24 Vdc nominal. Operating range is 18 to 32 Vdc.
Ripple cannot exceed 0.5 volts Peak-to-Peak.
POWER CONSUMPTION (All Models)—
Detector without Relays
4.0 watts nominal @ 24 Vdc
7.5 watts peak @ 24 Vdc
10.0 watts peak @ 32 Vdc.
Detector with Relays
5.5 watts nominal @ 24 Vdc
8.0 watts peak @ 24 Vdc
10.0 watts peak @ 32 Vdc.
TEMPERATURE RANGE—
Operating: See CSA, ATEX/CE, and IECEx Appendices.
Storage:
–55°C to +85°C (–67°F to +185°F).
HUMIDITY—
0 to 99% relative humidity (Det-Tronics verified).
GAS DETECTION RANGE—
0-2%/vol factory default
DETECTABLE GAS—
Carbon Dioxide (CO
2
)
DETECTOR CONFIGURATION OPTIONS—
A significant number of PIRECL configuration parameters
are field programmable including measurement
range, alarm setpoints, tag number, special notations,
password protection, etc. Details are provided in the
HART Communication Appendix. Two PIRECL field
configuration programming methods are supported:
–
HART Communication
–
RS-485 MODBUS Communication
THIRD PARTY ADDRESSABLE MODULE (Optional)—
Input Voltage: 30 Vdc.
Input Current: 30 mA.
WARM-UP TIME (All Models)—
Device enters normal mode after two minutes upon cold
power-up. One hour warm-up time is recommended
for optimum performance. Signal output level during
warm-up is programmable.
CURRENT OUTPUT—
Linear 4-20 mA (current source/sink, isolated/non-
isolated) rated at 600 ohms maximum loop resistance @
24 Vdc operating voltage.
VISUAL STATUS INDICATOR (All Models)—
Tri-color LED:
Red =
Low alarm, high alarm, or calibration.
See Table 1 for Details.
Green =
Power on / OK
Yellow =
Fault or warm-up.
RELAY OUTPUTS (Optional)—
Available on Ex d approved models only.
ALARM RELAYS—
Low and High
Form C Type (NO/NC).
De-Energized during Normal mode, Energized on Alarm.
Contact Rating: 5 amperes at 30 Vdc.
Programmable for Latching or Non-Latching Operation.
Setpoint Range (both): 10-60% of range.
Factory Default Settings:
Low:
40% of range – Non-latching
High: 60% of range – Non-latching
Alarm relay programming can be accomplished using
HART or MODBUS.
CAUTION
The PIRECL CO
2
Gas Detector should be used in
conjunction with an appropriate certified Control
Unit and configured for a non-latching high alarm.
The control unit must
always
latch and require a
deliberate manual action to clear a high gas alarm.
When used as a stand alone device, the high alarm
must always be programmed for latching operation.
