18 95-8661
4.1
specificAtions
OPERATING VOLTAGE—
24 Vdc nominal, operating range is 18 to 30 Vdc.
Ripple cannot exceed 0.5 volt P-P.
OPERATING POWER—
Standard model, with heater and backlight off:
No alarm: 1.5 watts @ 24 Vdc.
Alarm: 3 watts @ 24 Vdc (20 mA current
loop output, and all 3 alarm relays
energized.)
Backlight on: 0.5 watt additional.
Heater on: 3.5 watts additional.
CGS model: Add 4 watts with CGS interface
board and CGS sensor installed.
Maximum power in alarm, with heater and backlight on:
7 watts @ 30 Vdc (Standard model)
11 watts @ 30 Vdc (CGS model)
NOTE
Heater turns on when the internal temperature
drops below –10°C (default operation). Heater
function can be disabled to save power.
NOTE
Appropriate relays will be activated when a fault
or alarm occurs.
CURRENT OUTPUT—
Linear isolated 4-20 mA output with HART.
3.8 mA indicates calibrate mode.
3.6 mA or less indicates a fault condition.
Maximum loop resistance is 600 ohms at 18 to 30 Vdc.
CURRENT OUTPUT RESPONSE TIME—
Toxic gas mode: T90 ≤5 seconds.
Combustible gas mode: T90 ≤4 seconds.
Combustible gas - open path mode: T90 ≤4 seconds.
UD10 w CGS: T90 <12 seconds.
CURRENT OUTPUT ACCURACY—
Toxic gas mode: <1% error.
Combustible gas mode: <1% error.
Combustible gas - open path mode: ≤0.01 LFL/M.
UD10 w CGS: ±3% LFL 0-50 range,
±5% LFL 51-100 range.
RELAY CONTACTS—
Three Alarm Relays: Form C, 5 amperes at 30 Vdc.
Selectable energized/de-energized.
Selectable latching or non-latching.
Refer to Table 1 for range and
default settings.
WARNING
When in non-latching mode, the control device
must latch the alarm output.
One Fault Relay: Form C, 5 amperes at 30 Vdc.
Normally energized for no fault
condition with power applied.
RELAY RESPONSE TIME—
≤ 2 seconds.
WIRING TERMINALS—
14 to 18 AWG wire can be used.
OPERATING TEMPERATURE—
–55°C to +75°C.
STORAGE TEMPERATURE—
–55°C to +75°C.
HUMIDITY RANGE—
5 to 95% RH (Det-Tronics verified).
ELECTRO-MAGNETIC COMPATIBILITY—
EMC Directive 2004/108/EC
EN55011 (Emissions)
EN50270 (Immunity)
DIMENSIONS—
See Figures 12 and 13.
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