Specifications - Oldham olct 80 Technical Manual

I X .
I X . S P E C I F I C
S P E C I F I
Sensor
Manufacturer
Type
Gases detected
Detection principles
Range
Sensor block
Material
Casing
Display
Power supply to sensor terminals
Maximum power with digital link
with I output at 25 mA
with I output at 25 mA and relays
activated
Inputs
Outputs:
Logic (relay contacts)
Alarms
Relays
breaking capacity
wiring / connection
Load resistance on the 4 / 20 mA
Loop resistance (on ISC/OLDHAM
central unit)
Fastening lug
Protection factor
Operating temperatures
Dimensions
Weight
ATEX certification
Electromagnetic compatibility
A T I O N S
C A T I O N S
Backlit 4-digit LCD display for measurement and one alphanumerical
line for texts, pictograms - 4 indicator lamps: one green power lamp,
Two independent inputs: 16 to 28 VDC (catalytic / IR / SC sensors)
0.2 W (electrochemical sensor) -1.3 W ( catalytic / SC ) -5.3 W (IR)
0.9 W (electrochemical sensor) -2 W ( catalytic / SC ) -6 W (IR)
2.4 W (electrochemical sensor) - 3.5 W ( catalytic / SC ) -7.5 W (IR)
Two analogue inputs 4-20 mA (load resistance 120 ohms)
analogue
An output of 1.5 mA indicates an optical fault, Temperature outside limit
digital
type
number
contact
Under central unit 21 VDC: 128 ohms ( electrochemical sensor ) - 32
- 25 °C to +55 °C ( electronics, see table for detection cells )
Note: Performance levels are reduced at higher temperatures (max. 70°C):
contact us for details.
Conforms to Directive
94/9/EC, see ATEX
OLCT80(D)
ISC/OLDHAM SA
Detector - transmitter
Explosive, toxic and oxygen
Electrochemical
Infrared (IR)
Semi-conductor (SC)
Pre-calibrated
Stainless steel 316L
one yellow fault lamp, two red lamps for alarms 1 and 2
12 to 30VDC (electrochemical sensor)
3 potential-free relays
Current source encoded from 0 to 25 mA (non-isolated)
4 to 20 mA linear current reserved for measurement
0 mA indicates an electronic fault or no power supply
A 2 mA output indicates calibration mode
An output greater than 23 mA indicates a range overrun
Two independent opto-isolated RS485 ports
2 programmable thresholds per channel
3 (2 alarm + 1 fault)
RCT changer-over
2A / 250 VAC / 30 VDC
Basic version, 6 inputs: 4 M20 and 2 M25
On request: 3 additional, 2 M20 and 1 M25
ohms ( catalytic / SC ) - 16 ohms (IR)
See drawings
See drawings
OLCT 80: 3.5 kg
paragraph
Complies with EN 50270
25
Catalytic
see table
Aluminium
1 pole
500 Ohms
IP 66