Oldham OLCT 80 User Manual page 102

Display:
Alarms:
Local sensor pack:
Power supply at detector
terminals:
Average power
consumption by sensor
pack type:
Max. power :
Input current (signal):
Output current (signal):
Maximum load resistance
(4-20 mA output):
RS485 output (signal):
■
4-digit backlit LCD screen.
■
Displays reading, gas type, unit, faults and menus.
■
Green indicator light: power.
■
Red indicator light: fault or maintenance.
■
Red indicator lights (2): alarm #1 or alarm #2.
■
2 independent alarm levels per channel.
■
Fault alarm.
■
Relays: 3 independent relays (alarm #1, alarm #2,
fault). RCT dry contact output. Interrupting
capacity: 30 VDC - 250 VAC – 2A.
■
Precalibrated.
■
Either catalytic, electrochemical, infrared (IR) or
semiconductor-type.
■
16-28 VDC (catalytic, infrared and semiconductor
sensors).
■
12-30 VDC (electrochemical sensors).
■
Catalytic: 140 mA.
■
Electrochemical: 80 mA.
■
XPIR infrared: 120 mA.
With digital link
■
0.2 W (electrochemical sensor).
■
1.3 W (catalytic or semiconductor sensor).
■
5.3 W (infrared sensor).
With 25 mA output current
■
0.9 W (electrochemical sensor).
■
2 W (catalytic or semiconductor sensor).
■
6 W (infrared sensor).
With 25 mA output current and relays activated
■
2.4 W (electrochemical sensor).
■
3.5 W (catalytic or semiconductor sensor).
■
7.5 W (infrared sensor).
■
2 independent 4-20 mA inputs.
■ 120 Ω load resistance.
■
Source of coded current from 0-25 mA (non-
isolated).
■
Linear 4-20 mA current reserved for reading.
■
Electronic fault or power failure: 0 mA.
■
Fault: <1 mA.
■
Maintenance mode: 2 mA.
■
Out of range: current greater than 23 mA.
■
Verification: 23 mA.
500 Ω.
Modbus.
13 – Technical Specifications
96