Dräger Polytron 8000 Series Technical Manual

64 Technical Manual | Dräger Polytron
®
8000 Series
Instrument settings
Relay configuration: Normally energized
Relay configuration: Energized on alarm
12.9.3 Examples for relay contacts and configuration
This chapter shows examples for the combination of the connected relay contact
and relay configuration depending on the relay status.
The terminology for contacts, configuration and status is similar and can be
confusing.
Relay contacts
Designation of relay contacts to which an alarm indicator is connected.
– Normally Open (NO)
– Normally Closed (NC)
– Common (COM)
Relay configuration
Behavior of the relay during operation.
– Normally Energized
– Energized on alarm
Relay status
Status of the relay coil during operation.
– Energized (Common terminal connects with Normally Open contact)
– De-Energized (Common terminal connects with Normally Closed contact)
Contact Alarm indicator status and fault indication by the alarm
indicator
Alarm triggered Transmitter-spe-
cific fault
Field wiring fault
Normally Closed ON indicated not indicated
Normally Open OFF indicated indicated
Contact Alarm indicator status and fault indication by the alarm
indicator
Alarm triggered Transmitter-spe-
cific fault
Field wiring fault
Normally Closed OFF not indicated indicated
Normally Open ON not indicated not indicated

Dräger Polytron 8000 Series Specifications

General

Ingress Protection	IP66/67
Detection Principle	Electrochemical, Infrared, Catalytic Bead
Gases Detected	Combustible gases, toxic gases, and oxygen
Display	LCD with backlight
Humidity Range	0 to 99% RH (non-condensing)
Housing Material	Stainless steel
Output Signal	4-20 mA, HART, RS-485 Modbus
Power Supply	10 to 30 V DC
Certifications	ATEX, IECEx, CSA
Temperature Range	-40 °C to +65 °C (depending on sensor)