Additional Pressure Or Temperature Sensors; Output Isolation (Galvanic Separation) - Honeywell EK280 Applications Manual

EK280
Mode input 1: .................. NAMUR protocol encoder a (mode 5)
Battery life: ...................... approx. 5.0 year (readout duration 30 min/month)
Mode input 1: .................. NAMUR protocol encoder a+b (mode 11)
Battery life: ...................... approx. 5.3 years (readout duration 60 min/month)

10.3.3 Additional pressure or temperature sensors

Conditions:
Batteries: ......................... 2 battery packs
Mode input 1: .................. NF pulse input (mode1)
Communication: .............. Data transfer via modem with "Ring" signal,
Outputs: .......................... Not isolated (no galvanic separation)
Display active: ................. Max. 60 minutes per month
Measurement cycle: ..... 30 seconds
Sensors: .......................... 2 pressure sensors, 1 temperature sensor
Battery life: ...................... approx. 5.1 years (readout duration 60 min/month)
Sensors: .......................... 1 pressure sensors, 2 temperature sensor
Battery life: ...................... approx. 5.1 years (readout duration 60 min/month)
Sensors: .......................... 2 pressure sensors, 2 temperature sensor
Battery life: ...................... approx. 5.1 years (readout duration 60 min/month)

10.3.4 Output isolation (galvanic separation)

As described in  chapter 6.9, each of the four pulse and message outputs (terminals "DA1" to "DA4") can
be isolated (galvanically isolated) from the rest of the EK280 circuitry. Isolation of the outputs decreases the
CPU battery life. It is therefore advisable, prior to isolation activation as described in these  chapter, to
estimate battery life.
Each pulse output via an isolated output requires additional power. The battery life therefore depends on the
following factors:
− Number of isolated outputs
Application Manual
approx. 5.0 years (readout duration 10 min/week)
approx. 4.9 years (readout duration 1 min/day)
approx. 5.0 years (readout duration 30 min/week)
approx. 5.2 years (readout duration 2 min/day)
i.e. internal GSM modem or an analog modem connected to terminals
approx. 5.0 years (readout duration 15 min/week)
approx. 5.1 years (readout duration 1 min/day)
approx. 5.0 years (readout duration 15 min/week)
approx. 5.1 years (readout duration 1 min/day)
approx. 5.0 years (readout duration 15 min/week)
approx. 5.1 years (readout duration 1 min/day)
218