Operating Manual
Page 19
4.6.1. Relay Module Outputs
Relay No. Signal Description
Terminal Position Contact type
4
Measurement (control) Module 2
(Switching Point 1)
20 & 21
Normally Open
20 & 21a
Normally Closed
5
NOT USED
22 & 23
Normally Open
22 & 23a
Normally Closed
6
Measurement (Control) Module 3
(Switching Point 1)
24 & 25
Normally Open
24 & 25a
Normally Closed
7
NOT USED
26 & 27
Normally Open
26 & 27a
Normally Closed
All E-CO Lineguard 97 relay connections have a spark-quenching circuit through which a
minimal residual current can flow, even if the contact is open.
4.7. Sensor Information and Connections
Module
Sensor
Wiring
1598683
Meas. Module
Conductivity
ind.
689734
Sensor
Electrodeless
Conductivity
1598685
Meas. Module
Conductivity
cond.
1997904
Sensor Contact
Conductivity
1598684
Meas. Module
pH
1598681
Meas. Probe
0-10pH HF res.
2028846
Measuring
module ORP
0-1000mV
2028843
ORP/Redox
Combination
Electrode