Endress+Hauser Mycom S CPM 153 Operating Instructions Manual page 14

4 Electrical connection
!
14
Connections in the front cover
For
pH glass electrode:
For
IsFET pH sensor:
Fig. 8: Terminal assignment in the housing cover of the transmitter
Connections in the back cover
31 33 A L+
32 34 B L–
Fig. 9: Terminal assignment in the lower housing section of the transmitter
4.1.3 Contact assignment
In the basic version, the Mycom S CPM 153 possesses 1 alarm and 2 additional
contacts. The instrument can be upgraded with the following additional equipment:
• 3 contacts
• 2 contacts and 1 current or resistance input (only for non-Ex)
• 1 contact, 1 current input and 1 current or resistance input (only for non-Ex)
The available contacts can be assigned via the software (see the "PARAM" menu
up 1" "Contacts" from page 36)
Note!
• If you use NAMUR contacts (acc. to recommendations of process control engineering
of the chemical and pharmaceutical industry), the contacts are set to the relays as
follows:
– Failure to "ALARM"
– Maintenance required to "RELAY 1" and
– Function check to "RELAY 2".
Selection by software
ALARM
RELAY 1
RELAY 2
• You can assign up to three relays to the controller.
pH Ref PA 12 13 11 S
C H A N N E L 1
12 13 11 S
DRN SRC Ref PA
85 81 93 89 41
86 82 94 90 42 48
NAMUR on
Failure
Warning when
maintenance
required
Function check
Mycom S CPM 153
pH Ref PA 12 13 11 S
C H A N N E L 2
12 13 11 S
DRN SRC Ref PA
47 57
n.c.
L N
58
NAMUR off
Alarm
freely selectable
freely selectable
Endress+Hauser
"Set