External Input/Output Port Wiring - Pentair 920 Series Installation, Operating And Maintenance Instructions

C.5 externaL Input/output port WIrInG
Terminal board
Ext. contact
Output
Ext. contact
Input
Ambient sensing "master" 920 controller
Up to 25 "slave" 920 controllers (50 points)
may be tied to one "master" 920 controller.
Note that the "master" and "slave"
controllers must be installed within the
same enclosure.
INDUSTRIAL HEAT TRACING SOLUTIONS
C.5.1 externaL InhIbIt/overrIde usInG a dry ContaCt
Terminal board
+9Vdc nom
Ext. contact
Input
Common
C.5.2 externaL InhIbIt/overrIde usInG a dC sIGnaL
Terminal board
+9Vdc nom
Ext. contact
Input
Common
C.5.3 tempbus and InhIbIt master/sLave ConneCtIons
+
4
5
–
+
20
– 21
EN- Raychem920series-IM-H56874 05/15
1
20
+
External dry contact
– 21
(Close to activiate inhibit or override mode)
2
(2kΩ max total loop resistance)
1
+
20
+
+
+5VDC to 24VDC nominal, 10ma. max
–
21
–
–
2
Terminal board
+
20 Ext. contact
Input
–
21
Terminal board
+
20 Ext. contact
Input
–
21
Terminal board
+ Ext. contact
20
Input
–
21
"Slave" 920 controller #1
"Slave" 920 controller #2
"Slave" 920 controller #25
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