Sensor Interfaces - Johnson Controls VMA1400 Series Manual

Sensor Interfaces

AI-1 (Zone Temperature)
+15/Zone Bus COM (Not BCOM)
Mounting and Wiring VMA1400 Series Controllers Technical Bulletin
Figures 3, 4 and 5 show interfaces between room sensors and the
VMA. For more information on the TE-6700 room sensor (including
DIP switch settings), see the TE-6700 Series 2nd Generation
Temperature Elements Installation Bulletin (LIT-216332).
!
CAUTION:
Any of the following situations can cause AI drifting:
• 26 gauge solid wire is crimped in a 18-22 gauge stranded spade
connector.
• Phone jack is poorly crimped.
• Pliers or something other than crimping tool is used to crimp the
spade lug.
• Paint or other material is on phone jack connector.
See the Troubleshooting section for more information.
8-pin Phone Jack
on TE-6700
1
BI-1
2
AI-2 (Setpoint)
3
4
AI-1 COM
5
+15 Volts DC
6
7
AI-2 COM
8
Zone Bus/N3+
O N
1 2 3
Figure 3: TE-6700 Phone Jack Interface to VMA
Intermittent connections can occur when small
gauge solid wire is crimped into large spade lugs
or a when a phone jack is poorly crimped.
Screw
Terminals
Manual
Override
LED*
8
4
1
Sensor
2
5
6
3
7
Preferred DIP Switch
*
Position for TE-6700 (LED On)
1 K ohm
1.6 K ohm
Setpoint Potentiometer
6-pin Phone Jack
on TE-6700
1
+15 Volts DC
2
COM
3
4
5
Zone Bus
6
TE6X
11