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Johnson Controls VMA1930, Installation Manual, Page: 12 / 20

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Termination diagrams

A set of Johnson Controls termination diagrams provides details for wiring inputs and outputs to the

controllers. See the figures in this section for the applicable termination diagrams.

Table  6: Termination details

Type of field device

Type of Input/

Output

Termination diagrams

Voltage Input -

External Source

UI

Voltage Input -

Internal Source

UI

Voltage Input (Self-

Powered)

UI

Temperature Sensor

UI

Dry Contact

UI

VMA1930 VAV Controller Installation Guide

12

Summary of Contents for VMA1930

Page 1: ...ence when this equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction m...

Page 2: ...Table 3 5 Dual Port Fitting 6 Manual Override Button see Mounting for information about using manual override Button 7 Controller Coupler see Mounting for information about using the controller couple...

Page 3: ...0mA Analog Input Resistive Mode 0 2k ohm RTD 1k NI Johnson Controls 1k PT A998 SI NTC 10k Type L 2 252k Type 2 Binary Input Dry Contact Maintained Mode 3 Binary Output BO 24 VAC Triac 3 Configurable O...

Page 4: ...ller so that the enclosure walls do not obstruct cover removal or ventilation through the controller Mount the controller so that the power transformer and other devices do not radiate excessive heat...

Page 5: ...ing an 8 mm 5 16 in wrench or 10 mm 3 8 in 12 point socket Tighten to 10 5 to 11 5 N m 95 to 105 lb in 9 Skip this step if you are installing the VMA1626 model Loop the pneumatic tubing supplied by fi...

Page 6: ...port Benefits of daisy chained networks are that they require less physical wiring and new devices can be added easily to the network In a star network each VMA1930 controller is connected by Ethernet...

Page 7: ...inal block is a gray removable 2 terminal plug that fits into a board mounted jack on the upper left of the VMA controller Wire the 24 VAC supply power wires from the transformer to the HOT and COM te...

Page 8: ...dress See Setting the controller number Also activate the EOL switch if necessary 5 Connect the controller to 24 VAC Class 2 power Note If you are using the VMA1615 1626 1628 1630 controller with the...

Page 9: ...1k Platinum and A99B Silicon Temperature Sensor Negative Temperature Coefficient NTC Sensor 10K Type L 10K Johnson Controls Type II is equivalent to Type L or 2 252K Type II See Guideline A in Table 4...

Page 10: ...s Table 4 Cable length guidelines Guideline Wire size Gauge and type Maximum cable length and type Assumptions 1 0 mm 18 AWG stranded copper 457 m 1 500 ft twisted wire 0 8 mm 20 AWG stranded copper 2...

Page 11: ...Communications COM SA Bus Signal Reference and 15 VDC Common SA BUS 2 2 POWER 15 VDC Supply Power for Devices on the SA Bus 0 6 mm 22 AWG stranded 4 wire 2 twisted pairs shielded cable recommended No...

Page 12: ...the figures in this section for the applicable termination diagrams Table 6 Termination details Type of field device Type of Input Output Termination diagrams Voltage Input External Source UI Voltage...

Page 13: ...uator External Source CO 24 VAC Triac Output Switch Low External Source CO Note Applies to CO4 and CO5 Incremental Control to Actuator Switch Low External Source CO Note Applies to CO4 and CO5 Analog...

Page 14: ...ing the controller Setting the controller number Each controller on a network must have a unique number on the subnet where it resides in order to identify it in the Controller Tool for uploading down...

Page 15: ...tions on the input and output terminals including the integrated DPT It assumes all Universal Inputs UIs are Nickel temperature sensors All Configurable Outputs COs are treated as Binary Outputs BOs w...

Page 16: ...uses to trip make sure that the power connections on theVMA1930 are not reversed The most common cause of this problem is when the 24 VAC power supply on the VMA1930 is reversed but not reversed on a...

Page 17: ...Transformer to be Earth Grounded If this is the case verify that the Earth Ground connection is valid and not shared between multiple pieces of equipment Configurable output analog mode is invalid 0 1...

Page 18: ...cm 30 in Primary Leads and 76 2 cm 30 in Secondary Leads Class 2 Y65A13 0 Transformer 120 VAC Primary to 24 VAC Secondary 40 VA Foot Mount Y65AS 20 32 cm 8 in Primary Leads and 76 2 cm 30 in Secondar...

Page 19: ...een 001 and 999 Communications Bus Two Ethernet ports 10 100 Mbps 8 pin RJ 45 connector SA Bus 0 6 mm 22 AWG stranded 4 wire 2 twisted pairs shielded cable recommended from the VMA controller for netw...

Page 20: ...nced Application Controller B AAC based on the ANSI ASHRAE 135 2016 The performance specifications are nominal and conform to acceptable industry standard For application at conditions beyond these sp...

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