System and zone bus supply power wiring guidelines - Verasys - Field Device - ZEC510

Verasys ZEC510 VAV Controllers Installation Guide

Brand
Verasys
Product name
ZEC510
Document type
Installation Guide
Part number
24-10143-01485
Document revision
B
Revision date
2021-04-08
Language
English

Use the following guidelines to wire the system and zone buses and the supply power. See Table 1 for more information about the functions, ratings, and requirements for the ZEC510 input and output terminals.

  • Run all low-voltage and high-voltage cables and wiring separately.
  • Use twisted, insulated, and stranded copper wires for all system and zone bus cables.
  • Use shielded cables for all system and zone bus cables.
  • Refer to the Verasys BACnet MS/TP Communications Technical Bulletin (LIT-12012362) for detailed information about wire size and cable length requirements for the zone bus.
Table 1. ZEC510 wiring details
Terminal Terminal labels Function and electrical ratings and requirements Cable type and length
Analog Input (AI) IN1 Provides an AI connection for discharge air (DA-T) sensor. 0.6 mm (22 AWG) stranded, 2-wire twisted cable for runs of <30 m (<90 ft).
IN2 Provides a BI connection for occupancy sensor dry contact (optional). n/a
IN3 Provides an AI connection for supply air (SA-T) sensor. 0.6 mm (22 AWG) stranded, 2-wire twisted cable for runs of <30 m (<90 ft).
Binary Output (BO) for VAV with staged reheat control OUT1 Provides a BO connection for box heating stage 1. Internal power source: 24 VAC power, 24~ HOT. See guideline C in Table 2
OCOM1 Provides a BO connection for box heating stage 1. Connects OCOM1 to 24~ COM when activated. Internal power source: 30 VAC maximum voltage to load, 0.5 A maximum output current, 40 mA minimum load current. See guideline C in Table 2
OUT2 Provides a BO connection for box heating stage 2. Internally sources 24 VAC power, 24~ HOT. See guideline C in Table 2
OCOM2 Provides a BO connection for box heating stage 2. Connects OCOM2 to 24~ COM when activated. Internal power source: 30 VAC maximum voltage to load, 0.5 A maximum output current, 40 mA minimum load current. See guideline C in Table 2
OUT3 Provides a BO connection for box fan.

Internal power source: 24 VAC power, 24~ HOT.

See guideline C in Table 2
OCOM3 Provides a BO connection for box fan. Connects OCOM3 to 24~ COM when activated.

Internal power source: 30 VAC maximum voltage to load, 0.5 A maximum output current, 40 mA minimum load current.

See guideline C in Table 2
OUT4 Provides a BO connection for supplemental heat. Connects OUT4 to OCOM4 when activated.
Note: Requires external power source: 30 VAC maximum voltage to load, 0.5 A maximum output current, 40 mA minimum load current.
See guideline C in Table 2
OCOM4 Provides a BO connection for supplemental heat.
Note: This common is isolated from all other commons, so jumper 24~ COM terminal if in use.
See guideline C in Table 2
OUT5 Provides a BO connection for box heating stage 3. Connects OUT5 to OCOM5 when activated.
Note: Requires external power source: 30 VAC maximum voltage to load, 0.5 A maximum output current, 40 mA minimum load current.
See guideline C in Table 2
OCOM5 Provides a BO connection for box heating stage 3.
Note: This common is isolated from all other commons, so jumper 24~ COM terminal if in use.
See guideline C in Table 2
Binary Output (BO) for VAV with incremental reheat control OUT1 OUT1 and OUT2 together provide a position adjust output for box heating. OUT1 represents Open and OUT2 represents Close.

Internal power source: 24 VAC power, 24~ HOT.

See guideline C in Table 2
OCOM1 Provides a BO connection for box heating Open. Connects OCOM1 to 24~ COM when activated. Internal power source: 30 VAC maximum voltage to load, 0.5 A maximum output current, 40 mA minimum load current. See guideline C in Table 2
OUT2 OUT1 and OUT2 together provide a position adjust output for box heating. OUT1 represents Open and OUT2 represents Close.

Internal power source: 24 VAC power, 24~ HOT.

See guideline C in Table 2
OCOM2 Provides a BO connection for Box Heating Close.

Connects OCOM2 to 24~ COM when activated. Internal power source: 30 VAC maximum voltage to load, 0.5 A maximum output current, 40 mA minimum load current.

See guideline C in Table 2
OUT3 Provides a BO connection for box fan.

Internal power source: 24 VAC power, 24~ HOT.

See guideline C in Table 2
OCOM3 Provides a BO connection for box fan. Connects OCOM3 to 24~ COM when activated.

Internal power source: 30 VAC maximum voltage to load, 0.5 A maximum output current, 40 mA minimum load current.

See guideline C in Table 2
OUT4 OUT4 and OUT5 together provide a position adjust output for supplemental heating. OUT4 represents Open and OUT5 represents Close.
Note: Requires externally sourced 24 VAC power, 24~ HOT, see Figure 2.
See guideline C in Table 2
OCOM4 Provides a BO connection for supplemental heating Open.
Note: This common is isolated from all other commons, so jumper 24~ COM terminal if in use.
See guideline C in Table 2
OUT5 OUT4 and OUT5 together provide a position adjust output for supplemental heating. OUT4 represents Open and OUT5 represents Close.

Requires externally sourced 24 VAC power,

24~ HOT, see Figure 2.

See guideline C in Table 2
OCOM5 Provides a BO connection for supplemental heating Close.
Note: This common is isolated from all other commons, so jumper 24~ COM terminal if in use.
See guideline C in Table 2
Binary Output (BO) for Multizone unit VAV with proportional reheat control OUT1 OUT1 and OUT2 together provide a position adjust output for supplemental heating. OUT1 represents Open and OUT2 represents Close.

Internal power source: 24 VAC power, 24~ HOT.

See guideline C in Table 2
OCOM1 Provides a BO connection for supplemental heating Open. Connects OCOM1 to 24~ COM when activated.

Internal power source: 30 VAC maximum voltage to load, 0.5 A maximum output current, 40 mA minimum load current.

See guideline C in Table 2
OUT2 OUT1 and OUT2 together provide a position adjust output for supplemental heating. OUT1 represents Open and OUT2 represents Close.

Internal power source: 24 VAC power, 24~ HOT.

See guideline C in Table 2
OCOM2 Provides a BO connection for supplemental heating Close. Connects OCOM1 to 24~ COM when activated.

Internal power source: 30 VAC maximum voltage to load, 0.5 A maximum output current, 40 mA minimum load current.

See guideline C in Table 2
OUT3 Provides a BO connection for box fan.

Internal power source: 24 VAC power, 24~ HOT.

See guideline C in Table 2
OCOM3 Provides a BO connection for box fan. Connects OCOM3 to 24~ COM when activated.

Internal power source: 30 VAC maximum voltage to load, 0.5 A maximum output current, 40 mA minimum load current.

See guideline C in Table 2
OUT4 Provides an AO connection for box heat. Outputs 0 VDC to 10 VDC signal, 10mA maximum output current. Requires 1 k to 50 k ohm load. See guideline A in Table 2
OCOM4 Provides AO connection for box heat.
Note: This common is isolated from all other commons.
See guideline A in Table 2
OUT5 Provides a BO connection for box heating. Connects OUT5 to OCOM5 when activated.
Note: Requires external power source: 30 VAC maximum voltage to load, 0.5 A maximum output current, 40 mA minimum load current.
See guideline C in Table 2
OCOM5 Provides BO connection for box heat.
Note: This common is isolated from all other commons, so jumper 24~ COM terminal if in use.
See guideline C in Table 2
Sensor (SA) bus terminal block +, -, COM, SA PWR Supplies 15 VDC power for SA bus devices. Supports five NS Series Network Zone Temperature Sensors and up to five NS Series Network CO2 Sensors. 0.6 mm (22 AWG) stranded,4-wire twisted cable for runs of <30 m (<99 ft)
Zone (FC) bus terminal block +, -, COM Provides communication network 0.65 mm (22 AWG) stranded, twisted shielded cable for runs of 1,000 ft maximum
24 VAC power HOT AC input supply 20 VAC to 30 VAC (nominal 24 VAC) 0.8 mm to 1.5 mm(20 AWG to 16 AWG) 2-wire
COM 24 VAC power common
Table 2. Cable length guidelines for wire sizes
Guideline Wire size/guage and type Maximum cable length and type Assumptions
A 1.0 mm (18 AWG) stranded copper 457 m (1,500 ft) twisted wire 100 mV maximum voltage drop

Depending on the cable length and the connected input or output device, you might have to define an offset in the setup software for the input or output point.

0.8 mm(20 AWG) stranded copper 297 m (975 ft) twisted wire 297 m (975 ft) twisted wire
457 m (1,500 ft) twisted wire 183 m (600 ft) twisted wire 183 m (600 ft) twisted wire
0.5 mm (24 AWG) stranded copper 107 m (350 ft) twisted wire 107 m (350 ft) twisted wire
B 1.0 mm (18 AWG) stranded copper 229 m (750 ft) twisted wire 100 mV maximum voltage drop

Depending on the cable length and the connected input or output device, you might have to define an offset in the setup software for the input or output point.

0.8 mm (20 AWG) stranded copper 297 m (975 ft) twisted wire 137 m (450 ft) twisted wire
0.6 mm (22 AWG) stranded copper 183 m (600 ft) twisted wire 91 m (300 ft) twisted wire
0.5 mm (24 AWG) stranded copper 107 m (350 ft) twisted wire 61 m (200 ft) twisted wire
C To select wire size and gauge, see Figure 1.

Use stranded copper wire.

To determine cable length, see Figure 1.

Use twisted wire cable.

N/A
Figure 1. Maximum wire length by current and wire size