Ssr (Do) Wiring Examples; 20 Vdc Auxiliary Wiring Examples - Honeywell Centra Line MERLIN NX Series Installation Instructions Manual

MERLIN NX IP AND MST/TP VAV CONTROLLER - INSTALLATION INSTRUCTIONS

SSR (DO) Wiring Examples

SR1 - SR5 Solid State Relay (SSR)
NOTE:
• SR IN (terminal 5, SSR power input) is connected to AC OUT (terminal 4, 24VAC~ output) by a jumper wire at fac-
tory.
• Remove the jumper if different voltages need to be used for SSRs.
• All terminals are protected against short circuit and 24VAC.

20 VDC Auxiliary Wiring Examples

EN1Z-1076GE51 R0722
UL Listed Class 2
Transformer
120 /
240 VAC
100 VA
Earth
Ground
SSR Wiring A With Separate Transformer Without Jumper Installed
UL Listed Class 2
Transformer
120 /
240 VAC
100 VA
Earth
Ground
WHEN CONNECTING POWER TO THE MERLIN IP/MSTP VAV CONTROLLERS,
1
CONNECT THE COM LEG OF THE VAC SECONDARY CIRCUIT TO A KNOWN EARTH GROUND.
Fig. 19 SSR (DO) Wiring Examples
20 VDC Auxiliary
Power Output
Fig. 20. 20 VDC Auxiliary Wiring
18
SSR Wiring With One Transformer And Factory Jumper
24 VAC
COM
1
1 2 3 4 5
MERLIN IP/MSTP VAV CONTROLLER
24 VAC
COM
1
3
1 2 4 5
MERLIN IP/MSTP VAV CONTROLLER
S
Field
M M
Devices
6 7 8
Field Device
Transformer
120 /
240 VAC
Field
M M
Devices
8
6 7