Honeywell CENTRA LINE MERLIN NX Series User Manual

MERLIN NX IP AND MST/TP VAV CONTROLLER - INSTALLATION INSTRUCTIONS
7 EN1Z-1076GE51 R0722
Controller Terminals
Type Legend Printing Description
Power
1 Earth Ground (Connected to power earth ground)
2 V0 Ground
3 ~ Power supply voltage (Connected to 24VAC~)
4 AC OUT 24VAC~ output
5 SR IN SSR POWER input (Connected to terminal 4 (AC OUT) by a jumper wire)
SSR
6 SR1 SSR1 output (if SSR1 is on this pin should be 24VAC~)
7 C Ground
8 SR2 SSR2 output (if SSR2 is on this pin should be 24VAC~)
9 SR3 SSR3 output (if SSR3 is on this pin should be 24VAC~)
10 C Ground
11 SR4 SSR4 output (if SSR4 is on this pin should be 24VAC~)
12 SR5 SSR5 output (if SSR5 is on this pin should be 24VAC~)
13 C Ground
SYLK
14 WM1 Interface for Sylk™ bus
15 WM2 Interface for Sylk™ bus
RS
485
16 + RS 485 Modbus interface
17 - RS 485 Modbus interface
18 COM Ground
UIO
19 IO1
Universal signal input/output1 (Input<"0-20mA" "0-10V" "NTC10K" NTC20K" "RTD" >; Output<"0-
10V" "0-20mA">
20 C Ground
21 IO2
Universal signal input/output2 (Input<"0-20mA" "0-10V" "NTC10K" NTC20K" "RTD" >; Output<"0-
10V" "0-20mA">
22 IO3
Universal signal input/output3 (Input<"0-20mA" "0-10V" "NTC10K" NTC20K" "RTD" >; Output<"0-
10V" "0-20mA">
23 C Ground
24 IO4
Universal signal input/output4 (Input<"0-20mA" "0-10V" "NTC10K" NTC20K" "RTD" >; Output<"0-
10V" "0-20mA">
25 IO5
Universal signal input/output5 (Input<"0-20mA" "0-10V" "NTC10K" NTC20K" "RTD" >; Output<"0-
10V" "0-20mA">
26 C Ground (Connected to 24VAC~ground)/System ground
27 IO6
Universal signal input/output6 (Input<"0-20mA" "0-10V" "NTC10K" NTC20K" "RTD" >; Output<"0-
10V" "0-20mA">
28 C Ground
29 IO7
Universal signal input/output7 (Input<"0-20mA" "0-10V" "NTC10K" NTC20K" "RTD" >; Output<"0-
10V" "0-20mA">
20 VDC
30 C Ground
31
20 VDC
OUT
20VDC power output
BACnet
MS/TP
32
(a
+ Signal for RS 485 bus +
33
(a
- Signal for RS 485 bus -
34
(a
COM Ground
IP ethernet RJ45-1/RJ45-2
(b
(a
Terminal 32,33, and 34 are available in MSTP variant only.
(b
Terminal for IP variant only.

Honeywell CENTRA LINE MERLIN NX Series Specifications

General

Brand	Honeywell
Model	CENTRA LINE MERLIN NX Series
Category	Controller
Language	English