Controller Terminals - Honeywell Centra Line MERLIN NX Series Installation Instructions Manual

Controller Terminals

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