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.