MERLIN NX ROOM CONTROLLER – INSTALLATION & COMMISSIONING INSTRUCTIONS
3 EN1Z-1035GE51 R0420
Wall Mounting/Dismounting
The unit can be mounted on floors, walls, and ceilings in any
desired orientation. (See also section "Ambient
Environmental Limits" on pg. 27 for temperature range
restrictions with floor/ceiling mounting.)
The unit is mounted by inserting optional screws
(recommended: DIN EN ISO 7049 – ST4,2x22 – C – H)
through the corresponding screwing noses.
99.5
RLxN: 187.5
RSxN: 151.5
DIN EN ISO 7049 – ST4,2x22 – C – H
7
T01
8
TN
9
T02
1
L
2
N
3
24V~
4
24V0
5
TN
6
T~
10
RO4
11
IN4
12
RN
13
RN
14
IN1
15
RO1
16
IN2
17
RO2
18
IN3
19
RO3
WM1
20
C2+
23
C2-
24
WM2
21
34
UI1
36
UI2
37
UI3
39
UI4
35
GND
38
GND
26
AO1
27
24V~
28
GND
29
AO2
30
AO3
31
24V~
32
GND
33
AO4
41
C1-
40
C1+ GND
42
BACnet MS/T P
SERVICE
22
24V~
25
GND
Fig. 7. Drilling template (view from above)
After mounting the unit onto the wall, snap the appropriate
terminal protection covers (see Fig. 4 and Fig. 5 on pg. 2) into
place onto the housing by hand.
NOTE: In the case of wall-mounting, optional terminal pro-
tection covers (in the case of the RLxN [large
housings]: IRM-RLC; in the case of the RSxN [small
housings]: IRM-RSC) must be installed in order to
comply with IP30.
The covers can be fixed into place using optional screws
(recommended: DIN EN ISO 7049 – ST2,9x9,5 – C (F) – H).
To remove a cover, place a screwdriver in the two leverage
slots (marked with arrows) and pry it loose.
TERMINAL ASSIGNMENT
General
For a complete list of all terminals and a description of their
functions, see Table 2 and Table 6.
NOTE: All terminal blocks capable of carrying either low
voltage or line voltage are orange-colored.
The delivery includes a plastic bag containing additional,
removable terminal blocks for BACnet MS/TP and Sylk
interfaces.
The controller is powered by 230 VAC, and is equipped with
differing numbers of triac outputs, relay outputs, etc. capable
of being configured in a variety of ways. See Table 1 on page
1.
Every controller features a terminal assignment label on the
top of the housing.
Power Supply Terminals
▪ Power is supplied via an orange-colored fixed screw-type
terminal block (terminals 1+2).
See also section "Power Supply" on pg. 11.
Input / Output Terminals
The controller features rows of terminal blocks on the top and
bottom.
▪ In the case of the RLxN (large housing), the controller has
double rows of analog outputs (AOs) and universal inputs
(UIs) at the top and a single row of binary outputs (BOs) –
triacs (TRs) and relay outputs (ROs) – at the bottom.
▪ In the case of the RSxN (small housing), the controller
has a single row of analog outputs (AOs) and universal
inputs (UIs) at the top and a single row of binary outputs
(BOs) – triacs (TRs) and relay outputs (ROs) – at the
bottom.
NOTE: According to VDE guidelines, it is not allowed to mix
low-voltage and high-voltage signals on the relays
and triacs.
See also section "I/O Terminals" on pg. 22.
Communication Interfaces
All models of the controller feature the following communi-
cation interfaces:
▪ A Sylk Bus interface (RSxN: terminals 20 and 21; RLxN:
terminals 30 and 31), for connection to TR40x/42x Wall
Modules;
▪ An isolated RS485 interface (RS485-1) for use with
BACnet MS/TP (RSxN: terminals 40, 41, and 42; RLxN:
terminals 62, 63, and 64);
▪ An RJ45 connector for connection of the BACnet WiFi
Adapter;
▪ A non-isolated RS485 interface (RS485-2), for use with
Modbus (RSxN: terminals 23, 24, and 25; RLxN: terminals
26, 27, and 28).
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