Wiring Terminals; Wiring Diagrams - Siemens RWD44U Installation And Commissioning Manual

Document Number 129-408
October 5, 2009

Wiring Terminals

Wiring Diagrams

Figure 5. Applications 10 Through 19.
Figure 6. Applications 20 Through 39.
CAUTION:
The TOOL signal ground is galvanically connected to G0 inside the controller. If the signal line of the computer
is grounded to Earth, the G0 line after TOOL connection will be grounded as well. This will change the SELV
to a PELV.
Page 8 of
10
NOTE:
Screwed terminals for cables with min
2 × 16 or 1 × 14 AWG.
Figure 4. Wiring Terminals.
RWD44U Controller Installation and Commissioning Guide
G, G0 SELV 24 Vac power supply
Q1 to Q4 Relay outputs: Max. rating 24
C1 Cooling stage 1
C2 Cooling stage 2
H1 Heating stage 1
H2 Heating stage 2
X1 Room temperature sensor
X2 Auxiliary sensor or a digital input
S1 Switch or time clock
PC Personal computer (optional, for
set-up only)
CR1 Compressor stage 1
CR2 Compressor stage 2
CR3 Compressor stage 3
RV Reversing valve relay
X1 Main temperature sensor
X2 Auxiliary sensor or a digital input
S1 Switch or time clock
PC Personal computer (optional, for
set-up only)
NOTE:
D1 Digital input
M Ground (G0) for signal inputs
and universal inputs
to 240 Vac
Vac/5A res/5 FLA/30 LRA/
1/2 HP
X1 Signal input (main input:
Siemens Ni 1000, Pt 1000 and
0 to 10 Vdc)
X2 Signal input (aux input Siemens
Ni 1000, Pt 1000, 0 to 10 Vdc,
and remote setting unit)
Tool Communication port for PC
(9-pin plug)
For a single
compressor, CR2 and
CF3 are not
connected. For a dual
compressor, CR3 is
not connected.
Siemens Industry, Inc.