Basic Documentation

298/332
Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Appendix 03.10.2011
N.X1
Y
SIGNAL Y
x
SAT
Supply air temperature Basic type A only, sensor as described under "Sensors for °C", for
the following functions:
 Controlled variable for supply air temperature
N.X1
x
Frost protection Frost prot. function selectable for sequence controllers 1, 2, 3 for:
 Water-side frost protection (input LG-Ni 1000) with 2 stages,
PI control when plant is switched off
 Air-side frost protection (input DC 0…10 V = 0…15 °C) with 2
stages
 Frost protection unit
 Preheating function
N.X1
x
Frost protection unit 1
Frost protection unit 2
Frost protection unit 3
 Frost protection unit, direct acting on corresponding sequence
controllers 1, 2, or 3
N.X1
x
[Controller 1] rem setp adj
[Controller 2] rem setp adj
[Controller 3] rem setp adj
Rem setp adjuster relative
 Remote w1: Absolute for sequence controllers 1..3 (0..1000  or
DC 0...10 V)
 Remote rel: Relative for room temperature with basic type A
sequence controller 1 (1000...1175 O = -3...+3 K)
N.X1
x
Pulse Select input identifier "Pulse" for an input.
 Connection of a pulse source (mechanical or electronic)
 Pulse source type can be assigned to the input
Open and closed-loop control functions
Controller
 Section 11, 12, 13, 14
Configuration Functions
S3 S2 S1 S4 S5
yp yp yp yp yp
a
d
Controller 1
(Ventilation)
With supply air limitation
Cascade
Constant (supply air)
Cascade/const (alternating)
Seq. limit. Casc/Const
Controller 1, basic type A:
 Sequence limiter (seq. limiter)
 Casc/const changeover input
 Sequence S1…S5 load (y)
 Sequence S1…S5 pump (p)
 Control strategy
Sequence controller, can be used as a P, PI or PID controller.
 The following control modes are available:
 Supply air temperature control
 Room temperature control (with optional limitation of supply air)
 Extract air temp. control (with optional limitation of supply air)
 Room/supply air temperature cascade control
 Extract air/supply air temperature cascade control
 Configurable sequence assignments; one load output (modulating
output A…D, heat recovery unit, mixed air damper, step switch
1…5) and a pump can be connected to each sequence
 Heating sequences S1, S2 and S3 (\\\_)
 Cooling sequences S4 and S5 (_//)
 Supply air temperature limiter acts on all sequences
 Sequence limiter, adjustable as min or max limiter, acts on a
settable sequence (closing)
 Sustained mode room temperature
 Night cooling of room
 fan speed at large heating or cooling load in room
 Summer/winter compensation with outside temperature
 Sequence locking acc to OT
 Fault message for unacceptable control deviation can be
activated
S3 S2 S1 S4 S5
yp yp yp yp yp
aa aa
Gen limit Seq limit
Controller 1 (Primary supply air)
Controller 1 basic type P:
 Universal shift ( )
 General limiter (gen. limiter)
 Sequence limiter (seq. limiter)
 Sequence S1…S5 load (y)
 Sequence S1…S5 pump (p)
Activate sequence controller dependent on demand, settable as P,
PI or PID controller, for demand-dependent supply air temperature
control related to individual room controller (supply air temperature
sensor readily wired to N.X1).
 Configurable sequence assignments; one load output (modulating
output A…D, step switch 1…5) and a pump can be connected to
each sequence
 Heating sequences S1, S2 and S3 (\\\_)
 Cooling sequences S4 and S5 (_//)
Frost n
Pulse
Frost
Rem-