Control Connections - Siemens MICROMASTER Vector Operating Instructions Manual

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3.2.2 Control Connections

Control connections to the MIDIMASTER Vector are made via two terminal blocks located as shown in Figure 3.2.1. The terminal
blocks are of a two-part design. The part containing the screw terminals can be unplugged from it's housing before wires are
connected. When all connections to the terminals have been made (as shown in Figures 3.2.1 and 3.2.2) and secured, the terminal
block must be plugged firmly back into it's housing.
P10+ 0V AIN+ AIN-
1 2 3 4
Power Supply
(+10 V, max. 10 mA)
Analogue Input 1
-10 V to +10 V
0/2 Þ 10 V
(input impedance 70 kW)
or
0/4 Þ 20 mA )
(Resistance = 300W)
Output Relays (RL1 and RL2)
max. 0.8 A / 230 V AC (overvoltage cat.2)
2.0 A / 30 V DC
(resistive rating)
22 23
21
RL2B
RL2C
(NO)
(COM)
P5V+
(for USS protocol)
Control Terminals
Figure 3.2.2: Control Connections - MIDIMASTER Vector
Note: Do not use the internal RS485 connections (terminals 24 and 25) if you intend using the external RS485 connection on the
front panel e.g. to connect an Clear Text Display (OPM2).
DIP switches select between voltage (V) and current (
feedback signal (see Figure 4.1.2: DIP Selector Switches). These switches can only be accessed when:
· for Frame size 4, 5 and 6 the front cover is removed (see Figure 3.2.1).
· for Frame size 7 the lower front cover is removed (see Figure 3.2.1).
3.2.3 Motor Overload Protection
When operated below rated speed, the cooling effect of fans fitted to the motor shaft is reduced. so that most motors require de-rating
for continuous operation at low frequencies. For protection measures using a PTC see section 2.2.5.
G85139-H1751-U529-D1
4/8/99
DIN4
DIN1 DIN2 DIN3
P15+
5 6 7 8
Digital Inputs
(7.5 - 33 V, max. 5 mA)
Power Supply
for PID Feedback
Transducer
(+15 V, max. 50 mA)
A2OUT+
27
24 25 26
P+ N-
PE
Analogue Output 2
0/4 - 20 mA
RS485
(500W load)
use with terminal 13
I
3. INSTALLATION – MIDIMASTER Vector
PIDIN+ A1OUT+ AOUT- PTC
PIDIN-
9 10 11
12 13
Analogue input 2
Analogue Output 1
0Þ10 V
0/4 - 20 mA
or
(500W load)
0Þ20 mA
Motor temp.protection input
Note: For PTC motor thermal
protection, P087 = 1
) analogue inputs. They also select between either a voltage or current PID
30
PTC DIN5 DIN6
14 15 16 17
RL1A
Digital Inputs
(7.5 - 33 V, max. 5 mA)
5 1
9
6
P+ PE (case)
0V
N-
5V(max.250mA)
Front Panel
RS485 D-type
18 19 20
RL1B RL1C
(NC) (NO) (COM)
© Siemens plc 1999