Hach sc1000, User Manual

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24
Installation
Figure 20 Expansion Card Ports
3.6.1 Relay Card Connections
DANGER
Relays must either be wired as low or high voltage.
DANGER
Relay loads must be resistive. User must externally limit current to the relays to
5 Amps by use of a fuse or breaker.
The relay connector accepts 18–12 AWG wire (as determined by load application). Wire
gauge less than 18 AWG is not recommended.
If the instrument is equipped with the relay card option, the instrument will include 4
relays, each with one normally closed contact. The relays can switch maximum 250 VAC,
5A (normally closed). Each relay can be configured for limits, status, or timer.
Refer to the Plug-in Expansion Card Instruction Sheet for information on installing the
relay plug-in expansion card.
1. Remove power from the instrument. Remove the probe module cover.
2. Remove the screws on the plastic relay cover. Remove the plastic cover
(Item 10,
Figure 20 ).
1. Relay Card 6. mA Output or Input wiring information
2. Relay wiring information 7. mA Output or Input Card
3. Field-bus or mA Output or Input Card 8. mA Output or Input wiring information
4. Field-bus or mA Output or Input card wiring information 9. Main High Voltage Barrier
5. mA Output or Input Card 10. Relay Voltage Barrier
F2 F1
F4
F3
1
L
N
2
3
4
1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9
YAB019
Output
0000345
YAB018
Input
0000540
YAB020
PROFIBUS-DP
0000000
YAB022
Relay
0001439
0...20mA
max 500
0...20mA
max 500
0...20mA
max 500
0...20mA
max 500
+
-
1
2
+
-
3
4
+
-
5
6
+
-
7
8
9
Analog
Output 1
Analog
Output 2
Analog
Output 1
Analog
Output 2
Analog
Output 3
Analog
Output 4
Output Module YAB019
0...20mA R
+5 V
L H
+
-
JP
R
+5 V
L H
JP
R
+5 V
L H JP
R
+5 V
L H JP
R
R=180
IN1
IN2
IN3
IN4
1
2
0...20mA R
+
-
3
4
0...20mA R
+
-
5
6
0...20mA R
+
-
7
8
9
1
2
3
4
5
6
7
8
9
Analog or Digital
Input Module YAB018
PROFIBUS-DP YAB020
SC 1000
BUS
R
R
R
5V
3
5
IN
B
S2
4
6
S2
7
OUT
B
IN
A
OUT
A
Relay Module YAB022
Relay 1
1
2
250VAC
125VAC
125VDC
30VDC
5A
5A
0,15A
5A
SPST-NC
Relay 2
3
4
Relay 3
5
6
Relay 4
7
8
2 4 6 8
10
9
1 3 5 7
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