Hach-Lange SC 100 - Manual (Page 19)

Installation
Electrical Installation
15
The DC power source that supplies power to the 24 V DC powered sc100 must maintain voltage
regulation within the specified 24 V DC –15 % / +20 % voltage limits. The DC power source must
also provide adequate protection against line transients.
Figure 12 sc100 Wiring Connections
Table 3 DC Power Wiring Information (sc100 24 V DC powered model only)
Terminal Number Terminal Description Wire Color Code for North America Wire Color Code for Europe
1 +24 V dc Red Red
2 24 V dc return Black Black
3 Protective Earth (PE) Green Green w/yellow tracer
1. J1—Network connector 8. Sensor connector
2. J2—Header for optional network interface card 9. Sensor connector
3. J5—Relay A connector 10. J6—Analog output (4–20 mA) connector
4. J6—Relay B connector 11. J5—Sensor connector for hard-wiring
5. J7—Relay C connector 12. Position for network interface card
6. Fuses (F1, F2) 13. Service port
7. J8—Power connections 14. Sensor terminator selector/service port configuration
a. AC Power connection (AC powered sc100 model only)
b. DC Power connection (24 V DC sc100 model only)
NC NC NC COM COM COM NO
F1 F2
NO NO
RELAY C RELAY B RELAY A RELAY A
J1
J2
J4
NETWORK
INTERFACE
CARD
J3
J5
J6
U5
U9
S1
6
7
7a
7b
14
12
13
3 1 2
8 9
4 5
11 10
+24
VDC
+24 VDC
–24
VDC
–24 VDC