Hach-Lange SC 100 - Manual (Page 17)

Installation
Electrical Installation
13
Figure 9 Removing Voltage Barrier
3.3.1 Installation in Conduit
In hard-wired electrical applications, the power and safety ground service drops for the instrument
must be 18 to 12 AWG. See
Figure 10 on page 13 for strain relief and conduit opening sealing plug
information. See section 3.3.3 on page 14 for wiring information.
3.3.2 Installation Using a Power Cord
A sealing-type strain relief to maintain the NEMA 4X/IP66 environmental rating and a power cord
less than 3 meters (10 feet) in length with three 18-gauge conductors (including a safety ground
wire) can be used, see
Replacement Parts on page 39 . See Figure 10 on page 13 for strain relief
and conduit opening sealing plug assembly. See section 3.3.3 on page 14 for wiring information.
Figure 10 Using the Optional Strain Relief and Conduit Plug
1. High voltage barrier 2. Unsnap the barrier latch then pull out to remove the barrier.
NC NC NC COM COM COM NO
F1 F2
NO NO
RELAY C RELAY B RELAY A RELAY A
1
1
+ DATA + DATA
+ OUT 2 + OUT 2
– DATA
– OUT 2
SERVICE REQUEST
SHIELD/CHASSIS GND
+ V + V
+ OUT 1 + OUT 1
GND
– OUT 1
2
2
3
3
4
4
5
5
6
PROBES
ANAL
OG OUTP
UTS
PCB
CONNECTOR
PCB
CONNECTOR
FIELD WIRING
INSULATION MUST
BE RATED TO
80° C MINIMUM
FIELD WIRING
INSULATION MUST
BE RATED TO
80° C MINIMUM
DANGER - EXPLOSION HAZARD
DANGER - RISQUE D'EXPLOSION
DO NOT DISCONNECT WHILE CIRCUIT IS LIVE
UNLESS AREA IS KNOWN TO BE NON-HAZARDOUS.
NE PAS DEBRANCHER TANT QUE LE EST SOUS
TENSION, A MONIS QU'IL NE S'AGISSE D'UN
EMPLACEMENT NON-DANGEROUX
J1
J2
J4
NETWORK
INTERFACE
CARD
J3
J5
J6
U5
U9
S1
NC NC NC COM COM COM NO
F1 F2
NO NO
RELAY C RELAY B RELAY A RELAY A
1
1
+ DATA + DATA
+ OUT 2 + OUT 2
– DATA
– OUT 2
SERVICE REQUEST
SHIELD/CHASSIS GND
+ V + V
+ OUT 1 + OUT 1
GND
– OUT 1
2
2
3
3
4
4
5
5
6
PROBES
ANAL
OG OUTP
UTS
PCB
CONNECTOR
PCB
CONNECTOR
FIELD WIRING
INSULATION MUST
BE RATED TO
80° C MINIMUM
FIELD WIRING
INSULATION MUST
BE RATED TO
80° C MINIMUM
DANGER - EXPLOSION HAZARD
DANGER - RISQUE D'EXPLOSION
DO NOT DISCONNECT WHILE CIRCUIT IS LIVE
UNLESS AREA IS KNOWN TO BE NON-HAZARDOUS.
NE PAS DEBRANCHER TANT QUE LE EST SOUS
TENSION, A MONIS QU'IL NE S'AGISSE D'UN
EMPLACEMENT NON-DANGEROUX
J1
J2
J4
NETWORK
INTERFACE
CARD
J3
J5
J6
U5
U9
S1
2
1
1. Power cord strain relief 2. Conduit strain relief 3. Conduit opening sealing plug
2 3