Hach 6120118 user manual Wiring the Digital Gateway Cat. No

			Installation
	Table 3 Wiring the Digital Gateway (Cat. No. 6120800)
Sensor (wire color)	Sensor Signal without Ground Rod	Sensor Signal with Ground Rod1	Digital Gateway
Metal Braid2	Jumper 2 from J3-1 to J3-33	Ref	J3-1
White	Temp +	Temp +	J3-2
Red	Temp –	Temp –	J3-3
Blue	Ref	Solution Ground	J3-4
Clear	Active/Measuring	Active/Measuring	J1-5
not used	not used	not used	J1-6

1Some applications require the use of an external ground rod with the combination electrode. Use this wiring scheme for these applications.

2If Metal Braid is “tinned”, cut the tinned area off and twist the wire to insert into connector.

3Customer-supplied (required)

3.2 Connecting/Wiring the Digital Gateway to the sc100 Controller

DANGER

The sc100 and certain versions of the sensor are suitable for use in Class 1, Division 2, Groups A, B, C, D Hazardous Locations . See Control Drawing 58600-78 in the sc100 Controller Manual, Cat. No. 58600-18 for acceptable sensor versions and installation requirements.

DANGER

Le sc100 et certaines versions du capteur peuvent être utilisés dans des endroits dangereux de la Classe 1, Division 2, Groupes A, B, C, D. Reportez-vous au schéma de contrôle 58600-78 du Manuel du contrôleur sc100, Réf. 58600-18 pour connaître les versions des capteurs admises et les conditions d'installation.

The digital gateway should be wired to the sensor before connecting to the controller.

3.2.1 Connecting the Digital Gateway Sensor in a Non-hazardous Location

3.2.1.1 Attaching the Digital Gateway with a Quick-connect Fitting in a Non-hazardous Location

Important Note: The standard quick-connect fitting is NOT suitable for Class 1, Division 2 Hazardous Location installations without the connector lock installed, see section 3.2.1 on page 13 for more information.

The digital gateway is supplied with a keyed quick-connect fitting for easy attachment

to the controller, see Figure 7. Retain the connector cap to seal the connector opening in case the sensor must be removed. Optional extension cables may be purchased to extend the sensor cable length. If the total cable length exceeds 100 m (328 ft), a termination box must be installed. See Replacement Parts and Accessories on page 37.

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