Connect To The Relays; Connections Overview; Install The Relay Module - Hach Lange Relay Module Manual Del Usuario

Figure 6 Device connection
8 English

Connect to the relays

C A U T I O N
Fire hazard. Relay loads must be resistive. Always limit current to the
relays with an external fuse or breaker. Obey the relay ratings in the
Specifications section.
C A U T I O N
Chemical exposure hazard. Obey laboratory safety procedures and
wear all of the personal protective equipment appropriate to the
chemicals that are handled. Refer to the current safety data sheets
(MSDS/SDS) for safety protocols.
N O T I C E
Wire gauge less than 18 AWG is not recommended.
The analyzer contains relays for sample concentration alarms (2x),
analyzer system warning and analyzer system shutdown. Refer to

connections overview

on page 7 to connect a device (NO = normally
open, COM = common, NC = normally closed).

Install the relay module

D A N G E R
Electrocution hazard. Always remove power to the instrument before
making electrical connections.
D A N G E R
Electrocution hazard. High voltage wiring for the controller is
connected behind the high voltage barrier in the controller enclosure.
The barrier must remain in place except when installing modules, or
when a qualified installation technician is wiring for power, relays or
analog and network cards.
Wiring