Hach-Lange HACH 5500 sc SiO2 Installation - Manual (Page 17)

Connect to the digital inputs
The analyzer can receive a digital signal from an external device, such
as a flow meter to stop measurements when flow stops. Each discrete
input is used to enable/disable the corresponding sample channel.
Each digital input can be configured as an isolated TTL type digital input
or as a relay/open-collector type input. Refer to
Figure 15 . By default, the
jumpers are set for isolated TTL type digital input. Refer to Wiring
connections overview on page 13 to connect the device.
Figure 15 Isolated TTL type digital input
1 Jumper (12x) 3 Isolated TTL type digital input
2 Digital input connectors 4 Relay/Open-collector type input
Install additional modules
Modules can be added for additional output, relay or communications
options. Refer to the documentation that is supplied with the module.
English 17