User Manual

Installation

8LS User’s Guide 29

Digital Outputs On The Screw Terminal Blocks

NOTE

Alarms and events outputs are sinking +5vdc to

ground when the output is ON. They should be

connected to the minus (-) side of SSRs.

Connections are made as follows:

See Terminal Block and Connector Layout.

Primary Analog Outputs

The 8LS provides either 4 to 20mA with 500 ohms maximum load or 0-

5vdc at 5mA maximum. Selection is made on internal dip switches.

The control outputs are shipped as voltage outputs, and can be

converted from voltage to current by changing the dip switch settings on

the control output card. If you are using the output as a digital mode,

such as TPV, you should leave the output in voltage mode. These

switches are accessible from the top of the electronics assembly after it

has been removed from the housing.

There are two dip switch packages on the Output Card, each with 8

switches. Each channel requires two switches. The dip switch package

near the rear panel controls the odd numbered outputs, while the dip

switch package near the front panel controls the the even channels.

When the unit is viewed from the top, with the rear panels to the left, the

channels are in ascending order from left to right [See silk screen on the

printed circuit board].

For each channel, a switch pair will have the switches set in

complementary states. If the first switch of the pair is down and the

second is up, the output is in voltage mode. If the first is up and the

Alarm

SSR 1

Event

SSR 2

Control

SSR 3

Screw Terminal

Block 2

ital Out 1

(Alarm ON/OFF)

ital Out 2

(Event On/Off)

+5Vdc Suppl

PID Ctl Out 1+

(TP or On/Off)

ic Ground