SoundOff Signal 795H LOW-PROFILE LED User Manual

Page 2

EPL9000 OPTICOM 1.10

9. Indicator Light

The use of an indicator light either in a switch or standalone is highly
recommended. The indicator light, when controlled by the green
wire in the Model 795 harness, will allow the user to determine if the
emitter is:

• Operating normally

o Steady Indication

•In disable mode

o Flashes once every two seconds

•Has failed

o Flashes two times per second

The green wire provides a DC return for the indicator light. When
+12Vdc is provided to one side of an indicator and the green wire
is connected to the other side (or to the light terminal of a lighted
switch, the emitter will control the behavior of the indicator light.
When installing the Model 795 Emitter the OEM should provide
suffi cient wire/cable length to allow the end user to connect the green
wire as described above.

10. J-1708

The Model 795 emitter has a J-1708 compliant communications
port. This port may be used to communicate between the Model 795
emitter and devices such as a control module, MDT, AVL system,
or onboard computer. The communication protocol for the Model
795 is available from GTT. Contact Technical Service to obtain this
document.

11. Emitter programming

Using ITS Link Suite /790-CS and the Model 795 emitter programming
cable the user may program the following parameters into the emitter:

•Vehicle Class Number

•Vehicle ID number

•Disable Operating Mode

•Visible LEDs behavior

ITS Link Suite /790-CS is available for download at: http://www.gtt.
com/Tech-Support-Tools/Software-Downloads.
Version 3.1 or later is required to support the Model 795.

The part number for the 795 programming cable is 79-1000-0157-0.
A serial extension cable is also needed. The GTT part number for this
cable is 26-1014-5721-1.
See the ITS Link help fi le for more details.

7. Switch connections

GTT recommends that the emitter be wired so that it may be
controlled by the control box that operates the rest of the lightbar.
If that is not done, then GTT recommends that a separate lighted
switch be used to control the emitter. See Section 10 for details
on why a lighted switch is needed.

Standalone switches are available from GTT:

•The Model 793B is a lighted rocker style switch which may be
panel mounted or mounted using the include L-Bracket.

•The Model 793S is a lighted fully enclosed push-button switch
which is dash mounted.

8. Disable Wiring

The use of a disable switch is highly recommended so that
emergency vehicle drivers do not need to remember to shut
off their emitter when arriving at the scene. Without using
this feature, nearby intersections may be unnecessarily held in
preemption by vehicles at the scene.

The disable function is entered when the white wire transitions
either from +12Vdc to ground or from a fl oating state to ground.
When installing the Model 795 Emitter the OEM should provide
suffi cient wire/cable length to allow the end user to connect the
white wire as described.

The operation mode of the disable function may be programmed
using ITS Link/790-CS. See section 10 of this document and the
790-CS help fi le for more details.

Global Traffi c Technologies, LLC
7800 Third Street North
St. Paul, Minnesota 55128-5441
1-800-258-4610
651-789-7333
www.gtt.com

Global Traffi c Technologies Canada, Inc.
157 Adelaide Street West
Suite 448
Toronto, ON M5H 4E7
Canada
1-800-258-4610

Programming Cable Assembly

ITS Link/790-CS Screen

790-CS Unit Settings Screen

OPTICOM™ INFRARED SYSTEM
- MODEL 795H LOW-PROFILE LED
EMITTER FOR EPL9000

EPL9000 OPTICOM

Disable Wiring Connection

BATTERY (-)

WHITE

DISABLE SWITCH
(OPTIONAL)

EMITTER CABLE