Velocity VDOT-STB-SCI Instruction Manual Download Page 6

GLT-299-7-8  Rev.  0 

Mar  23,  2018 

4) 

Short between terminal 1 and 5, and the yellow SCI indicator is illuminated. The short circuit isolator isolates 

the devices connected after the short-circuited area, which makes these devices have no response. Upon 

removal of the short condition, the area is automatically connected to go back to the normal operating status, 

and the SCI indicator turns off. 

 

Note

: For detector testing and cleaning information, refer to each detector's instruction manual as mentioned in 

Section 4. 

 

Section 8 – SPECIFICATIONS 

SLC Applied Voltage 

Rated Range 20VDC to 38VDC 

SLC Current Consumption 

Standby 100μA    Activated(SCI Isolation) 22mA 

SLC Line impedance 

Up to 50ohms, 2km(1.24mile) (Refer to * below) 

SCI On Resistance 

0.2ohms (max) 

SCI Fault Detection Voltage 

10V (min) 

Visual Indicator 

Status LED

 

SCI

 

LED 

yellow

 

UL Ambient Installation Temperature 

0

(32°F) to 3

8

(100°F) 

Operating Temperature 

-10

℃(14°F)

 to 55

(131°F) 

Storage Temperature 

-20

(-

4°F)

 to 60

℃(140°F)

 

Max Relative Humidity 

Up to 95

  RH

non-condensing 

Environment 

Indoor dry use only 

Terminal 

Terminal for SLC: AWG12 to 20 

Dimensions 

φ105 mm x 22.5 mm H (φ4.133” x 0.885” H) 

(Mount to a 

3-1/2”

 octagonal box

 

Weight 

Approximately    79g    (2.8 ounces) 

Standard 

UL268 and UL521 

 

* Refer to the Installation and Operation Manual of Zeta Control Panel series to determine correct loop load and 

maximum loop resistance for devices connected to each loop. 

 

 

 

 

 

 

 

 

 

 

 

 

 

Summary of Contents for VDOT-STB-SCI

Page 1: ...ns Otherwise it may cause damage to equipment Note Do not install the product in any location where oil dust iron powder chemicals or hydrogen sulphide may occur or affect the product It may cause dam...

Page 2: ...GLT 299 7 8 Rev 0 Mar 23 2018 2 5 6 1 SCI indicator Figure 1 Position of terminals Section 3 DIMENSIONS Figure 2 Dimension of VDOT STB SCI mm inch 105 4 133 22 5 0 885...

Page 3: ...9 7 5 Optional accessory VDOT ADP adapter Use this adapter when VDOT STB SCI is installed with a 4 square electrical box or 4 octagonal electrical box Refer to VDOT ADP Instruction Manual for details...

Page 4: ...ure 5 Connection to terminals For system monitoring for terminals 1 5 and 6 do not use looped wire under terminals Break wire run to provide monitoring of connections CAUTION Before installing the pro...

Page 5: ...n has been evaluated and found suitable for that purpose Section 7 MAINTENANCE Maintenance The VDOT STB SCI is a high quality product engineered for reliability In order to obtain optimum performance...

Page 6: ...nt Consumption Standby 100 A Activated SCI Isolation 22mA SLC Line impedance Up to 50ohms 2km 1 24mile Refer to below SCI On Resistance 0 2ohms max SCI Fault Detection Voltage 10V min Visual Indicator...

Page 7: ...stion or b at the Zeta s option repayment of the price where this had been paid And the warranty period is three 3 years from the shipment from Zeta s factory 1 3 Notwithstanding anything to the contr...

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