STU may be terminated in a structure or a splice closure. Input leads are present for moisture detection or security monitoring. Each branch cable is tested separately and in sequence to facilitate locating cable trouble. The STU does not draw any nominal current allowing monitoring of up to 20 terminations on a single cable. The STU is well suited for long haul and dense metropolitan cable configurations. Another version of the Sequenced Termination Unit contains a photocell which is triggered when the splice closure is opened and the contents are exposed to light.

Features

• Up to 20 STU can be used on one monitored cable (one ACU)
• Field programmable codes and baud rates (3, 10, 32)
• Re-programmable with new code or baud rate if relocated or incorrectly programmed
• Compatible with cable and fault locator tones
• Input leads can be attached to MDT or security switches (n/o contacts)
• High reliability including heavy duty surge protection
• Completely encapsulated for operation under severe environmental conditions

Specifications

Protection

• AC VOLTAGE RATING (CONTINUOUS): 150 VAC 60 Hz @ 25C
• DC BREAKDOWN VOLTAGE: 335 – 505 VDC @ 100 v/sec
• IMPULSE BREAKDOWN: 725v (Typical) at 100 v/µsec

1000v (Max) at 1000 v/µsec

• IMPULSE CURRENT RATING: 40,000 A, 8/20 µs impulse, > 1 operation
• 20,000 A, 8/20ΜS, > 10 OPERATIONS
• 1,000 A, 10/1000ΜS, > 400 OPERATIONS

Dimensions:

• 3.5 x 1 x .75 in (8.9 x 2.5 x 1.9 cm)

Weight:

• 0.25 lbs (0.11 kg)

Operating Temperature Range:

• -58°F to +185°F (-50°C to +85°C)

Documentation

• Datasheet
• Warranty