sepam 20 user manual - Schneider Electric
sepam 20 user manual - Schneider Electric
sepam 20 user manual - Schneider Electric
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DE51659<br />
Installation Communication interface<br />
connection<br />
Sepam series <strong>20</strong> and Sepam series 40 Sepam series 80<br />
PCRED301005EN - 06/<strong>20</strong>08<br />
DE51660<br />
CCA612 connection cord<br />
Plugging into Sepam<br />
Cord used to connect a communication interface to a Sepam base unit:<br />
b Length = 3 m (9.8 ft)<br />
b Fitted with 2 green RJ45 plugs.<br />
Sepam series <strong>20</strong> and Sepam series 40: 1 communication port. Sepam series 80: 2 communication ports.<br />
Connection to the communication network<br />
RS 485 network cable 2-wire 4-wire<br />
RS 485 medium 1 shielded twisted pair 2 shielded twisted pairs<br />
Distributed power supply 1 shielded twisted pair 1 shielded twisted pair<br />
Shielding Tinned copper braid, coverage > 65%<br />
Characteristic impedance 1<strong>20</strong> Ω<br />
Gauge AWG 24<br />
Resistance per unit length < 100 Ω/km (62.1 Ω/mi)<br />
Capacitance between conductors < 60 pF/m (18.3 pF/ft)<br />
Capacitance between<br />
conductor and shielding<br />
< 100 pF/m (30.5 pF/ft)<br />
Maximum length 1300 m (4270 ft)<br />
Fiber optic<br />
Fiber type Graded-index multimode silica<br />
Wavelength 8<strong>20</strong> nm (invisible infra-red)<br />
Type of connector ST (BFOC bayonet fiber optic connector)<br />
Fiber optic<br />
diameter (µm)<br />
Numerical<br />
aperture<br />
(NA)<br />
Maximum<br />
attenuation<br />
(dBm/km)<br />
Minimum optical<br />
power available<br />
(dBm)<br />
Maximum<br />
fiber length<br />
50/125 0.2 2.7 5.6 700 m (2300 ft)<br />
62.5/125 0.275 3.2 9.4 1800 m (5900 ft)<br />
100/140 0.3 4 14.9 2800 m (9<strong>20</strong>0 ft)<br />
<strong>20</strong>0 (HCS) 0.37 6 19.2 2600 m (8500 ft)<br />
6/39<br />
6
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