Ms/Tp Specifications For Alternate Cable Solutions - Phoenix Advanced pressure monitor II Installation Manual

APM2 Rough-In Installation Guide
Cable Plenum
Function
Type Rated
4C Yes Shielded
MS/TP
4C Yes Shielded
MS/TP
1
Load is 96 VA when power is provided by a 100 VA transformer with external 4 amp slow blow fuse.
2
Load is 100 VA when power is provided by a 100 VA transformer with internal circuit breaker.

4.5.1 MS/TP Specifications for Alternate Cable Solutions

1. An MS/TP (EIA-485) network shall use shielded, twisted-pair cable with characteristic impedance
between 100 and 130Ω..
2. Distributed capacitance between conductors shall be less that 100 pF per meter (30 pf per foot).
3. Distributed capacitance between conductors and shield shall be less that 200 pF per meter (60 pF per
foot).
4. Foil or braided shields are acceptable. The maximum recommended length of an MS/TP segment is 1200
meters (4000 feet) with AWG 18 (0.82 mm
5. The use of greater distances and/or different wire gauges shall comply with the electrical specifications of
EIA-485 for MS/TP cable requirements.
Wire Primary
Gauge Vendor/Part #
24 Belden 82729
(100 ohm)
24 Belden 88102
(100 ohm)
2
conductor area) cable.
Ancillary Product Specifications
Alternate
Color Code
Vendor/Part #
See 1: White with Blue
specifications stripe
below for 2: Blue with White
alternate cable stripe
solutions 3: White with Orange
stripe
4: Orange with White
stripe
See 1: White with Blue
specifications stripe
below for 2: Blue with White
alternate cable stripe
solutions 3: White with Orange
stripe
4: Orange with White
stripe
Phoenix Recommended Cables
Notes
Shield with
drain
Shield with
drain
35
MKT-0262 MPC-1748 Rev 02/13