User`s guide

V3-T9-104 Volume 3—Power Distribution and Control Assemblies CA08100004E—November 2013 www.eaton.com
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9.3
Metering Devices, Protective Relays, Software and Connectivity
Metering Devices
Technical data and Specifications
External Circuit Group Specifications
PXMP-MB (-AB) Meter base
Discrete Output
●
Quantity 1—solid-state relay Form A NO Bidirectional FET
●
Polarity of external source is not important
●
Isolation circuit to ground 2 kV/1 min.
●
Maximum external source voltage 28 Vdc
●
Line-to-line TVS clamp across switching element at 32 Vdc
●
Solid-state relay on resistance 35 ohms maximum
●
Maximum load current 80 mA
●
Minimum pulse width 20 milliseconds
●
Fixed 25 milliseconds for pulse initiator function
●
Maximum pulse rate 25 Hz
●
Wiring to two-position removable terminal plug
●
12–18 AWG (3.31–0.82 mm2), wire ferrules recommended
●
T1 (polarity not important)
●
T2 (polarity not important)
Discrete Inputs
●
Quantity 3, common circuits inputs 1–3
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Group isolation 2 kV
●
No input-to-input circuit isolation
●
All inputs per module share a common external
24V (±10%) supply
●
24V externally sourced between common and inputs
●
Design to interface with external dry contact
●
Input impedance ~2.2K ohms
●
Input current draw ~10 mA per input
●
Minimum pulse width 10 milliseconds
●
Maximum pulse rate 20 Hz
●
Wiring to four-position removable terminal plug
●
12–18 AWG (3.31–0.82 mm2), wire ferrules recommended
●
T3—Common (connect ext. 24 common here)
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T4—Input 1 (dry contact to 24V hot)
●
T5—Input 2 (dry contact to 24V hot)
●
T6—Input 3 (dry contact to 24V hot)
COM1 and COM2 RS-485 Serial Ports
●
No D+/D– biasing reliance on fail-safe driver and biasing at
Master
●
Baud rate configurable between 9600–115K baud (default)
●
Use cable designed for RS-485 communications
●
Low L:L capacitance
●
Impedance of ~100–120 ohms
●
Shield—Mylar for high frequency; Braid for low frequency
●
Separate common and shield for best noise immunity
●
Maximum cable length is 4000 ft (1219.2m) with 32 nodes
at 19.2K baud increased data rates will reduce maximum
cable distance
●
2000 ft (609.6m) with 32 total nodes at 115.2K baud
●
Isolation 300V to ground due to TVS diode clamps
●
Modbus RTU slave protocol, address defined by rotary switch
●
Green Rx and Red Tx LEDs per channel
●
Data + > Data—during idle marked, logic 1 state
●
End of Line Termination resistance should match cable
impedance (typ. 100–120 ohms)
●
Four-position removable terminal plug 18–22 AWG (0.82–0.33
mm
2
) typical, wire ferrules recommended
●
COM1
– T7—Shield
– T8—RS-485 common
– T9—Data –
– T10—Data +
●
COM2
– T11—Shield
– T12—RS-485 common
– T13—Data –
– T14—Data +
PXMP-MB Power Supply Input
●
24 Vdc ±20%
●
15W maximum load
●
1 kV isolation barrier internal to PXMP-MB
●
Externally fuse circuit to protect wire
●
Green power OK LED
●
Three-position terminal block 16–12 AWG (1.31–3.31 mm2),
wire ferrules recommended
●
T15—24 Vdc – (common)
●
T16—24 Vdc + (Hot)
●
T17—Shield (optional) capacitively referenced to chassis
ground for enhanced EMC performance
Meter Voltage Inputs
●
Overvoltage CAT III
●
Maximum voltage rating
●
480VL:G (corner grounded delta)
●
347VL:N
●
600VL:L
●
Frequency rating 47–63 Hz
●
Metering range (temporary transitions)
●
30–700VL:N
●
30–700VL:L
●
Abuse withstand rating 1000V sustained
●
High pot withstand rating 2500V/1min
●
Input impedance 4M ohms
●
Fuse inputs rated to protect wiring to mains. External fuses
●
must be installed between the meter voltage terminal and the
mains disconnect switch to the main lines to protect the lines.
600V 1 A BUSS type KTK-R-1 Fast Acting or equivalent fuses
●
are recommended.
●
Wiring to removable terminal plug 10–18 AWG (5.26–0.82
mm
2
), wire ferrules recommended
●
T18—N (VR)
●
T19—C (V3)
●
T20—B (V2)
●
T21—A (V1)