IMP Series
Terminal Configuration
Terminal layout
Communication specification
96
97
98
07
08
Z1
Z2
VT
TRX(+)
05
06
TRX(-)
ZCT
A1 A2
95
96
(+)
(-)
VR
VS
VT
• Operation mode: Differential
• Distance: Max. 1.2km
• General RS-485 shielded twist 2-pair cable
• Baud rate: 9600/19200/38400bps
• Transmission Method : Half-Duplex
• Max. In/Output Voltage : -7V~+12V
Note) 1. When the zero-phase-sequence current transformer is used to detect ground faults, connect the ZCT.
2. When the single-phase motor is used, all phases are connected except the S phase, and open-phase, unbalance and ground fault should be set OFF.
3. It is possible to change settings of output contact(95-96, 97-98, 07-08) at your discretion.
With the External CT
Note 1)
Note) 1. The 3-phase voltage input terminal and 05-06 output terminal should be connected only for voltage protection models, which will be released in the future.
2. For RS485 connection, the terminal resistance should be 120Ω.
3. For 4~20mA current, the maximum burden should be less than 500Ω.
Engrave
Description
Remark
A1(+), A2(-)
Input terminal for operation power
AC/DC85~245V
95-96
When the power is ON (NC contact output)
Settings Menu Reference
97-98
When the power is ON (NO contact output)
07-08
Converted to the NC mode only when an instantaneous trip occurs.
Z1, Z2
Output terminal for the zero-phase sequence current transformer
Specific ZCT (for the EMPR)
TRX(+)
RS485 terminal (TRX+) Or 4~20mA (+) output
M485, A420 Type
TRX(-)
RS485 terminal (TRX-) Or 4~20mA (-) output
VR/VS/VT
3-phase voltage input terminal
Specifications not available for IMP-C models
05-06
Output terminal for voltage protection
Terminal Configuration / Wiring
&
cable connection
LSIS Co.,Ltd.
69