Emerson Rosemount 2460, Справочное руководство

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36
Reference Manual
00809-0100-2460, Rev DE
Installation
October 2018
Installation
Table 3-7. Bus connections to Port 1 - 6 Standard
Table 3-8. Bus connections to Port 1 - 6 for Emulation
Table 3-9. Bus connections to Port 7- 8
Standard
Interface A B A
(1)
1. For daisy-chain
B
(1)
TRL2 (A and B polarity independent)
RS485 (2-wire)
(Modbus, Whessoe 550/660, GPE)
Internally referenced to signal
ground
A B A B
Enraf BPM (A and B polarity independent)
Emulation
Interface A B C COM
Varec Mark/Space
(1)
1. External power supply for powering the bus is required
Mark Space Power
(2)
2. Input voltage maximum 50 Vdc.
Signal ground
(2)
L&J Tankway
(1)
Computer Encoder Power
(2)
Signal ground
(2)
Digital Current Loop (DCL 0-20
mA)
(Whessoe 550/660, GPE)
+ -
Power
(3)
3. External power input (C=+, COM=-). Only used for external loop power. Do not use if Rosemount 2460 System Hub provides loop power.
Signal ground
(3)
Sakura (V1, MDP, BBB) Loop + Loop - Do not use Do not use
TIC (Tokyo Keiso) X Y Do not use Do not use
Host
Interface A B C D COM
TRL2 (A and B polarity independent) N/A N/A N/A
RS485 / 422
(2-wire)
(1)
1. Recommended for redundant systems
A B N/A N/A GND
RS485 / 422
(4-wire)
RD + (A’) RD - (B’) TD + (A) TD - (B) GND
RS232 RxD TxD N/A N/A GND