Emerson Rosemount 2460 System Hub Reference Manual page 48

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