39 Accelaterm
®
Installation and Service Manual
APPENDIX C
Upstream
Downstream
CICP2800RS485BD RS-485 Repeater Board Wiring Instructions
The CICP2800RS485BD RS-485 Repeater Board allows commu-
nication between a host computer and Accelaterms that do not have
access to the network via the CICP18ACCNETBD. Multiple Ac-
celaterms can be connected downstream through the 4-wire RS485
bus, as shown in the wiring diagram. See next page for
CICP2800RS485BD installation instructions.
A "Bridge Accelaterm" with access to the network must be config-
ured as a "Bridge" using the shunt option ("Bridge" vs. "STD") lo-
cated on the CICP2800MNRDIBD Accelaterm interface PC board.
Wiring is critical; when used as the "Bridge" (mounted on the Ac-
celaterm and configured as "Bridge") only the bottom four termi-
nals…
• Bridge Out Receive +
• Bridge Out Receive –
• Bridge Out Transmit +
• Bridge Out Transmit –
…are wired to the first downstream Accelaterm top four terminals
respectively:
• STD Transmit +
• STD Transmit –
• STD Receive +
• STD Receive –
All non- Bridge CICP2800RS485BD's are wired to the upstream
CICP2800RS485BD using the bottom four terminals (R+, R–, T+, T–
). All non-bridge CICP2800RS485BD's are wired to the downstream
units (if they exist) using the top four terminals (R+, R–, T+, T–) as
shown in the wiring diagram.
Note: The Accelaterm only supports "Repeat" mode; it does not sup-
port "Multi-drop" modes used in the Superterm and/or Turbo-
Superterm.
SPECIFICATIONS
5VDC / 20mA
CICP18ACCNETBD
CICP2800RS485BD
CICP2800RS485BD
R+
R–
T+
T–
BRIDGE STD
R+
R–
T+
T–
R+
R–
T+
T–
BRIDGE
STD
R+
R–
T+
T–
R+
R–
T+
T–
BRIDGE
STD
R+
R–
T+
T–
R+
R–
T+
T–
BRIDGE
STD
R+
R–
T+
T–
9CICP2800IFPCB
(BRIDGE)
9CICP2800IFPCB
(STD)
9CICP2800IFPCB
(STD)
9CICP2800IFPCB
(STD)
RTX+ (7)
RTX– (8)
RRX+ (9)
RRX– (10)
MT+ (11)
MT– (12)
MR+ (13)
MR– (14)
RPT MD
Superterm or
Turbo-Superterm
(To the
network)
(To the
network)
Bridge
Out
STD
Out
STD
In
STD
Out
STD
In
STD
Out
STD
In
CICP2800RS485BD
CICP2800RS485BD
CICP2800RS485BD
CICP2800RS485BD
CICP2800RS485BD
CICP2800RS485BD