Connecting Sesa to Mesa with modems

1. Connecting Sesa to Mesa with modems

FIRE
FAULT
24
+ 1 - + 2 -
+ 3 - + 4 -
nc
TE1
IN4
IN5
SERVICE
OPT
+
CO1
CO2
CO3
24V
+
24V
RS-485 INFO
to FMP
TE13
TE2
R+
RT+
T-
TxD
IN3
RxD
IN2
GND
J6
IN1
24VDC to FMP
Esa CB
J1
1 2 3 4
CODI
T/R
R
DSR
RD
TEST
TD
GND
RTS/
DTR
J1
RCV G XMT
- +
- +
red
red
J2
2-W 4-W LEDs
7: RTS (out)
6: DSR (in)
5: GND
4: DTR (out)
3: TXD (out)
2: RXD (in)
RCV G XMT
- +
- +
green
9 pin D-connector
J3
24V
Set Opt.port
jumpers to:
R+ <--> T+
R- <--> TNext Sesa/ Mesa
DCE
R
DTE
T/R
J3: ON
J2: 2-WIRE J1
J1: OFF
RS232
DTE
red
red
J2
2-W 4-W LEDs
7: RTS (out)
6: DSR (in)
5: GND
4: DTR (out)
3: TXD (out)
2: RXD (in)
9 pin D-connector
24V
green
DCE
CODI
J3
DSR
RD
TEST
TD
GND
RTS/
DTR
Red LEDs in CODI will show
transmitted and received data
Voltage levels at CODI-RAD RS-232 must be:
The green power LED is on when connection
is done with D9<--->D25 converter
and handshake signals are on.
Mesa
GND <---> RD =~-4VDC (NEGATIVE)
GND <---> TD = ~-4VDC (NEGATIVE)
If not, change switch in RAD modem
to another position (changes TD<-->RD)
J3: ON
J2: 2-WIRE
J1: OFF
CODI
green
red
T/R
red
J2
2-W 4-W LEDs
R
Next Sesa/ Mesa
40-2001
1(1)
DSR
Version 1.0
RD
26.1.2022
TEST
TD
GND
RTS/
DTR
J1
K20020GB1
7: RTS (out)
6: DSR (in)
5: GND
4: DTR (out)
3: TXD (out)
2: RXD (in)
RS232
9 pin D-connector
24V
J3