RKI Instruments M2 Rig Monitor - Manual (Page 12)

7 M2 Rig Monitor Operator’s Manual
signal may be used by a recording device, gas monitor controller, or programmable
controller. The Modbus output may be used to connect the Rig Monitor to a Modbus
network. The terminal PCB also controls three relays, one fail and two gas alarm relays.
Two columns of plug-in style terminal strips are used to make all wiring connections to
the terminal PCB. The column on the left consists of the power/signal, detector, and
Modbus terminal strips. The column on the right consists of the relay terminal strips. A 20
position connector at the bottom of the terminal PCB is used to connect the terminal PCB
to the control PCB with a ribbon cable. A 5 position connector on the left side of the
terminal PCB is used by factory or field service personnel to program the Rig Monitor.
Power/Signal Terminal Strip
The power/signal terminal strip is a three position plug-in style terminal strip located at
the top of the left terminal column. If is factory wired to the power converter and strobe/
horn.
Detector Terminal Strip
The detector terminal strip is a four position plug-in style terminal strip and is the middle
terminal strip in the left terminal column. Only the bottom 2 terminals are used for
connecting the H
2
S detector. It is factory wired to the H
2
S detector.
Figure 5: Detector Terminal Strip
Modbus Terminal Strip
The Modbus terminal strip is a three position plug-in style terminal strip and is the
bottom terminal strip in the left terminal column. It allows connection of the Rig Monitor
into a Modbus network.
-
S
+
PWR
/S
IG
+
-
+
-
TO
X
IC
O
X
Y
TO
X
IC
O
X
Y
C
NC
N
O
C
NC
N
O
AL
A
R
M
1
F
A
IL
+
-
+
-
PW
R
/S
IG
-
S
+
Oxy/Toxic Detector
Terminal Strip
A
B
C
R
S
485
A
B
C
R
S
485 AL
A
R
M
2
C
N
C
N
O