Saia-Burgess Controls AG
Manual
Manual PCD 1 / PCD 2 Series
│ Document 26
/
737 E
N22 │ 2013-11-26
4
Communication interfaces
4-43
MP-Bus PCD2.T500
Diagnostic LED
To the left of these keys are two LEDs (branch A on the left, branch B on the right)
which, in association with the keys, indicate the result of a completed diagnosis. If a
connected, addressed actuator does not communicate correctly with the Saia PCD
®
master station, the LED flashes. The number of flash signals matches the bus ad
-
dress of the actuator. They are repeated 5 times, with interruption.
Function LED
These LEDs are visible even when the cover is closed and indicate the following
states:
LED
off
on
0
Channel 1 = Branch A
Channel 2 = Branch B
Channel 1 = Branch B
1
Branch A is switched on
Branch A is switched off
2
Transmit signals at branch A
3
Transmit or receive signals at branch A
4
Branch B is switched on
Branch B is switched off
5
Transmit signals at branch B
6
Transmit or receive signals at branch B
Base address
The PCD2.T500 Module can be slotted into any I / O module socket on the
PCD1 / PCD2. The base address of the socket is required for software linking in the
function boxes. For ease of wiring, it is recommended to choose a socket near to the
communications ports.
4.11.3 Connection and wiring
Branch B
Connecting boxes
Branch A
Communications channels
1 and 2
–
+
PP
BELIMO
8
–
+
PP
BELIMO
2
–
+
PP
BELIMO
1
–+
PP
BELIMO
1
– +
PP
BELIMO
2
–+
PP
BELIMO
8
RX2
TX2
RX1
TX1
B COM
A COM
GND
GND
+24 VDC
GND
0
1
2
3
4
5
6
7
8
9
PCD2
.T500
Terminal
Designation
Description
0
Rx2
Receive line
Communications channel 2
1
Tx2
Transmit line
Communications channel 2
2
Rx1
Receive line
Communications channel 1
3
TX1
Transmit line
Communications channel 1
4
B Com
Communication branch B
5
A Com
Communication branch A
6
-
Earth connection for actuators, branches A and B
7
-
Earth connection for actuators, actuators branches A and B