D396-14-880 Issue J
Page 24
© Edwards Limited 2008. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Installation
3.3
Introduction to Controller electrical connections
When you make the electrical connections to the Controller described in the following sections, refer to
for
full details of the logic interface connections and refer to Figures
and
which show schematic diagrams of the
electrical connections. Take note of the following:
z
The backing pump and bakeout band connectors are not available on the EXC120E Controller.
z
The EXC120 and EXC120E Controllers have a 17-way logic interface connector. The EXC300 and EXC300M
Controllers have an 18-way logic interface connector.
You must provide suitable strain-relief on the cables which you fit to the Controller.
Table 9 - Logic interface pins
Pin number
(EXC300/M)
Signal
Polarity
*
*
+ = positive, - = negative, N/A = not applicable.
Signal
type
Pin number
(EXC120/E)
1
Vent-valve electrical supply: 24 V
+
Supply
1
2
Vent-valve electrical supply: 0 V
†
†
This supply line is raised to +24 V to de-energise the valve coil and vent the system.
-
2
3
Air-cooler electrical supply: 24 V
+
Supply
3
4
Air-cooler electrical supply: 0 V
-
4
5
TMP Normal (closed when pump speed
reaches the Normal speed setpoint)
N/A
Status
outputs
5
6
TMP Fail (open when fail condition exists)
N/A
6
7
Axial Emergency (open when Axial
Emergency condition exists)
‡
‡
Only available on the EXC300M Controller.
N/A
-
8
Status output isolated common
N/A
7
9
**
**
The EXC300/300M Controller is supplied with pins 9 and 10 linked together, pins 13 and 14
linked together and pins 15 and 16 linked together on the mating connector.
Start/Stop: Close for Start
+
Control
input
8
††
††
The EXC120/E Controller is supplied with pins 8 and 9 linked together, pins 12 and 13 linked
together and pins 14 and 15 linked together on the mating connector.
10
-
9
11
Standby: Close for Standby
+
Control
input
10
12
-
11
13
TMPI (TMP Interlock): Close
for EXT pump operation
+
Control
input
14
-
15
SYSI (SYS Interlock): Close
for backing pump operation
+
Control
input
16
-
17
Pump speed
+
Analogue
output
16
18
-
17
