Liquid Controls SP3000 - Manual (Page 11)

11
2.2 CONNECTING INPUTS AND OUTPUTS
Make sure all power is disconnected before making any electrical connections. All connections are
completed at the rear terminal strips as indicated in the external wiring diagram. If cables are in areas with
heavy electrical fields, shielding will be required for noise immunity. One end of the shielding should be
connected to earth ground. Figures 2-2 though 2-9 show the input, output and power wiring locations for
the 32 point terminal block on the back of the instrument.
PIN RTD VOLTAGE IN CURRENT IN FUNCTION
1
2
3
4
5
6 RTD EXCITATION +
RTD SENSE +
RTD SENSE –
RTD EXCITATION –
GROUND (SHIELD)
---------------------------- -------------------------
-------------------------
-------------------------
-------------------------
V IN – (GND)
V IN + ----------------------
----------------------
----------------------
I IN +
I IN – (GND)
----------------------
CHANNEL 1
TEMPERATURE
7
8
9
10
11
12
RTD EXCITATION +
RTD SENSE +
RTD SENSE –
RTD EXCITATION –
GROUND (SHIELD)
----------------------------
-------------------------
-------------------------
V IN – (GND)
V IN +
----------------------
I IN +
I IN – (GND)
----------------------
CHANNEL 2
PRESSURE OR
AUX TEMP
13
14
15 ----------------------------
GROUND (SHIELD)
---------------------------- -------------------------
V IN – (GND)
V IN + I IN +
I IN – (GND)
---------------------- CHANNEL 3
FLOW
ANALOG INPUT
16
17
18 EXCITATION VOLTAGE (5.6K
Ω PULLUP TO 5 VDC)
PULSE INPUT (3-30 VOLTS)
GROUND (SHIELD)
CHANNEL 3
FLOW
ANALOG INPUT
19 ANALOG OUTPUT (SINK) ANALOG OUT 4-20mA
20
21 PULSE OUTPUT
GROUND (SHIELD) 5 V SCALED
PULSE OUTPUT
22
23
24 N.O.
N.C.
COMMON
ALARM RELAY
25
26
27 N.O.
N.C.
COMMON
FLOW ALARM
RELAY
28
29 115/230 VAC 50/60 HZ
115/230 VAC 50/60 HZ POWER (AC)
30
31 +24 VOLTS ISOLATED Output available
24 VOLTS RTN on AC Powered Units +24 VDC IN Power input for
-- DC (GND) DC Powered Units
32 CHASSIS GROUND
Figure 2-2
Terminal Designation Label