
090 Series Reference Manual
2/21/05
Digital Control Systems
Page: 11
Pin #
Name
Description
1
*LOAD
Active low TTL triac control signal (triac conducts when < 0.4 V)
2
+5
5 VDC power supply
3
GND
Power supply ground
4
RELAY
Active high TTL relay control signal (relay actuated when > 2.5 V)
Table 4:
Power ECB Control Connector Pinout.
All signals in the control cable connecting the main ECB to the power ECB(s) are low voltage
(under 10 volts) and do not require line voltage capable cabling. Current requirements of all
conductors is below 0.2 amps. Conductor sizes of 24 – 26 AWG are recommended.
Control cable connectors at both ECBs are .025” square pin, 0.1” pitch headers with a locking
tab. Several manufacturers offer insulation displacement style connectors that mate directly with
headers on the ECBs, such as the AMP MTA-100 series and ITW Pancon Mas-Con series
CE/CT. Some typical part numbers are shown below. There are other manufacturers as well.
ITW Pancon PN
AMP PN
Description
CE100F26-04
640442-4
4 position IDC connector for 26 AWG wire
CE100F24-03
640441-3
3 position IDC connector for 24 AWG wire
Table 5:
Control Cable Connector
Vendor PNs.
Alarm Relay
Figure 4:
Alarm Relay Contact
Circuit
An optional DPDT relay rated 120 VAC, 1A can be supplied on
only one power ECB per Model 090. When the relay option is
installed two independent dry contact closures appear on the
two 2 position screw terminals J2 & J3. The circuit for a typical
contact is shown in Figure 4.
The two 3 position headers at JP1 & JP2 program the sense of
the two relay contact outputs as shown in the table below. The
two jumper pins are connected with supplied shorting blocks.
Pin 1 on all connectors is denoted with a square pad.
JP1 pins connected
J2 Sense
JP2 pins connected
J3 Sense
1 - 2
Normally closed (NC)
1 - 2
Normally Closed (NC)
2 - 3
Normally Open (NO)
2 - 3
Normally Open (NO)
Table 6:
Relay Contact Sense Jumper Settings.
Normally Closed means the relay contact is closed when the RELAY signal is at logic low.
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