HONEYWELL 8937-HN Output expansion module

In a similar manner, each Power Pack generates an AC alarm. When an alarm is triggered, the corresponding relay de-energises. Each relay operates a volt-free contact. These are closed when healthy (relay energised) and open in alarm. The contacts share a common return line There are three jumpers, J1, J2 and J3. J1 and J2 set the Power Shelf address lines for the I2C control bus. With J1 and J2 fitted the Pack addresses are 1, 2 and 3, which is the default. Other addresses may be set by removing one or both of J1 and J2, up to 4 Shelves worth (or 12 Power Packs).J3 connects together the common return lines of the DC alarms and AC alarms. J3 is fitted by default.CON 3 provides volt-free alarm contacts as detailed in section 5.2.2 and 0 for use by the system and these are made available on a connector for ease of wiring into the system.

Power Controller

The Power Controller is designed to control and monitor the 19 inch rack mount 1U high Power Shelf Units. It is used to address each Power Pack in turn and adjust the respective Power Pack voltage. The Power Controller is a digital system and communicates with the Power Packs by means of a TC-323 Power Shelf Interconnect ribbon cable, via the Power Port. The shelf addresses are set using jumpers on the Power Port, as described in paragraph 5.2.4. The Power Controller offers adjustment of the system voltage in 100 mV steps over the range 24-28 V for the Power Packs. Power supplies share through their analogue control circuitry. A Power Controller will ensure that a power supply, regardless of its voltage setting when plugged in, is adjusted (via the I2C serial data bus) to be within the current/voltage sharing window of the power supply’s analogue control circuitry.

The front panel contains two switches. 

The Address switch is used to select a Power Pack. The Voltage switch is used to raise or lower the voltage of that Power Pack. The two displays show the current and voltage of that Power Pack. Up to 12 hot swap Power Packs can be used in parallel. The Power Controller can be used to select a particular Power Pack’s position and read the current being drawn from that unit with a resolution of 100 mA. Note that the Power Controller should not be connected to power supplies on different busbars with the TC-323 cable, because it will attempt to perform load sharing between unconnected power supplies. It may also be presented with power supplies having duplicate addresses on its I2C bus. Unused connectors on the TC-323 cable should be tied back and left unused.

The main products

Spare parts spare parts, the DCS control system of PLC system and the robot system spare parts,

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