GE IC697VDD100 24 VDC Source, 64 point
monitor the user’s contacts via the N.C. contacts of the secondpole.
The N.C. contacts provide a logic one from the contacts for a
logic one written to the Data Register. This provides positive
data feedback from the contact BIT logic. When a logic one is
written to the Control Register, it activates the relay which
causes the N.O. contacts to close and the N.C. contacts to open.
When the contact BIT logic is read, a logic one is returned.
The Control Data Registers are also monitored because the
relays take a long time (7ms maximum) to change their
contacts. VME accesses of the board can execute so quickly the
relays seem to be faulty resulting in erroneous conclusions. To
prevent this the user can check the Data Register’s state,
instead of waiting for the relay’s contacts to close.
This board uses latching relays which hold their state when
power is removed. This means that closed contacts stay closed
until commanded to open.
Board Functions: Sixty-four one Form C latching relay contacts
via two 96-pin DIN connectors. One extra set of contacts (the
N.C. set) is used for BIT. Latching relays hold their state (even
with power removed) until commanded to change.
Compliance: The VMIVME-2210 conforms to the ANSI/IEEE STD
1014-1987 IEC 821 and 297 VMEbus specification with the
following mnemonics: A24, A16: 3D/39, 2D/29: D32, D16,
D08(EO): Slave.
Addressing Scheme: The base address of this board contains
the board ID. Stacked above this 16-bit word is a 16-bit CSR. The
Output Registers are placed at the next longword boundary
above the CSR. Finally, the Contact Registers are stacked above
the Output Registers. The Output and the Contact Registers are
addressable as sixteen 8-bit bytes, eight 16-bit words, or four
32-bit longwords, located on any 128-bit boundary within
standard data or short supervisory or nonprivileged I/O space.
Board Addressing: Twenty jumpers are used to select the base
address of the board. One jumper determines the address space
(standard data or short I/O) of the board. Another chooses
supervisory, nonprivileged, or either access mode. And the
remaining 18 set up the base address of the board.
Built-in-Test: Board testing is accomplished by performing a
read operation. Reading the address of the relay in question will
place the state of its Data Register on the bus. Reading the
Contact Register transfers the state of the second N.C. contact
to the bus. Both the data controlling the relay and the contact
state can now be compared. This is done because the relay
takes so long (7 ms maximum) to change its state. With this
information, the user can determine when the relay contacts
have changed state.
Nonlatching Option: If the nonlatching option is ordered, then
standard relays are used. The contact data is not affected.
However, the contacts will NOT hold when power is interrupted.
This option will permit resets and power loss to place the relays
in their normal position. Thus, N.O. contacts will open and the
N.C. contacts will close. All other board operations are the same
as those for the latching version.

Output Characteristics
Contact Material: Silver alloy (Gold clad)
Maximum Switching Voltage: 220VDC, 250VAC resistive load
Maximum Switching Current: 2A DC, AC resistive load
Switching Power: 60W or 125VA resistive
Initial Contact Resistance: 50mW (by voltage drop 6VDC 1A)
Contact Connect Times - Opening or Closing: 6.5ms maximum
with .5ms typical bounce time
Dielectric Strength: 750VAC, 50/60 Hz for 1 minute between
contacts of the same pole
Surge Withstand Voltage: Conforms to Part 68 of FCC
Regulations
Service Life: 5 x 105 minimum operations at rated current
Physical/Environmental Specifications
Dimensions: 6U double slot Eurocard form factor
Height 9.2 in. (233.4mm)
Depth 6.3 in. (160mm)
Thickness 0.8 in. (20.3mm)
Power Requirements: +5VDC (±5 percent), 4A maximum
Temperature:
Operating: 0 to +55° C
Storage: -20 to +85° C
Relative Humidity – 20% to 80%, noncondensing
Cooling: Forced air convection
Output Connector: Two front panel mounted 96-pin DIN
connectors
MTBF: Contact Factory
Trademarks
All registered trademarks are the property of their respective
owners.